Surface & Coatings Technology最新文献_第3页

Effect of substrate roughness on AlCoCrFeNiNb0.6 HEA coating growth, adhesion and wear behavior 基体粗糙度对AlCoCrFeNiNb0.6 HEA涂层生长、附着力和磨损性能的影响

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-30 DOI: 10.1016/j.surfcoat.2026.133248

Filipe Caldatto Dalan , Argemiro Soares da Silva Sobrinho , Luis Marcelo Garcia da Silva , Sydney Ferreira Santos , André Ricardo Marcondes , Kátia Regina Cardoso

The influence of substrate surface roughness on the growth, adhesion, and tribological behavior of AlCoCrFeNiNb0.6 high-entropy alloy (HEA) coatings is reported in this manuscript. The coatings were deposited by magnetron sputtering onto API 5L X70 steel substrates using deposition powers of 100 W and 200 W. Two surface preparation conditions, mechanical polishing and abrasive blasting, were evaluated. Structural analysis by X-ray diffraction (XRD) indicated that the coatings were predominantly amorphous, while scanning electron microscopy (SEM) revealed that variations in morphology and thickness uniformity were dependent on both substrate topography and deposition power. Nanoindentation results showed hardness values of 9.9 GPa and 12.6 GPa, with corresponding elastic modulus of 189 GPa and 207 GPa, for coatings deposited at 100 W and 200 W, respectively. Adhesion tests demonstrated that increased substrate roughness significantly enhanced coating adhesion, with the critical load increasing from 316 mN to 4252 mN for the best-performing coating condition. For blasted substrates, the coefficient of friction was reduced from approximately 0.25 for the uncoated steel to values below 0.15 for the HEA-coated samples, with improved wear stability even under higher normal loads. Abrasive and fatigue wear mechanisms were predominant in the coated samples, whereas adhesive wear dominated the uncoated substrates. These results highlight that substrate surface condition is a key parameter for optimizing the adhesion and tribological performance of HEA coatings in mechanically demanding applications.

本文报道了基体表面粗糙度对高熵合金（HEA）涂层生长、粘附和摩擦学性能的影响。采用磁控溅射的方法在API 5L X70钢基体上沉积镀层，沉积功率分别为100w和200w。对机械抛光和喷砂两种表面处理条件进行了评价。x射线衍射（XRD）分析表明，涂层以非晶态为主，扫描电镜（SEM）分析表明，涂层的形貌和厚度均匀性的变化取决于衬底形貌和沉积功率。在100w和200w下，纳米压痕的硬度分别为9.9 GPa和12.6 GPa，弹性模量分别为189 GPa和207 GPa。附着力测试表明，基体粗糙度的增加显著增强了涂层的附着力，涂层最佳状态的临界载荷从316 mN增加到4252 mN。对于喷砂的基材，摩擦系数从未涂覆钢的约0.25降低到hea涂层样品的0.15以下，即使在更高的正常载荷下也能提高磨损稳定性。涂层样品的磨损机制主要是磨料磨损和疲劳磨损，而未涂层的基体主要是粘着磨损。这些结果表明，在机械要求苛刻的应用中，衬底表面条件是优化HEA涂层粘附性能和摩擦学性能的关键参数。

{"title":"Effect of substrate roughness on AlCoCrFeNiNb0.6 HEA coating growth, adhesion and wear behavior","authors":"Filipe Caldatto Dalan , Argemiro Soares da Silva Sobrinho , Luis Marcelo Garcia da Silva , Sydney Ferreira Santos , André Ricardo Marcondes , Kátia Regina Cardoso","doi":"10.1016/j.surfcoat.2026.133248","DOIUrl":"10.1016/j.surfcoat.2026.133248","url":null,"abstract":"<div><div>The influence of substrate surface roughness on the growth, adhesion, and tribological behavior of AlCoCrFeNiNb0.6 high-entropy alloy (HEA) coatings is reported in this manuscript. The coatings were deposited by magnetron sputtering onto API 5L X70 steel substrates using deposition powers of 100 W and 200 W. Two surface preparation conditions, mechanical polishing and abrasive blasting, were evaluated. Structural analysis by X-ray diffraction (XRD) indicated that the coatings were predominantly amorphous, while scanning electron microscopy (SEM) revealed that variations in morphology and thickness uniformity were dependent on both substrate topography and deposition power. Nanoindentation results showed hardness values of 9.9 GPa and 12.6 GPa, with corresponding elastic modulus of 189 GPa and 207 GPa, for coatings deposited at 100 W and 200 W, respectively. Adhesion tests demonstrated that increased substrate roughness significantly enhanced coating adhesion, with the critical load increasing from 316 mN to 4252 mN for the best-performing coating condition. For blasted substrates, the coefficient of friction was reduced from approximately 0.25 for the uncoated steel to values below 0.15 for the HEA-coated samples, with improved wear stability even under higher normal loads. Abrasive and fatigue wear mechanisms were predominant in the coated samples, whereas adhesive wear dominated the uncoated substrates. These results highlight that substrate surface condition is a key parameter for optimizing the adhesion and tribological performance of HEA coatings in mechanically demanding applications.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"523 ","pages":"Article 133248"},"PeriodicalIF":6.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Silver-enhanced ZrN-MoSN composite films via magnetron sputtering: Insighting into the microstructure and optimizing self-lubricating properties 磁控溅射法制备银增强ZrN-MoSN复合膜：微观结构研究及自润滑性能优化

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-30 DOI: 10.1016/j.surfcoat.2026.133247

Jing Luan , Zijun Cao , Hongying Lu , Songtao Dong , Lei Wang , Takayuki Tokoroyama , Hongbo Ju

The multi-lubricant synergistic strategy is widely recognized as one of the most effective approaches for developing solid self-lubricant materials to replace conventional oil- or grease-based lubricant systems. This study employed RF magnetron sputtering to dope Ag into an optimized ZrN–MoSN system, with the aim of enhancing its tribological performance. Ag incorporation induced nanoscale structural heterogeneity within the film, resulting in a multiphase architecture comprising face-centered cubic (fcc) ZrN, fccAg, Mo–S–N species (hexagonal close-packed (hcp) MoS₂, amorphous Mo(SN)ₓ, and MoS₂(N₂), and Ag–S-based compounds). Although Ag addition reduced the mechanical strength of the film, it markedly enhanced its self-lubricant capacity at both room temperature (RT) and elevated temperatures (500 °C). Tribological performance is driven by synergistic lubrication of multiple tribo-phases. At room temperature, the film contains MoS₂, MoO₃, and Ag₂Mo₂O₇, which transform at elevated temperatures into an oxide-dominated assemblage, primarily Ag₂MoO₄, revealing the temperature-dependent evolution of the tribo-phase. However, the trade-off between friction reduction and wear resistance persists, primarily owing to reduced hardness and the formation of mechanically fragile tribo-layers.

多润滑剂协同策略被广泛认为是开发固体自润滑材料以取代传统油基或脂基润滑系统的最有效方法之一。本研究采用射频磁控溅射技术将Ag掺杂到优化的ZrN-MoSN体系中，以提高其摩擦学性能。Ag的掺入诱导了薄膜内部纳米级结构的非均质性，形成了由面心立方（fcc） ZrN、fccAg、Mo - s - N(六方密排（hcp） MoS2、无定形Mo（SN）ₓ、MoS₂（N₂）和Ag基化合物组成的多相结构。Ag的加入虽然降低了膜的机械强度，但在室温（RT）和高温（500℃）下，它都显著提高了膜的自润滑能力。摩擦学性能是由多个摩擦相的协同润滑驱动的。在室温下，薄膜含有MoS₂，MoO₃和Ag₂Mo₂O₇，它们在高温下转化为氧化物主导的组合，主要是Ag₂MoO₄，揭示了摩擦相的温度依赖演化。然而，摩擦减少和耐磨性之间的权衡仍然存在，主要是由于硬度降低和机械脆性摩擦层的形成。

{"title":"Silver-enhanced ZrN-MoSN composite films via magnetron sputtering: Insighting into the microstructure and optimizing self-lubricating properties","authors":"Jing Luan , Zijun Cao , Hongying Lu , Songtao Dong , Lei Wang , Takayuki Tokoroyama , Hongbo Ju","doi":"10.1016/j.surfcoat.2026.133247","DOIUrl":"10.1016/j.surfcoat.2026.133247","url":null,"abstract":"<div><div>The multi-lubricant synergistic strategy is widely recognized as one of the most effective approaches for developing solid self-lubricant materials to replace conventional oil- or grease-based lubricant systems. This study employed RF magnetron sputtering to dope Ag into an optimized ZrN–MoSN system, with the aim of enhancing its tribological performance. Ag incorporation induced nanoscale structural heterogeneity within the film, resulting in a multiphase architecture comprising face-centered cubic (fcc) ZrN, fcc<img>Ag, Mo–S–N species (hexagonal close-packed (hcp) MoS<sub>2</sub>, amorphous Mo(SN)ₓ, and MoS₂(N₂), and Ag–S-based compounds). Although Ag addition reduced the mechanical strength of the film, it markedly enhanced its self-lubricant capacity at both room temperature (RT) and elevated temperatures (500 °C). Tribological performance is driven by synergistic lubrication of multiple tribo-phases. At room temperature, the film contains MoS₂, MoO₃, and Ag₂Mo₂O₇, which transform at elevated temperatures into an oxide-dominated assemblage, primarily Ag₂MoO₄, revealing the temperature-dependent evolution of the tribo-phase. However, the trade-off between friction reduction and wear resistance persists, primarily owing to reduced hardness and the formation of mechanically fragile tribo-layers.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"524 ","pages":"Article 133247"},"PeriodicalIF":6.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fe–Cr co-sputtered thin films: Effect of composition on microstructure and thermal stability Fe-Cr共溅射薄膜：成分对微观结构和热稳定性的影响

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-30 DOI: 10.1016/j.surfcoat.2026.133237

Chiara Menegus , Daniel Ariosa , Vittorio Montanelli , Marta D. Rossell , Claudia Cancellieri

Magnetron-sputtered thin films can differ markedly from their bulk counterparts, highlighting the need to understand how deposition-induced non-equilibrium effects influence their microstructure and stability. Fe–Cr alloys provide a convenient system to model the behavior of stainless steels, but the properties of the films require careful characterization first. In this work, the influence of composition on the microstructure of co-sputtered Fe–Cr thin films is investigated, with a focus on the formation and stability of solid solutions across a range of Cr-to-Fe ratios. Structural analysis was performed using X-ray diffraction (XRD), where a random intercalation model was employed to fit the diffraction data and quantify lattice parameter evolution with composition. These findings were correlated with morphological and compositional analyses via scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM) and energy-dispersive X-ray spectroscopy (EDS), providing insight into elemental distribution and film homogeneity. These techniques were also employed to assess the effect of a 773 K annealing treatment on sputtered films of different composition. The results reveal a systematic variation in microstructure with composition and demonstrate the compositional limits for stable solid solution formation under thermal load. This work contributes to the understanding of phase behavior and microstructural evolution in Fe–Cr alloy thin films.

磁控溅射薄膜可以明显不同于它们的体相对应，强调需要了解沉积诱导的非平衡效应如何影响其微观结构和稳定性。Fe-Cr合金提供了一个方便的系统来模拟不锈钢的行为，但薄膜的性能需要先仔细表征。在这项工作中，研究了成分对共溅射Fe-Cr薄膜微观结构的影响，重点研究了在一定范围内cr - fe比下固溶体的形成和稳定性。利用x射线衍射（XRD）进行结构分析，采用随机插层模型拟合衍射数据，量化晶格参数随成分的演变。这些发现与通过扫描电子显微镜（SEM）、扫描透射电子显微镜（STEM）和能量色散x射线能谱（EDS）进行的形态和成分分析相关联，从而深入了解元素分布和薄膜均匀性。这些技术也被用来评估773 K退火处理对不同成分溅射膜的影响。结果表明，微观结构随成分的变化有系统的变化，并证明了在热负荷下形成稳定固溶体的成分极限。这项工作有助于了解Fe-Cr合金薄膜的相行为和微观组织演变。

{"title":"Fe–Cr co-sputtered thin films: Effect of composition on microstructure and thermal stability","authors":"Chiara Menegus , Daniel Ariosa , Vittorio Montanelli , Marta D. Rossell , Claudia Cancellieri","doi":"10.1016/j.surfcoat.2026.133237","DOIUrl":"10.1016/j.surfcoat.2026.133237","url":null,"abstract":"<div><div>Magnetron-sputtered thin films can differ markedly from their bulk counterparts, highlighting the need to understand how deposition-induced non-equilibrium effects influence their microstructure and stability. Fe–Cr alloys provide a convenient system to model the behavior of stainless steels, but the properties of the films require careful characterization first. In this work, the influence of composition on the microstructure of co-sputtered Fe–Cr thin films is investigated, with a focus on the formation and stability of solid solutions across a range of Cr-to-Fe ratios. Structural analysis was performed using X-ray diffraction (XRD), where a random intercalation model was employed to fit the diffraction data and quantify lattice parameter evolution with composition. These findings were correlated with morphological and compositional analyses via scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM) and energy-dispersive X-ray spectroscopy (EDS), providing insight into elemental distribution and film homogeneity. These techniques were also employed to assess the effect of a 773 K annealing treatment on sputtered films of different composition. The results reveal a systematic variation in microstructure with composition and demonstrate the compositional limits for stable solid solution formation under thermal load. This work contributes to the understanding of phase behavior and microstructural evolution in Fe–Cr alloy thin films.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"523 ","pages":"Article 133237"},"PeriodicalIF":6.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal cycling failure mechanism and damage quantification of PS-PVD sprayed Yb2Si2O7 environmental barrier coating PS-PVD喷涂Yb2Si2O7环境屏障涂层热循环失效机理及损伤量化

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-29 DOI: 10.1016/j.surfcoat.2026.133240

Rong Ma , Tingchen Du , Xueling Fan , Xiaolong Gao , Jiachen Qian , Weihai Li

The thermal cycling behavior and failure mechanism of Yb₂Si₂O₇ environmental barrier coatings (EBCs) deposited by plasma spray-physical vapor deposition were investigated after 1000 cycles of exposure in dry air at 1350 °C and 1250 °C. A damage quantification method based on interfacial damage was developed to characterize the degradation of EBCs. The results revealed that thermal cycling induced the formation of pores in the top coat (TC) and bond coat (BC) layers as well as in the interface regions. The thermally grown oxide (TGO) layer at the interface progressively thickened, leading to the initiation of vertical cracks, followed by delamination at the TGO/BC interface. The damage caused by thermal cycling was significantly more severe than that induced by isothermal oxidation, with localized delamination observed after only 800 cycles. Interfacial delamination was the primary mode of thermal cycling damage. Frequent temperature fluctuations resulted in oxidation instability, manifested by the formation of TGO layers with distinct color contrasts. Furthermore, a damage constitutive model was established based on the degradation of critical spallation resistance and thermoelastic theory. The damage quantification theory was validated, as evidenced by the prediction of damage evolution and the corresponding delamination failure in room-temperature compression tests after thermal cycling. The damage evolution followed a power-law function of the number of cycles, providing a valuable reference for the quantitative assessment of EBCs damage.

研究了等离子喷涂-物理气相沉积Yb2Si2O7环境屏障涂层（EBCs）在1350℃和1250℃干燥空气中1000次的热循环行为和失效机理。提出了一种基于界面损伤的损伤量化方法来表征EBCs的降解。结果表明，热循环诱导了表面涂层（TC）和结合涂层（BC）以及界面区域的孔隙形成。界面处的热生长氧化物（TGO）层逐渐增厚，导致垂直裂纹的萌生，随后在TGO/BC界面处发生分层。热循环引起的损伤明显比等温氧化引起的损伤严重，仅在800次循环后就出现了局部分层。界面分层是热循环损伤的主要形式。频繁的温度波动导致氧化不稳定，表现为形成具有鲜明对比色的氧化氧化石墨烯层。在此基础上，建立了基于临界裂阻退化和热弹性理论的损伤本构模型。通过热循环后室温压缩试验损伤演化及相应的分层破坏预测，验证了损伤量化理论的有效性。损伤演化遵循循环次数的幂律函数，为电路基损伤的定量评估提供了有价值的参考。

{"title":"Thermal cycling failure mechanism and damage quantification of PS-PVD sprayed Yb2Si2O7 environmental barrier coating","authors":"Rong Ma , Tingchen Du , Xueling Fan , Xiaolong Gao , Jiachen Qian , Weihai Li","doi":"10.1016/j.surfcoat.2026.133240","DOIUrl":"10.1016/j.surfcoat.2026.133240","url":null,"abstract":"<div><div>The thermal cycling behavior and failure mechanism of Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> environmental barrier coatings (EBCs) deposited by plasma spray-physical vapor deposition were investigated after 1000 cycles of exposure in dry air at 1350 °C and 1250 °C. A damage quantification method based on interfacial damage was developed to characterize the degradation of EBCs. The results revealed that thermal cycling induced the formation of pores in the top coat (TC) and bond coat (BC) layers as well as in the interface regions. The thermally grown oxide (TGO) layer at the interface progressively thickened, leading to the initiation of vertical cracks, followed by delamination at the TGO/BC interface. The damage caused by thermal cycling was significantly more severe than that induced by isothermal oxidation, with localized delamination observed after only 800 cycles. Interfacial delamination was the primary mode of thermal cycling damage. Frequent temperature fluctuations resulted in oxidation instability, manifested by the formation of TGO layers with distinct color contrasts. Furthermore, a damage constitutive model was established based on the degradation of critical spallation resistance and thermoelastic theory. The damage quantification theory was validated, as evidenced by the prediction of damage evolution and the corresponding delamination failure in room-temperature compression tests after thermal cycling. The damage evolution followed a power-law function of the number of cycles, providing a valuable reference for the quantitative assessment of EBCs damage.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"524 ","pages":"Article 133240"},"PeriodicalIF":6.1,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A sturdy PDMS-based multifunctional smooth coating with long-term corrosion resistance, anti-icing/deicing durability and self-cleaning performance 一种坚固的pdm多功能光滑涂层，具有长期耐腐蚀性，抗冰/除冰耐久性和自清洁性能

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-29 DOI: 10.1016/j.surfcoat.2026.133242

Yan Zhang , Ying Wang , Ningbo Hu , Lin Liu , Xiaobing Zhao , Yuanyuan Zhu , Ningyi Yuan , Jianning Ding

Poor corrosion resistance and susceptibility to ice accumulation at low temperature significantly limit the application of magnesium (Mg) alloy. It is crucial to develop a durable coating that offers long-term anti-corrosion and anti-icing/deicing properties for the protection of Mg alloy. In this study, a LDH (layered double hydroxide)-PDMS (polydimethylsiloxane)/SO (dimethyl silicone oil) smooth coating with multiple protection function was successfully constructed on the surface of Mg alloy substrate based on the three-level cooperative protection mechanism of “dynamic lubrication layer-static barrier layer-nano oil storage unit”. The combined action of PDMS and LDH could form a robust barrier to passively block corrosive media. The SO would form a dynamic lubrication layer at the surface to provide lubrication and dynamic barrier ability. The LDH could also act as the nano oil storage for SO to ensure the stability of lubrication layer. The final coating system showed excellent comprehensive properties such as long-term corrosion protection, anti-icing/deicing, hydrophobicity, self-cleaning and excellent mechanical stability. Due to the excellent barrier effect of the composite coating, it could still provide excellent corrosion protection after immersion in 3.5 wt% NaCl solution for 35 days. After 210 abrasion cycles and 320 tape-peeling cycles, respectively, the surface retained remarkably low ice adhesion strength (τ_ice < 20 kPa), demonstrating its exceptional mechanical durability. In addition, the LDH-PDMS/SO coating showed good anti-icing/deicing performance at −18 °C, outstanding adhesion (5B grade) and self-cleaning properties, and had great application potential in long-term anti-corrosion and anti-icing protection of Mg alloy.

镁合金耐腐蚀性能差，低温下易结冰，严重限制了镁合金的应用。开发一种具有长期防腐和防冰/除冰性能的耐用涂层对镁合金的保护至关重要。本研究基于“动态润滑层-静态阻隔层-纳米储油单元”三级协同保护机制，在镁合金基体表面成功构建了具有多重保护功能的LDH（层状双氢氧化物）-PDMS（聚二甲基硅氧烷）/SO（二甲基硅油）光滑涂层。PDMS和LDH的共同作用可以形成一个强大的屏障，被动地阻挡腐蚀性介质。SO会在表面形成动态润滑层，提供润滑和动态屏障能力。LDH还可以作为SO的纳米储油器，保证润滑层的稳定性。最终涂层体系具有长效防腐、防冰/除冰、疏水性、自洁性和优异的机械稳定性等综合性能。由于复合涂层具有良好的阻隔作用，在3.5 wt% NaCl溶液中浸泡35天后仍能保持良好的防腐性能。经过210次磨损循环和320次胶带剥落循环后，表面仍保持了非常低的冰附着强度（τice < 20 kPa），表明其具有优异的机械耐久性。此外，LDH-PDMS/SO涂层在- 18℃下具有良好的抗冰/除冰性能，优异的附着力（5B级）和自清洁性能，在镁合金的长期防腐和防冰保护方面具有很大的应用潜力。

{"title":"A sturdy PDMS-based multifunctional smooth coating with long-term corrosion resistance, anti-icing/deicing durability and self-cleaning performance","authors":"Yan Zhang , Ying Wang , Ningbo Hu , Lin Liu , Xiaobing Zhao , Yuanyuan Zhu , Ningyi Yuan , Jianning Ding","doi":"10.1016/j.surfcoat.2026.133242","DOIUrl":"10.1016/j.surfcoat.2026.133242","url":null,"abstract":"<div><div>Poor corrosion resistance and susceptibility to ice accumulation at low temperature significantly limit the application of magnesium (Mg) alloy. It is crucial to develop a durable coating that offers long-term anti-corrosion and anti-icing/deicing properties for the protection of Mg alloy. In this study, a LDH (layered double hydroxide)-PDMS (polydimethylsiloxane)/SO (dimethyl silicone oil) smooth coating with multiple protection function was successfully constructed on the surface of Mg alloy substrate based on the three-level cooperative protection mechanism of “dynamic lubrication layer-static barrier layer-nano oil storage unit”. The combined action of PDMS and LDH could form a robust barrier to passively block corrosive media. The SO would form a dynamic lubrication layer at the surface to provide lubrication and dynamic barrier ability. The LDH could also act as the nano oil storage for SO to ensure the stability of lubrication layer. The final coating system showed excellent comprehensive properties such as long-term corrosion protection, anti-icing/deicing, hydrophobicity, self-cleaning and excellent mechanical stability. Due to the excellent barrier effect of the composite coating, it could still provide excellent corrosion protection after immersion in 3.5 wt% NaCl solution for 35 days. After 210 abrasion cycles and 320 tape-peeling cycles, respectively, the surface retained remarkably low ice adhesion strength (τ<sub>ice</sub> < 20 kPa), demonstrating its exceptional mechanical durability. In addition, the LDH-PDMS/SO coating showed good anti-icing/deicing performance at −18 °C, outstanding adhesion (5B grade) and self-cleaning properties, and had great application potential in long-term anti-corrosion and anti-icing protection of Mg alloy.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"523 ","pages":"Article 133242"},"PeriodicalIF":6.1,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146090264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of laser microtexturing on the surface properties and tribological behaviour of hot forging tool steels 激光微织构对热锻工具钢表面性能和摩擦学性能的影响

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-29 DOI: 10.1016/j.surfcoat.2026.133222

Erik Calvo-García , Cristiano S. Abreu , Óscar Barro , Felipe Arias-González , Antonio Riveiro , Rafael Comesaña , Manuel Román , Salvador Pérez-Betanzos , Fernando Lusquiños , José R. Gomes , Juan Pou

Laser microtexturing is a promising technique to enhance the limited durability of forging tools by generating reservoirs capable of trapping lubricant particles, thus reducing friction even under hot working conditions. This work aims to evaluate the effects of laser microtexturing variables on the surface properties and wear resistance of AISI H13 hot forging tool steel. For the first time, the application of laser microtexturing treatments was performed on H13 steel in three heat treatment conditions: annealing without subsequent heat treatment, quenching and tempering, and nitriding after quenching and tempering. The effects of laser intensity, scanning speed, pitch, and number of passes on roughness, hardness, and wettability were analysed for each heat treatment condition. Roughness increased when using higher laser intensity and number of passes, or lower scanning speed, whereas the surface hardness was barely altered by laser treatments. Moreover, the treatments that produced higher roughness improved surface wettability for forging lubricants, and the grooves generated through laser treatments effectively retained graphite particles from hot forging lubricants, which is expected to be beneficial for the tribological behaviour of hot forging tools. Wear tests in a lubricant medium at room temperature revealed that treatments with lower heat inputs and larger pitches led to reduced mass losses. Finally, the major novelty of this work is the development, for the first time, of ring compression tests on laser-microtextured tools to evaluate friction under hot forging conditions. These tests revealed a clear decrease in the coefficient of friction in textured samples compared to non-textured ones, especially when using higher scanning speeds or larger pitches. Overall, this work provides new insights into improving the tribological performance of hot forging tools through laser microtexturing treatments.

激光微纹理是一种很有前途的技术，通过产生能够捕获润滑剂颗粒的储层来提高锻造工具的有限耐用性，从而减少即使在热工作条件下的摩擦。研究了激光微织构变量对AISI H13热锻工具钢表面性能和耐磨性的影响。首次将激光微织构处理应用于H13钢，分别在退火后不进行热处理、淬火回火和淬火回火后渗氮三种热处理条件下进行。分析了不同热处理条件下激光强度、扫描速度、节距和道次对粗糙度、硬度和润湿性的影响。高激光强度、高次数、低扫描速度使表面粗糙度增加，而激光处理对表面硬度几乎没有影响。此外，产生更高粗糙度的处理改善了锻造润滑剂的表面润湿性，并且通过激光处理产生的凹槽有效地保留了热锻造润滑剂中的石墨颗粒，这有望有利于热锻造工具的摩擦学行为。在润滑油介质中进行的室温磨损试验表明，较低的热输入和较大的螺距处理可以减少质量损失。最后，这项工作的主要新颖之处在于，首次在激光微织构工具上开发了环压缩测试，以评估热锻造条件下的摩擦。这些测试显示，与非纹理样品相比，纹理样品的摩擦系数明显降低，特别是在使用更高的扫描速度或更大的间距时。总的来说，这项工作为通过激光微织构处理改善热锻工具的摩擦学性能提供了新的见解。

{"title":"Effects of laser microtexturing on the surface properties and tribological behaviour of hot forging tool steels","authors":"Erik Calvo-García , Cristiano S. Abreu , Óscar Barro , Felipe Arias-González , Antonio Riveiro , Rafael Comesaña , Manuel Román , Salvador Pérez-Betanzos , Fernando Lusquiños , José R. Gomes , Juan Pou","doi":"10.1016/j.surfcoat.2026.133222","DOIUrl":"10.1016/j.surfcoat.2026.133222","url":null,"abstract":"<div><div>Laser microtexturing is a promising technique to enhance the limited durability of forging tools by generating reservoirs capable of trapping lubricant particles, thus reducing friction even under hot working conditions. This work aims to evaluate the effects of laser microtexturing variables on the surface properties and wear resistance of AISI H13 hot forging tool steel. For the first time, the application of laser microtexturing treatments was performed on H13 steel in three heat treatment conditions: annealing without subsequent heat treatment, quenching and tempering, and nitriding after quenching and tempering. The effects of laser intensity, scanning speed, pitch, and number of passes on roughness, hardness, and wettability were analysed for each heat treatment condition. Roughness increased when using higher laser intensity and number of passes, or lower scanning speed, whereas the surface hardness was barely altered by laser treatments. Moreover, the treatments that produced higher roughness improved surface wettability for forging lubricants, and the grooves generated through laser treatments effectively retained graphite particles from hot forging lubricants, which is expected to be beneficial for the tribological behaviour of hot forging tools. Wear tests in a lubricant medium at room temperature revealed that treatments with lower heat inputs and larger pitches led to reduced mass losses. Finally, the major novelty of this work is the development, for the first time, of ring compression tests on laser-microtextured tools to evaluate friction under hot forging conditions. These tests revealed a clear decrease in the coefficient of friction in textured samples compared to non-textured ones, especially when using higher scanning speeds or larger pitches. Overall, this work provides new insights into improving the tribological performance of hot forging tools through laser microtexturing treatments.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"523 ","pages":"Article 133222"},"PeriodicalIF":6.1,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146090265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of MoS2 lubricating coatings on the corrosion behaviour of monel 400 alloy MoS2润滑涂层对蒙乃尔400合金腐蚀行为的影响

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-29 DOI: 10.1016/j.surfcoat.2026.133243

Qingkai Chu , Huimin Liu , Chujunwen Lu , Qinghao Sun , Julin Wang

In this study, the corrosion behaviour of Monel 400 with and without a MoS₂ lubricating coating was comparatively analysed through electrochemical and salt spray corrosion experiments, alongside multiple characterization techniques. The coated samples exhibited significantly accelerated corrosion, with a 2.3-fold increase in corrosion rate during salt spray testing and a rise in corrosion current density from 0.49 μA·cm⁻² to 1.15 μA·cm⁻². Electrochemical impedance spectroscopy showed an 81.9% reduction in charge transfer resistance. The deterioration mechanism involves several interconnected processes: the MoS₂ coating promotes anodic dissolution while suppressing the formation of the protective passivation film (Cu₂O/Ni(OH)₂). XPS analysis revealed a corresponding increase in non-protective corrosion products, with the CuO/Cu₂O ratio rising from 0.47 to 0.86 and the NiCl₂/Ni(OH)₂ ratio from 0.40 to 0.68. The porous structure of the coating facilitated the adsorption and transport of corrosive media (Cl⁻, H₂O, O₂), leading to an increase in non-protective corrosion products (CuO/NiCl₂). Furthermore, the oxidation of MoS₂ to MoO₃ further disrupted the surface film and catalysed corrosion reactions. These mechanisms act synergistically, leading to a significant reduction in the corrosion resistance of Monel 400.

在本研究中，通过电化学和盐雾腐蚀实验以及多种表征技术，对比分析了蒙乃尔400在有MoS2润滑涂层和没有MoS2润滑涂层时的腐蚀行为。盐雾腐蚀速率提高了2.3倍，腐蚀电流密度从0.49 μA·cm−2增加到1.15 μA·cm−2。电化学阻抗谱显示电荷转移电阻降低81.9%。氧化变质机制涉及几个相互关联的过程：MoS2涂层促进阳极溶解，同时抑制保护性钝化膜（Cu2O/Ni(OH)2）的形成。XPS分析显示，非保护性腐蚀产物也相应增加，CuO/Cu2O比值从0.47上升到0.86,NiCl2/Ni(OH)2比值从0.40上升到0.68。涂层的多孔结构有利于腐蚀介质（Cl−,H2O, O2）的吸附和传输，导致非保护性腐蚀产物（CuO/NiCl2）的增加。此外，MoS2氧化为MoO3进一步破坏了表面膜并催化了腐蚀反应。这些机制协同作用，导致蒙乃尔400的耐腐蚀性显著降低。

{"title":"Effect of MoS2 lubricating coatings on the corrosion behaviour of monel 400 alloy","authors":"Qingkai Chu , Huimin Liu , Chujunwen Lu , Qinghao Sun , Julin Wang","doi":"10.1016/j.surfcoat.2026.133243","DOIUrl":"10.1016/j.surfcoat.2026.133243","url":null,"abstract":"<div><div>In this study, the corrosion behaviour of Monel 400 with and without a MoS<sub>2</sub> lubricating coating was comparatively analysed through electrochemical and salt spray corrosion experiments, alongside multiple characterization techniques. The coated samples exhibited significantly accelerated corrosion, with a 2.3-fold increase in corrosion rate during salt spray testing and a rise in corrosion current density from 0.49 μA·cm<sup>−2</sup> to 1.15 μA·cm<sup>−2</sup>. Electrochemical impedance spectroscopy showed an 81.9% reduction in charge transfer resistance. The deterioration mechanism involves several interconnected processes: the MoS<sub>2</sub> coating promotes anodic dissolution while suppressing the formation of the protective passivation film (Cu<sub>2</sub>O/Ni(OH)<sub>2</sub>). XPS analysis revealed a corresponding increase in non-protective corrosion products, with the CuO/Cu<sub>2</sub>O ratio rising from 0.47 to 0.86 and the NiCl<sub>2</sub>/Ni(OH)<sub>2</sub> ratio from 0.40 to 0.68. The porous structure of the coating facilitated the adsorption and transport of corrosive media (Cl<sup>−</sup>, H<sub>2</sub>O, O<sub>2</sub>), leading to an increase in non-protective corrosion products (CuO/NiCl<sub>2</sub>). Furthermore, the oxidation of MoS<sub>2</sub> to MoO<sub>3</sub> further disrupted the surface film and catalysed corrosion reactions. These mechanisms act synergistically, leading to a significant reduction in the corrosion resistance of Monel 400.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"523 ","pages":"Article 133243"},"PeriodicalIF":6.1,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146090278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of hot corrosion behavior of Ti6Al4V and TiAlN-coated Ti6Al4V alloys in Na2SO4 -V2O5 environment Na2SO4 -V2O5环境中Ti6Al4V与tialn包覆Ti6Al4V合金热腐蚀行为的比较

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-29 DOI: 10.1016/j.surfcoat.2026.133246

Burak Ceper , Ozge Ozgurluk , Ibrahim Calıs , Sefa Emre Sunbul , Yasin Ozgurluk , Mehmet Masum Tuncay

Damage mechanisms such as oxidation and hot corrosion, which shorten life of the materials and system efficiency, occur in systems operating at high temperatures in the aviation, aerospace, automotive, and defense industries. In this study, Ti6Al4V and TiAlN-coated Ti6Al4V alloys, which have high specific strength and corrosion resistance, were subjected to isothermal hot corrosion tests at 900 °C in the presence of 45% Na₂SO₄ and 55% V₂O₅ hot corrosion salts for 1, 3, 5, and 10 h under open-to-atmosphere conditions. The changing phase, microstructure, and elemental distribution of the alloys were determined using advanced characterization techniques such as SEM, EDS, and XRD. Systems with a TiAlN coating layer were found to be more durable in short- and medium-term corrosive environments compared to the Ti6Al4V alloy.

在航空、航天、汽车和国防工业的高温系统中，氧化和热腐蚀等损坏机制会缩短材料的寿命和系统效率。在本研究中，Ti6Al4V和tialn涂层Ti6Al4V合金具有高比强度和耐腐蚀性，在900°C下，在45% Na2SO4和55% V2O5热腐蚀盐的存在下，在开放气氛条件下进行了1、3、5和10 h的等温热腐蚀试验。采用SEM、EDS和XRD等先进表征技术对合金的相变相、微观结构和元素分布进行了分析。与Ti6Al4V合金相比，具有TiAlN涂层的系统在中短期腐蚀环境中更耐用。

引用次数: 0

Microstructure and properties of thick thermal barrier coatings based on Pr6O11 doped ZrO2 on titanium alloy Pr6O11掺杂ZrO2钛合金厚热障涂层的组织与性能

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-29 DOI: 10.1016/j.surfcoat.2026.133244

Lei Li , Binglin Zou , Xueqiang Cao , Yongqiu Zhang , Ying Wang , Lei Guo , Liang Zhou

Yttria-stabilized zirconia (YSZ) thick thermal barrier coating (TTBC) is an effective method for ultra-high temperature protection of titanium alloys. In order to improve the thermal insulation performance of YSZ TTBC, Pr₆O₁₁ doped ZrO₂ (PrSZ) powders were synthesized and the double-ceramic layer (DCL) structure of TTBC with PrSZ thin layer as top layer was designed. Three distinct TTBCs of YSZ, PrSZ and DCL YSZ/PrSZ were fabricated on the titanium alloy substrate by atmospheric plasma spraying (APS). Microstructure and thermal shock and thermal insulation properties of the TTBCs were investigated. The results showed that only a single-phase solid solution with cubic fluorite structure appeared during the APS process for the PrSZ powders with doping contents of 30–40 wt% Pr₆O₁₁. Compared with YSZ TTBC, PrSZ TTBCs exhibited relatively poor thermal shock performance due to the decrease in fracture toughness, but relatively superior thermal insulation property due to the increase in infrared emissivity. Notably, the DCL YSZ/PrSZ TTBCs have both superior thermal shock and thermal insulation properties, which could make them potentially attractive for high-temperature protective applications in titanium alloys.

氧化钇稳定氧化锆（YSZ）厚热障涂层（TTBC）是一种有效的钛合金超高温防护方法。为了提高YSZ TTBC的保温性能，合成了Pr6O11掺杂ZrO2 （PrSZ）粉末，并设计了以PrSZ薄层为顶层的TTBC双陶瓷层（DCL）结构。采用大气等离子喷涂技术（APS）在钛合金基体上制备了YSZ、PrSZ和DCL三种不同的ttbc。研究了ttbc的微观结构、热冲击和隔热性能。结果表明，Pr6O11掺杂量为30 ~ 40 wt%的PrSZ粉末在APS过程中只出现了具有立方萤石结构的单相固溶体。与YSZ TTBC相比，PrSZ TTBC由于断裂韧性降低，热冲击性能相对较差，但由于红外发射率增加，保温性能相对较好。值得注意的是，DCL YSZ/PrSZ ttbc具有优越的热冲击和隔热性能，这可能使它们在钛合金的高温防护应用中具有潜在的吸引力。

{"title":"Microstructure and properties of thick thermal barrier coatings based on Pr6O11 doped ZrO2 on titanium alloy","authors":"Lei Li , Binglin Zou , Xueqiang Cao , Yongqiu Zhang , Ying Wang , Lei Guo , Liang Zhou","doi":"10.1016/j.surfcoat.2026.133244","DOIUrl":"10.1016/j.surfcoat.2026.133244","url":null,"abstract":"<div><div>Yttria-stabilized zirconia (YSZ) thick thermal barrier coating (TTBC) is an effective method for ultra-high temperature protection of titanium alloys. In order to improve the thermal insulation performance of YSZ TTBC, Pr<sub>6</sub>O<sub>11</sub> doped ZrO<sub>2</sub> (PrSZ) powders were synthesized and the double-ceramic layer (DCL) structure of TTBC with PrSZ thin layer as top layer was designed. Three distinct TTBCs of YSZ, PrSZ and DCL YSZ/PrSZ were fabricated on the titanium alloy substrate by atmospheric plasma spraying (APS). Microstructure and thermal shock and thermal insulation properties of the TTBCs were investigated. The results showed that only a single-phase solid solution with cubic fluorite structure appeared during the APS process for the PrSZ powders with doping contents of 30–40 wt% Pr<sub>6</sub>O<sub>11</sub>. Compared with YSZ TTBC, PrSZ TTBCs exhibited relatively poor thermal shock performance due to the decrease in fracture toughness, but relatively superior thermal insulation property due to the increase in infrared emissivity. Notably, the DCL YSZ/PrSZ TTBCs have both superior thermal shock and thermal insulation properties, which could make them potentially attractive for high-temperature protective applications in titanium alloys.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"523 ","pages":"Article 133244"},"PeriodicalIF":6.1,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-situ diffusion-reaction strategy for enhanced corrosion resistance of a-C-coated LPBF processed titanium bipolar plates 原位扩散反应策略提高a- c涂层LPBF加工钛双极板的耐蚀性

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2026-01-29 DOI: 10.1016/j.surfcoat.2026.133241

Xiaobao Zhou , Zheyu Sun , Qiuhao Wang , Linhu Han , Jinpeng Xu , Hao Zhang , Taijun Pan , Xiaoxiao Li , Yanjie Ren

The bipolar plate serves as a critical and multifunctional component in PEMFCs. Metallic bipolar plates are susceptible to corrosion or passivation in PEMFCs, a challenge which can be mitigated by applying conductive, anti-corrosive coatings or through surface modification. In this study, highly corrosion-resistant amorphous carbon (a-C) films via magnetron sputtering were deposited onto laser powder bed fusion (LPBF)-fabricated titanium substrates, which possessed a high density of dislocations and grain boundaries that served as fast pathways to enhance the reactive diffusion of carbon. The effects of deposition temperature (ranging from 450 °C to 750 °C) on the microstructure, corrosion resistance, electrical conductivity, and hydrophobicity of a-C films were systematically investigated. TEM and XPS analysis confirmed the in-situ formation of an interfacial TiC layer during deposition at 750 °C, which resulted from the thermally activated carbon diffusion and reactions with the inherently grain-refined titanium matrix from the LPBF process. The combination of the chemically stable and well-bonded TiC interlayer, high adhesion and hydrophobicity (95°) of a-C film, contributed to the optimal corrosion resistance of the Ti(C)-750 sample. Its corrosion current density was measured to be a remarkably low 0.0748 μA/cm² when potentiodynamically polarized in 0.5 M H₂SO₄ + 0.1 ppm HF under room temperature. Moreover, Ti(C)-750 sample demonstrated a remarkably low ICR of 3.28 mΩ·cm². This superior electrical performance is primarily ascribed to the high electrical conductivities of both carbon film and the in-situ generated TiC phase during thin film deposition process.

在pemfc中，双极板是一个关键的多功能组件。金属双极板在pemfc中容易受到腐蚀或钝化，这一挑战可以通过应用导电、防腐涂层或表面改性来缓解。在这项研究中，通过磁控溅射将高耐腐蚀的非晶碳（a- c）薄膜沉积在激光粉末床熔合（LPBF）制造的钛基板上，该基板具有高密度的位错和晶界，为增强碳的反应扩散提供了快速途径。系统地研究了沉积温度（450 ~ 750℃）对a-C膜微观结构、耐蚀性、电导率和疏水性的影响。TEM和XPS分析证实，在750°C的沉积过程中，界面TiC层的形成是由热活性炭扩散和LPBF过程中固有的晶粒细化钛基体的反应引起的。化学性质稳定且结合良好的TiC中间层、a-C膜的高附着力和疏水性（95°），使得Ti(C)-750样品具有最佳的耐腐蚀性。室温下，在0.5 M H2SO4 + 0.1 ppm HF溶液中动态极化时，其腐蚀电流密度为0.0748 μA/cm2。此外，Ti(C)-750样品的ICR非常低，为3.28 mΩ·cm2。这种优异的电性能主要归功于薄膜沉积过程中碳膜和原位生成的TiC相的高导电性。

{"title":"In-situ diffusion-reaction strategy for enhanced corrosion resistance of a-C-coated LPBF processed titanium bipolar plates","authors":"Xiaobao Zhou , Zheyu Sun , Qiuhao Wang , Linhu Han , Jinpeng Xu , Hao Zhang , Taijun Pan , Xiaoxiao Li , Yanjie Ren","doi":"10.1016/j.surfcoat.2026.133241","DOIUrl":"10.1016/j.surfcoat.2026.133241","url":null,"abstract":"<div><div>The bipolar plate serves as a critical and multifunctional component in PEMFCs. Metallic bipolar plates are susceptible to corrosion or passivation in PEMFCs, a challenge which can be mitigated by applying conductive, anti-corrosive coatings or through surface modification. In this study, highly corrosion-resistant amorphous carbon (a-C) films via magnetron sputtering were deposited onto laser powder bed fusion (LPBF)-fabricated titanium substrates, which possessed a high density of dislocations and grain boundaries that served as fast pathways to enhance the reactive diffusion of carbon. The effects of deposition temperature (ranging from 450 °C to 750 °C) on the microstructure, corrosion resistance, electrical conductivity, and hydrophobicity of a-C films were systematically investigated. TEM and XPS analysis confirmed the in-situ formation of an interfacial TiC layer during deposition at 750 °C, which resulted from the thermally activated carbon diffusion and reactions with the inherently grain-refined titanium matrix from the LPBF process. The combination of the chemically stable and well-bonded TiC interlayer, high adhesion and hydrophobicity (95°) of a-C film, contributed to the optimal corrosion resistance of the Ti(C)-750 sample. Its corrosion current density was measured to be a remarkably low 0.0748 μA/cm<sup>2</sup> when potentiodynamically polarized in 0.5 M H<sub>2</sub>SO<sub>4</sub> + 0.1 ppm HF under room temperature. Moreover, Ti(C)-750 sample demonstrated a remarkably low ICR of 3.28 mΩ·cm<sup>2</sup>. This superior electrical performance is primarily ascribed to the high electrical conductivities of both carbon film and the in-situ generated TiC phase during thin film deposition process.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"524 ","pages":"Article 133241"},"PeriodicalIF":6.1,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0