Surface & Coatings Technology最新文献_第3页

Dual functionality of Zn-implanted PEO coatings on Ti6Al4V: Antibacterial activity and wear resistance Ti6Al4V表面注入锌的PEO涂层的双重功能：抗菌活性和耐磨性

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

Surface & Coatings Technology

Pub Date : 2026-03-15 Epub Date: 2026-02-01 DOI: 10.1016/j.surfcoat.2026.133239

Victor Velho de Castro , Daniel Augusto Krieger Coutinho , Victor Rosa dos Santos , Heitor Hatwig , Eduardo Pitthan , Natasha Maurmann , Vitória Milech , Matheus Bullmann , Leonardo Moreira dos Santos , Lorenza Corti Villa , Alice Elvira Teixeira dos Santos , Rodrigo Bassani Lopes , Fernanda Cortez Lopes , Patricia Pranke , Cesar Aguzzoli , Antonio Marcos Helgueira de Andrade , Célia de Fraga Malfatti

In surgical procedures, reusable instruments must undergo cleaning, disinfection, and sterilization. Thus, rigorous attention to sterilization is essential to prevent cross-contamination, and some surgical instruments may also require wear resistance. There is a gap in the literature concerning the development of Zn-incorporated PEO coatings that combine antibacterial activity with tribological properties. The novelty of this study lies in the approach to improve Ti6Al4V wear resistance and antibacterial performance through nanostructured coatings produced by Plasma Electrolytic Oxidation (PEO) with simultaneous incorporation of Zn and Ti oxides. The results indicated that the antibacterial activity of the Zn-free PEO coatings against E. coli was mainly associated with photocatalytic effects related to the anatase phase of TiO₂. In contrast, the inactivation of S. epidermidis was lower, consistent with the higher resistance characteristic of Gram-positive bacteria. For the Zn-incorporated coatings, the reduction in S. epidermidis growth was primarily governed by the leaching of Zn ions, while reactive oxygen species generated by the photocatalytic effects of the coatings also contributed to the observed activity. Coatings with higher proportions of ZnTiO₃ led to a more pronounced inhibition of bacterial growth. Zn-incorporated coatings reduced cell viability by over 70%, altered the area and morphology of fibroblast. The tribological behavior was influenced by zinc incorporation and microstructure, with TiO₂ contributing to wear resistance and ZnTiO₃ improving lubricity.

在外科手术中，可重复使用的器械必须经过清洁、消毒和灭菌。因此，严格注意灭菌对于防止交叉污染是必不可少的，并且一些手术器械也可能要求耐磨损。关于结合抗菌活性和摩擦学性能的含锌PEO涂层的开发，文献中存在空白。本研究的新颖之处在于通过等离子体电解氧化（PEO）制备纳米结构涂层，同时掺入Zn和Ti氧化物，从而提高Ti6Al4V的耐磨性和抗菌性能。结果表明，无锌PEO涂层对大肠杆菌的抑菌活性主要与tio2锐钛矿相的光催化作用有关。相比之下，表皮葡萄球菌的失活率较低，与革兰氏阳性菌的高抗性特性一致。对于含锌涂层，表皮葡萄球菌生长的减少主要是由Zn离子的浸出控制的，而涂层光催化作用产生的活性氧也有助于观察到的活性。含有较高比例ZnTiO₃的涂层对细菌生长的抑制作用更明显。含锌涂层降低了70%以上的细胞活力，改变了成纤维细胞的面积和形态。锌的掺入量和微观结构对摩擦磨损性能有影响，tio_2有助于提高耐磨性，zntio_3提高润滑性。

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引用次数: 0

Characterisation and performance of coated SiAlON cutting tools for Inconel 718 machining 用于加工Inconel 718的涂层SiAlON刀具的特性和性能

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

Surface & Coatings Technology

Pub Date : 2026-03-15 Epub Date: 2026-02-05 DOI: 10.1016/j.surfcoat.2026.133265

Beatriz G. Rodrigues , Beatriz Monteiro , Sónia Simões , Ana Reis , Tiago Silva , Bruno Guimarães , Tomás Aires , Cristina M. Fernandes , Daniel Figueiredo

Physical vapor deposition (PVD) with High Power Impulse Magnetron Sputtering (HiPIMS) presents a highly promising surface modification approach for the performance enhancement of SiAlON cutting tools in the machining of Nickel-based superalloys alloys, which are renowned for their challenging machinability. This study systematically investigates the coating roughness, microstructural characteristics, and cutting performance of HiPIMS-coated SiAlON tools in Inconel 718 milling. The deposited multilayer coatings were comprehensively analysed using advanced characterisation techniques, including scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Cutting tests were carried out with different tool geometries and machining conditions, as well as coated and uncoated tools—factors that highly influence tool's performance. The HiPIMS coating demonstrated improved thermal stability and reduced susceptibility to diffusion-related deterioration—factors that are critical in managing the high temperatures encountered in superalloy machining. These results underscore the potential of HiPIMS technology to significantly extend tool longevity and enhance machining efficiency, establishing it as a viable solution for high-performance manufacturing sectors.

物理气相沉积（PVD）与大功率脉冲磁控溅射（HiPIMS）是一种非常有前途的表面改性方法，用于提高SiAlON刀具在镍基高温合金加工中的性能，镍基高温合金以其具有挑战性的可加工性而闻名。本研究系统地研究了hiims涂层SiAlON刀具在Inconel 718铣削中的涂层粗糙度、显微组织特征和切削性能。利用先进的表征技术，包括扫描电子显微镜（SEM）和能量色散x射线光谱（EDS），对沉积的多层涂层进行了全面分析。在不同刀具几何形状和加工条件下，以及对刀具性能影响较大的涂层和未涂层刀具进行了切削试验。HiPIMS涂层表现出更好的热稳定性，并降低了对扩散相关恶化因素的敏感性，而扩散相关恶化因素对于处理高温合金加工中遇到的高温至关重要。这些结果强调了HiPIMS技术在显著延长刀具寿命和提高加工效率方面的潜力，使其成为高性能制造领域的可行解决方案。

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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 : 2026-03-15 Epub 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。

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引用次数: 0

Preparation of MAB phases on carbon fibers as novel damage-tolerant interphases for advanced ceramic matrix composites 在碳纤维上制备MAB相作为先进陶瓷基复合材料新型耐损伤界面相

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

Surface & Coatings Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-10 DOI: 10.1016/j.surfcoat.2026.133186

Feilong Huang , Xiaoyi Jiang , Cheng Fang , Mingliang Li , Jinpeng Zhu , Gang Shao , Hongxia Lu , Hailong Wang

The development of novel interphase materials that can simultaneously enhance energy dissipation and provide oxidation resistance remains a significant challenge for carbon fiber-reinforced ceramic composites operating in high-temperature environments. In this study, first-principles calculations and verification experiments identify MoAlB as a promising interface material with superior damage tolerance and structural stability. MoAlB coatings were successfully prepared on carbon fibers for the first time via magnetron sputtering combining thermal treatment process. MoAlB coatings can retain structural integrity after high-temperature oxidation and rapidly form a protective α-Al₂O₃ scale through Al outward diffusion, confirming the excellent oxygen isolation capability. This primary work can be used as a reference to the design of interphase material for advanced composites under extreme conditions.

开发能够同时增强能量耗散和抗氧化性能的新型界面材料仍然是高温环境下碳纤维增强陶瓷复合材料面临的重大挑战。在本研究中，第一性原理计算和验证实验表明，MoAlB具有优异的损伤容限和结构稳定性，是一种很有前途的界面材料。采用磁控溅射结合热处理工艺，首次在碳纤维表面成功制备了MoAlB涂层。MoAlB涂层在高温氧化后能保持结构的完整性，并通过Al向外扩散迅速形成保护α-Al2O3的水垢，证实了其优异的隔氧能力。这一初步工作可为极端条件下高级复合材料界面材料的设计提供参考。

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 : 2026-03-01 Epub 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。

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引用次数: 0

Thicker the better or thinner: Addressing the dichotomy in the case of MAO coated AZ91 Mg alloy for corrosion protection 越厚越好，或者越薄：解决MAO涂层AZ91镁合金的防腐问题

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

Surface & Coatings Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133215

Phani Chalapaka , Lakshman Neelakantan , Rama Krishna L.

Magnesium alloys, owing to their high specific strength and low density, are promising materials for lightweight structural applications. However, their poor corrosion resistance severely restricts broader industrial use. The present study developed micro-arc oxidation (MAO) coatings on AZ91 magnesium alloy at a constant current density of 0.3 A cm⁻² using silicate–KOH-based electrolytes containing K₂ZrF₆ and NaAlO₂ additives to modulate the ionic conductivity, consequently the coating voltage. The incorporation of K₂ZrF₆ promoted the in-situ formation of ZrO₂, while aluminate addition facilitated the development of hard MgAl₂O₄ and Al₂O₃ phases and stabilized the high-temperature tetragonal ZrO₂ (t-ZrO₂). The synergistic effect of these phases enhanced coating compactness, reduced microcracks, and improved hardness and corrosion resistance, particularly in thinner coatings. Potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) in 3.5 wt% NaCl solution revealed that all the MAO coatings outperformed the corrosion resistance of the bare substrate. Among them, the optimized aluminate-containing electrolyte produced the most compact coating (A3–11), exhibiting approximately six orders of magnitude reduction in corrosion rate and a four-order increase in impedance relative to the bare substrate. The findings demonstrate that tailoring electrolyte composition enables the formation of dense, defect-minimized MAO coatings with superior protection performance on AZ91 magnesium alloy.

镁合金具有高比强度和低密度的特点，是一种很有前途的轻量化结构材料。然而，它们的耐腐蚀性差严重限制了其更广泛的工业应用。在0.3 a cm−2的恒流密度下，利用含有K₂ZrF₆和NaAlO₂添加剂的硅酸盐- koh基电解质调节AZ91镁合金的离子电导率，从而调节涂层电压，制备了微弧氧化（MAO）涂层。K₂ZrF₆的加入促进了ZrO₂的原位形成，而铝酸盐的加入促进了MgAl₂O₄和Al₂O₃相的形成，并稳定了高温正方ZrO₂（t-ZrO₂）。这些相的协同作用增强了涂层的致密性，减少了微裂纹，提高了硬度和耐腐蚀性，特别是在较薄的涂层中。在3.5 wt% NaCl溶液中进行电位动极化和电化学阻抗谱（EIS）分析，结果表明MAO涂层的耐蚀性能优于裸基体。其中，优化后的含铝酸盐电解质产生了最致密的涂层（A3-11），相对于裸衬底，腐蚀速率降低了约6个数量级，阻抗增加了4个数量级。研究结果表明，调整电解质成分可以在AZ91镁合金上形成致密的、缺陷最小化的MAO涂层，并具有优异的保护性能。

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引用次数: 0

In-situ pre-alloying of Ti6Al4V composite coating fabricated by laser melting deposition: Synergistic improvement of microstructure and property 激光熔覆Ti6Al4V复合涂层的原位预合金化：组织和性能的协同改善

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

Surface & Coatings Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133228

Suxin Dong , Bo Li , Wen Li , Yizhe Cao , Linxiang Liu , Chenhui Hu , Shaodi Wang , Dongxu Hui , Wenfei Huang , Katsuyoshi Kondoh , Junko Umeda , Xin Zhang , Shengyin Zhou , Shufeng Li

For laser melting deposited (LMD) Ti-based coatings, rapid solidification of titanium melt promotes the growth of columnar grains aligned along the path of maximum heat dissipation, resulting in the dominant 〈001〉 texture of β phase and the deterioration of surface strength and fracture toughness. Pre-alloying of Ti powders enables in-situ grown nano-reinforcements which can significantly influence the solidification, microstructure and properties of LMD-composites. Here, comparative studies of mixed Ti6Al4V + TiB₂ powder and Ti6Al4V-TiBw composite powder on the columnar-to-equiaxed transition and strengthening efficiency for Ti6Al4V-TiBw composite coatings fabricated by LMD were performed. By a combination of microstructural characterizations, at optimal printing condition, the microstructure of different coatings fabricated using Ti6Al4V, mixed Ti6Al4V + TiB₂ powder and Ti6Al4V-TiBw composite powder displayed a clear transition from coarse columnar grain, semi-columnar, to equiaxed grains with a small portion of dendrites, respectively. With strongly pinning effect of finer TiBw, the ultimate tensile strength of Ti6Al4V-TiBw composite powder coatings increases by ∼100 MPa relative to mixed Ti6Al4V + TiB₂ powder coatings, accompanied with a 2% loss of plasticity. According to fractography analysis, microcracks in the mixed Ti6Al4V + TiB₂ powder coating initiate and propagate through TiBw clusters and alloy matrix, while microcracks in the Ti6Al4V-TiBw composite powder coating initiate at the dendritic structure. More importantly, the underlying mechanism of TiBw introduction strategy on microstructural evolution of composite coating has been discussed based on the phase diagram of TiB and thermodynamics in terms of heterogenous-phase-related convection and undercooling in rapid solidification process.

对于激光熔覆ti基涂层，钛熔体的快速凝固促进了沿最大散热路径排列的柱状晶粒的生长，导致β相织体以< 001 >为主，表面强度和断裂韧性下降。Ti粉末的预合金化使原位生长的纳米增强能够显著影响lmd复合材料的凝固、组织和性能。对比研究了混合Ti6Al4V + TiB2粉末和Ti6Al4V- tibw复合粉末对LMD制备的Ti6Al4V- tibw复合涂层柱状向等轴转变和强化效率的影响。结合显微组织表征，在最佳打印条件下，Ti6Al4V、Ti6Al4V + TiB2混合粉末和Ti6Al4V- tibw复合粉末制备的不同涂层的显微组织分别表现出从粗柱状晶粒、半柱状晶粒到含有少量枝晶的等轴晶粒的明显转变。Ti6Al4V-TiBw复合粉末涂料的抗拉强度比Ti6Al4V + TiB2混合粉末涂料提高了约100 MPa，同时塑性损失2%。断口分析表明，Ti6Al4V + tib2混合粉末涂层中的微裂纹在TiBw团簇和合金基体中萌生并扩展，而Ti6Al4V-TiBw复合粉末涂层中的微裂纹在枝晶组织中萌生并扩展。基于TiBw相图和热力学，从快速凝固过程中与非均相相关的对流和过冷两方面探讨了TiBw引入策略对复合涂层组织演变的潜在机制。

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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 : 2026-03-01 Epub 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。

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引用次数: 0

Microstructure and ablation resistance of HfCN-modified C/C composites prepared via slurry impregnation-assisted reactive melt infiltration 浆料浸渍辅助反应熔体渗透制备hfcn改性C/C复合材料的微观结构及抗烧蚀性能

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

Surface & Coatings Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-22 DOI: 10.1016/j.surfcoat.2026.133219

Yawen Wang , Zhiqiang Liu , Yujun Jia , Ruyi Wan , Ruiyi Su

To improve the tolerance capacity of thermal protection system in ultra-high temperature environment, slurry impregnation-assisted reactive melt infiltration (SIRMI) process was adopted to simultaneously realize the ceramic modification of C/C composites and preparation of HfC_0.54N_0.46 coating. Compared with the in-situ HfC coating, the formed HfC_0.54N_0.46 coating exhibits higher hardness (23.2 GPa) and elastic modulus (240.8 GPa), along with improved toughness reflected by higher H/E and H³/E² values. The HCN sample exhibits lower linear ablation rate of −4.09 μm/s, representing a 14.4% reduction than HC sample (−4.78 μm/s). The enhanced toughness of HCN suppresses the formation of through-thickness cracks during ablation, making the formed oxide sacle consisting of intact outer layer and dense inner layer. This oxide structure endows HCN an advantage in ablation resistance over HC.

为了提高热防护体系在超高温环境下的耐受性，采用浆料浸渍辅助反应熔体渗透（SIRMI）工艺，同时实现了C/C复合材料的陶瓷改性和HfC0.54N0.46涂层的制备。与原位HfC涂层相比，形成的HfC0.54N0.46涂层具有更高的硬度（23.2 GPa）和弹性模量（240.8 GPa），同时具有更高的H/E和H3/E2值，从而提高了韧性。HCN样品的线性烧蚀速率为- 4.09 μm/s，比HC样品（- 4.78 μm/s）降低了14.4%。HCN韧性的增强抑制了烧蚀过程中贯通裂纹的形成，使形成的氧化团由完整的外层和致密的内层组成。这种氧化物结构使HCN在抗烧蚀方面优于HC。

引用次数: 0

Thermal control performance and corrosion resistance of laser-assisted PEO ceramic coatings on LA141 magnesium‑lithium alloy LA141镁锂合金激光辅助PEO陶瓷涂层的热控制性能和耐蚀性

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

Surface & Coatings Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133233

Guolong Wu , Chen Liu , Lin Li , Yanyi Yin , Zhenzhen Yang , Ye Wang , Chen Wen , Jianhua Yao

This study successfully developed a black thermal control ceramic coating on the surface of a magnesium‑lithium alloy, exhibiting an absorption rate exceeding 0.85 in the 250–2500 nm wavelength range and an emissivity higher than 0.85 in the 2.5–16 μm range. The coating was prepared by introducing NaVO₃ as a colouring agent and employing a combined laser-assisted plasma electrolytic oxidation (Laser/PEO) process. Employing high-speed imaging, SEM, EDS, GDOES, XRD and XPS analyses, the plasma discharge behaviour, coating morphology, and elemental composition were systematically investigated, alongside evaluations of thermal control performance and corrosion resistance. Results indicate that laser irradiation not only induces plasma discharge in the anodic region but also reduces discharge channel dimensions, thereby mitigating structural defects and refining microstructure. Furthermore, the coating exhibited a significant increase in the content of the black phase V₂O₃ and the corrosion-resistant phase Mg₂SiO₄, alongside simultaneous improvements in coating thickness and density. These factors collectively enhanced both the absorption and emission rates. The study demonstrates that the Laser/PEO composite process can concurrently enhance the thermal control performance and anti-corrosion properties of the coating, offering a novel approach for multifunctional surface protection of magnesium‑lithium alloys.

本研究成功地在镁锂合金表面制备了一种黑色热控陶瓷涂层，在250 ~ 2500 nm波长范围内的吸收率超过0.85，在2.5 ~ 16 μm波长范围内的发射率高于0.85。该涂层以NaVO3为着色剂，采用激光辅助等离子体电解氧化（Laser/PEO）复合工艺制备。通过高速成像、SEM、EDS、GDOES、XRD和XPS分析，系统地研究了等离子体放电行为、涂层形貌和元素组成，同时评估了热控制性能和耐腐蚀性。结果表明，激光辐照不仅在阳极区诱导等离子体放电，而且减小了放电通道尺寸，从而减轻了组织缺陷，细化了微观组织。此外，涂层的黑色相V2O3和耐腐蚀相Mg2SiO4的含量显著增加，同时涂层的厚度和密度也有所提高。这些因素共同提高了吸收率和排放率。研究表明，激光/PEO复合工艺可以同时提高涂层的热控制性能和抗腐蚀性能，为镁锂合金的多功能表面保护提供了一种新的途径。

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引用次数: 0