Surface & Coatings Technology最新文献_第6页

Adhesion of DLC-based coatings on LPBF Al-Si-Mg alloys: influence of substrate hardness dlc基涂层在LPBF Al-Si-Mg合金上的附着力：基体硬度的影响

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

Surface & Coatings Technology

Pub Date : 2026-01-19 DOI: 10.1016/j.surfcoat.2026.133203

Maria Francesca Bonilauri , Emanuele Ghio , Giovanni Bolelli , Bertè Alessandro , Emanuela Cerri

The microstructure and mechanical properties of Laser-Powder Bed Fusion (LPBF)-manufactured Al alloys can be tailored through heat treatments. To study how this affects the mechanical support offered to DLC-based thin films, we studied the adhesion of a DLC-based coating onto LPBF AlSi7Mg and AlSi10Mg alloys in four different conditions: as-built, directly aged, solution-treated, and T6 (solutionized and aged). Notably, the solution-treated substrates were harder than the T6 ones after coating due to precipitation during the deposition process itself, whilst the T6 substrates experienced over-aging.

The fraction of delaminated coating area in the Rockwell indentation test increased and the delamination load in the scratch test decreased when the heat treatment reduced the hardness of the substrate and altered the eutectic Si network produced by the LPBF process. During ball-on-disc sliding wear tests, all substrates, including the as-built ones, deformed plastically under the contact stress. The DLC top layer, with its high H/E ratio, could follow such deformation, but the underlying W-C:H intermediate layer cracked and caused localized spallation of the film, with increased severity on softer substrates. If the wear track passed through an open pore on the LPBF substrate, the additional stress concentration produced an even larger spallation or, with the directly aged or solutionized substrates, a complete delamination. Thus, a softened substrate, coupled with the typical defects of LPBF materials, worsened the repeatability of the sliding behaviour. After the T6 treatment, further reduction in hardness caused the film to delaminate systematically under the chosen test conditions.

激光粉末床熔合（LPBF）铝合金的显微组织和力学性能可以通过热处理来定制。为了研究这如何影响dlc基薄膜的机械支撑，我们研究了dlc基涂层在四种不同条件下对LPBF AlSi7Mg和AlSi10Mg合金的附着力：构建、直接时效、固溶处理和T6（固溶和时效）。值得注意的是，固溶处理的基板由于沉积过程本身的沉淀，涂层后比T6基板更硬，而T6基板则经历了过老化。热处理降低了基体硬度，改变了LPBF工艺产生的共晶Si网络，使洛氏压痕试验中脱层涂层面积增大，划痕试验中脱层载荷减小。在球对盘滑动磨损试验中，所有基板，包括成品基板，在接触应力作用下发生塑性变形。由于高H/E比，DLC顶层可以遵循这种变形，但下层的W-C:H中间层破裂并导致薄膜局部剥落，并且在较软的衬底上严重程度增加。如果磨损轨迹穿过LPBF基板上的开放孔，则额外的应力集中会产生更大的剥落，或者对于直接老化或溶解的基板，会产生完全的分层。因此，一个软化的基材，加上LPBF材料的典型缺陷，恶化了滑动行为的可重复性。经过T6处理后，硬度的进一步降低导致薄膜在选定的测试条件下系统地分层。

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引用次数: 0

Core–shell NbTiC@M23C6 carbides embedded in an in-situ M2B network: A quasi-continuous protective architecture for laser-clad Fe-based composite coatings 嵌入原位M2B网络中的核壳NbTiC@M23C6碳化物：激光熔覆铁基复合涂层的准连续保护结构

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

Surface & Coatings Technology

Pub Date : 2026-01-19 DOI: 10.1016/j.surfcoat.2026.133197

Zhiqing Tang , Xiao Liang , Wenlong Jiang , Zijian Wang , Chongchen Xiang , Hanlin Ding , Youtian Shen , Yuan Gao , Xuan Yao

Constructing a microstructurally stable, load-bearing reinforcement architecture is critical for improving the wear resistance and thermal stability of laser-clad Fe-based coatings. In this study, laser cladding technology is used to create a specialized network structure, where the M₂B-type boride network acts as the supporting framework, and high-hardness core-shell (NbTiC@M₂₃C₆) composite carbides serve as the reinforcing phase. The results show that, at room temperature, the core-shell structure stabilizes the interface between the carbide and the matrix, effectively reducing both adhesive and abrasive wear. The M₂B network, with its high hardness, further enhances the wear resistance by providing robust structural support. At elevated temperatures, the M₂B network is associated with the formation of a stable Cr₂O₃ oxide layer, reducing oxidation wear and improving high-temperature stability. The core-shell composite carbides, with their high hardness, provide additional structural support, helping to maintain the integrity of the coating under thermal stress. The synergistic effects of the M₂B boride network and core-shell composite carbides significantly improve the wear resistance and thermal stability of the coating, making it promising for high-temperature tribological applications with long-lasting durability in demanding environments.

构建微观结构稳定、承载的增强结构对于提高激光熔覆铁基涂层的耐磨性和热稳定性至关重要。本研究采用激光熔覆技术，以m2b型硼化物网络作为支撑框架，以高硬度核壳复合碳化物（NbTiC@M23C6）作为增强相，构建了专门的网络结构。结果表明，在室温下，核壳结构稳定了碳化物与基体之间的界面，有效地减少了粘着磨损和磨粒磨损。M2B网络具有高硬度，通过提供坚固的结构支撑进一步增强耐磨性。在高温下，M2B网络能形成稳定的Cr2O3氧化层，减少氧化磨损，提高高温稳定性。核壳复合碳化物具有高硬度，提供额外的结构支撑，有助于在热应力下保持涂层的完整性。M2B硼化物网络和核壳复合碳化物的协同作用显著提高了涂层的耐磨性和热稳定性，使其有望在苛刻的环境中具有持久耐用的高温摩擦学应用。

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引用次数: 0

Shot peening-based hybrid surface treatment for enhancing wear and electrochemical properties of Ti-12.1Mo-1Fe alloy 喷丸强化复合表面处理提高Ti-12.1Mo-1Fe合金的磨损性能和电化学性能

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

Surface & Coatings Technology

Pub Date : 2026-01-19 DOI: 10.1016/j.surfcoat.2026.133206

Seung-Woo Lee , Dong-Geun Lee

Titanium alloys offer high specific strength, corrosion resistance, and fatigue performance, but their poor wear resistance limits use in severe-friction environments. This study investigates the effect of shot peening (SP) pretreatment on the gas nitriding (GN) efficiency of a β-Ti-12.1Mo-1Fe alloy. Four surface conditions were examined: homogenization treatment (HT), SP, GN, and SP + GN. SP introduced severe plastic deformation and ultrafine grains near the surface, which significantly enhanced nitrogen diffusion during GN. X-ray diffraction and electron backscatter diffraction analyses confirmed an increased TiN phase fraction and higher dislocation density in the SP + GN condition. The surface hardness reached 1170 HV_0.1, and the diffusion layer thickness increased by 63% compared with that of the GN sample. Wear tests showed that the SP + GN sample exhibited the highest wear resistance, reducing wear track width and depth by 35% and 55%, respectively, relative to HT. Although SP increased surface roughness, the resulting craters helped trap wear debris and lowered the friction coefficient. Electrochemical tests in a 3.5 wt% NaCl solution revealed that the SP + GN treatment provided superior corrosion resistance due to compressive residual stress and the formation of stable nitride layers. Overall, SP pretreatment effectively enhances nitriding efficiency and improves wear and electrochemical performances of β‑titanium alloys.

钛合金具有较高的比强度、耐腐蚀性和抗疲劳性能，但其较差的耐磨性限制了在严重摩擦环境中的使用。研究了喷丸强化（SP）预处理对β-Ti-12.1Mo-1Fe合金气体氮化效率的影响。研究了四种表面条件：均质处理（HT）、SP、GN和SP + GN。在GN过程中，SP在表面附近引入了严重的塑性变形和超细晶粒，显著增强了氮的扩散。x射线衍射和电子背散射衍射分析证实了SP + GN条件下TiN相分数和位错密度的增加。表面硬度达到1170 HV0.1，扩散层厚度较GN样品增加63%。磨损试验表明，SP + GN样品具有最高的耐磨性，与HT相比，磨损轨迹宽度和深度分别减少了35%和55%。虽然SP增加了表面粗糙度，但产生的陨石坑有助于捕获磨损碎片并降低摩擦系数。在3.5 wt% NaCl溶液中的电化学测试表明，SP + GN处理由于压缩残余应力和稳定氮化物层的形成而具有优异的耐腐蚀性。综上所述，SP预处理有效地提高了β‑钛合金的氮化效率，改善了其磨损性能和电化学性能。

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引用次数: 0

Silicon-induced self-healing in YSZ thermal barrier coatings with enhanced thermal shock and hot-corrosion resistance YSZ热障涂层中硅诱导的自愈，增强了热冲击和耐热腐蚀性能

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

Surface & Coatings Technology

Pub Date : 2026-01-19 DOI: 10.1016/j.surfcoat.2026.133204

A. Khazaee , S.M.M. Hadavi , N. NayebPashaee

This study investigates the improvement of thermal shock resistance and hot corrosion performance in yttria-stabilized zirconia (YSZ)-based thermal barrier coatings (TBCs) by incorporating silicon (Si) and developing multi-layered coating architectures. Coatings were applied through atmospheric plasma spraying (APS), by which three distinct coating designs were evaluated: a conventional YSZ coating, a single-layer self-healing coating (YSZ + 13 wt% Si), and a double-layer self-healing coating (8YSZ + 7 wt% Si / 8YSZ + 13 wt% Si). The addition of silicon promoted the formation of silica (SiO₂) and zircon silicate (ZrSiO₄) phases upon oxidation, providing an autonomous self-healing mechanism that seals microcracks and improves the structural integrity and durability of the coatings during thermal cycling. Microstructural analysis revealed that the double-layer self-healing coating exhibited superior damage tolerance, with enhanced stress accommodation and more effective crack healing compared to the single-layer self-healing coating. Thermal shock testing revealed that the multi-layer architecture outperformed the single-layer coating, exhibiting reduced spallation and crack propagation. Additionally, hot corrosion tests showed that the silicon-enriched coatings offered improved protection against degradation, with the double-layer self-healing system providing the highest corrosion resistance. This study highlights the crucial role of silicon concentration and coating architecture in optimizing the self-healing capabilities and overall performance of YSZ-based TBCs for advanced high-temperature applications in the turbine and aerospace industries.

本研究通过添加硅（Si）和开发多层涂层结构，研究了钇稳定氧化锆（YSZ）基热障涂层（tbc）的抗热震性能和热腐蚀性能。涂层通过大气等离子喷涂（APS）进行，通过该方法评估了三种不同的涂层设计：传统的YSZ涂层，单层自修复涂层（YSZ + 13% Si）和双层自修复涂层（8YSZ + 7% Si / 8YSZ + 13% Si）。硅的加入促进了氧化过程中二氧化硅（SiO₂）和锆硅（ZrSiO₄）相的形成，提供了一种自主自愈机制，可以密封微裂纹，提高涂层在热循环过程中的结构完整性和耐久性。微观结构分析表明，与单层自愈涂层相比，双层自愈涂层具有更强的损伤容忍度、更强的应力调节能力和更有效的裂纹愈合能力。热冲击测试表明，多层结构优于单层涂层，表现出更少的剥落和裂纹扩展。此外，热腐蚀测试表明，富硅涂层提供了更好的抗降解保护，双层自修复系统提供了最高的耐腐蚀性。这项研究强调了硅浓度和涂层结构在优化基于ysz的tbc的自修复能力和整体性能方面的关键作用，该tbc可用于涡轮和航空航天工业的高级高温应用。

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引用次数: 0

Electrochemically enhanced uniform TiO₂ films on TA1 titanium via stepwise anodizing: Decoupling grain-orientation effects and corrosion-resistance mechanisms 逐步阳极氧化在TA1钛上增强均匀tio2膜：去耦晶粒取向效应及耐蚀机理

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

Surface & Coatings Technology

Pub Date : 2026-01-17 DOI: 10.1016/j.surfcoat.2025.133120

Qiang Zhong , Changrong Ran , zhengjie Chen , Xueqiang Dong , Zeyao Zeng , Xu Luo , Wei Li , Jin Na , Lu Wang , Jinwen Ye

This study elucidated the critical roles of grain orientation and microstructural homogeneity in governing the growth, uniformity, and electrochemical corrosion resistance of anodizing TiO₂ films on TA1 titanium. Recrystallized TA1, with a nearly uniform grain structure (median grain-size deviation ≈0.61 μm), exhibited low color difference (

ΔE

≈ 0.46–0.56) and stable interference colors over 50–110 V, whereas phase-transformed TA1, with a ∼ 20-fold larger median deviation (≈65.71 μm), contained coarse, anisotropic grains that caused pronounced color non-uniformity. Further investigations confirmed that a 2093 mV surface potential difference between

(11 \bar{2} 0) (0001)

and

(0001) (11 \bar{2} 0)

grains tilted 45° along the TD direction dictated localized discharge dynamics, directly resulting in a 46.7 nm thickness disparity (107.6 nm purple vs. 154.3 nm yellow layers) under 70 V anodizing. This orientation-dependent thickness contrast mechanistically explained the macroscopic color demarcation through interference principles. To eliminate these variations, a stepwise anodizing strategy was developed, in which secondary anodizing was used to redistribute the electric potential and promote preferential growth in thinner-film regions, thereby markedly enhancing TiO₂ film uniformity. Electrochemical tests in seawater showed that such uniform films exhibited higher low-frequency impedance and a higher barrier-layer resistance R_m (457–3248 Ω·cm²), thereby affording superior corrosion resistance. These findings not only clarified the mechanism of anisotropic anodizing behavior but also provided a practical approach to fabricate uniform, highly protective, and functional titanium surfaces for marine and biomedical applications.

本研究阐明了晶粒取向和微观组织均匀性在TA1钛上阳极氧化tio2膜生长、均匀性和电化学耐蚀性中的关键作用。再结晶的TA1晶粒结构接近均匀（晶粒尺寸中值偏差≈0.61 μm），在50-110 V范围内色差较小（ΔE≈0.46-0.56），干涉色稳定，而相变的TA1晶粒粗且各向异性，其中值偏差约为20倍（≈65.71 μm），导致颜色不均匀。进一步的研究证实，沿TD方向倾斜45°的112¯00001和0001112¯0晶粒之间的2093 mV表面电位差决定了局部放电动力学，直接导致在70 V阳极氧化下46.7 nm的厚度差异（107.6 nm紫色层对154.3 nm黄色层）。这种依赖于取向的厚度对比通过干涉原理机械地解释了宏观的颜色划分。为了消除这些变化，开发了一种逐步阳极氧化策略，其中使用二次阳极氧化来重新分配电位并促进薄膜较薄区域的优先生长，从而显着提高TiO 2薄膜的均匀性。在海水中的电化学测试表明，这种均匀膜具有较高的低频阻抗和较高的阻挡层电阻Rm (457-3248 Ω·cm2)，具有较好的耐腐蚀性。这些发现不仅阐明了各向异性阳极氧化行为的机理，而且为海洋和生物医学应用提供了一种制备均匀、高保护性和功能性钛表面的实用方法。

{"title":"Electrochemically enhanced uniform TiO₂ films on TA1 titanium via stepwise anodizing: Decoupling grain-orientation effects and corrosion-resistance mechanisms","authors":"Qiang Zhong , Changrong Ran , zhengjie Chen , Xueqiang Dong , Zeyao Zeng , Xu Luo , Wei Li , Jin Na , Lu Wang , Jinwen Ye","doi":"10.1016/j.surfcoat.2025.133120","DOIUrl":"10.1016/j.surfcoat.2025.133120","url":null,"abstract":"<div><div>This study elucidated the critical roles of grain orientation and microstructural homogeneity in governing the growth, uniformity, and electrochemical corrosion resistance of anodizing TiO₂ films on TA1 titanium. Recrystallized TA1, with a nearly uniform grain structure (median grain-size deviation ≈0.61 μm), exhibited low color difference (<span><math><mi>ΔE</mi></math></span> ≈ 0.46–0.56) and stable interference colors over 50–110 V, whereas phase-transformed TA1, with a ∼ 20-fold larger median deviation (≈65.71 μm), contained coarse, anisotropic grains that caused pronounced color non-uniformity. Further investigations confirmed that a 2093 mV surface potential difference between <span><math><mfenced><mrow><mn>11</mn><mover><mn>2</mn><mo>¯</mo></mover><mn>0</mn></mrow></mfenced><mfenced><mn>0001</mn></mfenced></math></span> and <span><math><mfenced><mn>0001</mn></mfenced><mfenced><mrow><mn>11</mn><mover><mn>2</mn><mo>¯</mo></mover><mn>0</mn></mrow></mfenced></math></span>grains tilted 45° along the TD direction dictated localized discharge dynamics, directly resulting in a 46.7 nm thickness disparity (107.6 nm purple vs. 154.3 nm yellow layers) under 70 V anodizing. This orientation-dependent thickness contrast mechanistically explained the macroscopic color demarcation through interference principles. To eliminate these variations, a stepwise anodizing strategy was developed, in which secondary anodizing was used to redistribute the electric potential and promote preferential growth in thinner-film regions, thereby markedly enhancing TiO₂ film uniformity. Electrochemical tests in seawater showed that such uniform films exhibited higher low-frequency impedance and a higher barrier-layer resistance R<sub>m</sub> (457–3248 Ω·cm<sup>2</sup>), thereby affording superior corrosion resistance. These findings not only clarified the mechanism of anisotropic anodizing behavior but also provided a practical approach to fabricate uniform, highly protective, and functional titanium surfaces for marine and biomedical applications.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"523 ","pages":"Article 133120"},"PeriodicalIF":6.1,"publicationDate":"2026-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996319","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

Dry sliding wear resistance evaluation of cathodic arc-PVD Cr/CrN multilayer coatings deposited on AISI 4140 nitrided and non-nitrided steel AISI 4140氮化和非氮化钢表面阴极电弧- pvd Cr/CrN多层涂层干滑动磨损性能评价

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

Surface & Coatings Technology

Pub Date : 2026-01-17 DOI: 10.1016/j.surfcoat.2026.133202

A. Justina Maskavizan , Eugenia L. Dalibon , Germán Prieto , Walter R. Tuckart , Adriana B. Márquez , Sonia P. Brühl

PVD CrN coatings are extensively used to improve the wear resistance of medium-alloy steels. A reliable assessment of their industrial performance requires comparative analysis of sliding conditions and investigation of the role of substrate pre-treatments. The main goals of this work were to study the effect of plasma nitriding and in situ surface cleaning methods on multilayer Cr/CrN arc-PVD coating adhesion and wear behaviour under unidirectional and reciprocating motion. Nitrided and non-nitrided AISI 4140 steel were used as substrates. Two pre-cleaning methods, Ar + H₂ glow discharge and chromium ion etching, were studied. Microstructural characterization was performed using X-ray diffraction, nanoindentation and FIB-SEM. Adhesion was evaluated under static and dynamic loading conditions. Wear performance was assessed using unidirectional pin-on-disk and reciprocating ball-on-flat tests. Results reveal that adhesion is influenced by the pre-cleaning process in the PVD chamber and that the increase of substrate hardness achieved through plasma nitriding doubles the coating's critical load in scratch tests. Under reciprocating sliding at 1.4 GPa, coatings on non-nitrided steel failed after only a few cycles, whereas coatings on nitrided substrates suffered only polishing-like wear. However, in unidirectional tests under a Hertzian pressure of 1.5 GPa, even though coating delamination occurred, prior nitriding of the steel reduced the worn volume. Overall, results demonstrate that choosing the best combination of substrate treatments to achieve good adhesion is crucial to extend the durability of the coatings especially under reciprocating motion and high Hertzian pressures.

PVD CrN涂层广泛用于提高中合金钢的耐磨性。对其工业性能的可靠评估需要对滑动条件进行比较分析，并对基材预处理的作用进行调查。本研究的主要目的是研究等离子体氮化和原位表面清洗方法对多层Cr/CrN电弧- pvd涂层在单向和往复运动下的粘附和磨损行为的影响。采用渗氮和非渗氮AISI 4140钢作为基体。研究了Ar + H₂辉光放电和铬离子刻蚀两种预清洗方法。采用x射线衍射、纳米压痕和FIB-SEM对样品进行了微结构表征。在静态和动态加载条件下评估附着力。磨损性能评估采用单向销盘和往复式球平试验。结果表明，PVD腔室的预清洗过程影响了涂层的附着力，等离子体氮化提高了涂层的硬度，使涂层在划痕试验中的临界载荷增加了一倍。在1.4 GPa的往复滑动下，非氮化钢的涂层仅在几个循环后失效，而氮化基体的涂层仅遭受抛光样磨损。然而，在1.5 GPa赫兹压力下的单向试验中，即使发生了涂层分层，钢的预先氮化也减少了磨损体积。总的来说，结果表明，选择最佳的基材处理组合来获得良好的附着力对于延长涂层的耐久性至关重要，特别是在往复运动和高压下。

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引用次数: 0

Aging strengthening and interface self–healing of cold–sprayed CuCrZr alloy coatings CuCrZr合金冷喷涂涂层的时效强化与界面自愈

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

Surface & Coatings Technology

Pub Date : 2026-01-16 DOI: 10.1016/j.surfcoat.2026.133196

Yuxin Jue , Jiayi He , Zikai Wu , Chen Wang , Jing Lu , Fenghua Luo

The cold–sprayed CuCrZr alloy coating was peeled off from the substrate, and the effects of annealing at 450 °C for 60 min on its microstructure, mechanical properties and thermal conductivity were studied. The results indicate that severe deformation occurs near the particle–particle interface, leading to the formation of nanocrystals. The deformation hardening of particles leads to an increase in the hardness of the cold–sprayed coating. Compared with the as–built CuCrZr alloy obtained by selective laser melting, the hardness of the cold–sprayed CuCrZr alloy increases by approximately 87% from 84 HV0.1 to 157 HV0.1. The pores and weak interfaces between mechanically interlocked particles lead to the brittleness of the coating. However, annealing can repair nanoscale pores and self–healing particle–particle interface bonding, and the precipitation of Cr–rich phase leads to aging strengthening, thereby improving the tensile strength and thermal conductivity of CuCrZr coatings. After annealing, the hardness, tensile strength, and thermal conductivity of the coating are all improved. Specifically, the hardness increased from 157 HV0.1 to 223 HV0.1, an increase of approximately 42%; The tensile strength increased from 61 MPa to 170 MPa, an increase of approximately 179%; The thermal conductivity increased from 91 W/(m·K) to 217 W/(m·K), an increase of 138%.

将冷喷涂CuCrZr合金涂层从基体上剥离，研究了450℃60 min退火对涂层组织、力学性能和导热性能的影响。结果表明，颗粒-颗粒界面附近发生剧烈变形，导致纳米晶体的形成。颗粒的变形硬化导致冷喷涂涂层硬度的提高。与选择性激光熔化制备的CuCrZr合金相比，冷喷涂CuCrZr合金的硬度从84 HV0.1提高到157 HV0.1，提高了约87%。机械互锁颗粒之间的孔隙和弱界面导致涂层脆性。而退火可以修复纳米级孔隙和自愈颗粒-颗粒界面键合，富cr相的析出导致时效强化，从而提高CuCrZr涂层的抗拉强度和导热系数。退火后涂层的硬度、抗拉强度、导热系数均有提高。硬度从157 HV0.1提高到223 HV0.1，提高了约42%；抗拉强度由61 MPa提高到170 MPa，提高了约179%；导热系数由91 W/（m·K）提高到217 W/(m·K)，提高了138%。

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引用次数: 0

Corrigendum to “Study on the energy of nitrogen-containing borate ester organomolybdenum additives combined with ZDDP” [Surf. Coat. Technol. 522 (2026) 133152] 《含氮硼酸酯类有机钼添加剂与ZDDP复合的能量研究》的勘误[j]。外套。科技。522 (2026)133152]

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

Surface & Coatings Technology

Pub Date : 2026-01-16 DOI: 10.1016/j.surfcoat.2026.133183

Hongping Qiu , Wenbin Hu , Jingzhou Liu , Longhai Li , Sifan Jiang , Keyi Bao , Sheng Han , Jincan Yan

引用次数: 0

Improvement in electrochemical behaviour of Ti-6Al-4V alloy by ultrasonic-assisted abrasive peening 超声辅助磨料强化对Ti-6Al-4V合金电化学性能的改善

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

Surface & Coatings Technology

Pub Date : 2026-01-16 DOI: 10.1016/j.surfcoat.2026.133198

S.V.V.N. Siva Rao , Darothi Bairagi , Sumantra Mandal , N.D. Chakladar , Soumitra Paul

In a physiological environment, corrosion resistance and prolonged durability of a biomedical component are crucial. Hence, metallic materials exhibiting surface deformation with minimal change in surface roughness are preferred. Ultrasonic-assisted abrasive peening (UAP) is a process that can treat a metallic material to render the above characteristics. Furthermore, UAP is an emerging technique that has been under investigation over the past decade. As a result, research on this technique is still evolving, and its influence on the electrochemical behaviour of Ti-6Al-4V alloy has not yet been reported. Therefore, this study attempted to investigate its impact by treating the Ti-6Al-4V samples for 0 (unpeened), 1, 3, and 6 min. The peened samples exhibited significant residual stresses, reaching 70%, 80%, and 84% of the yield strength, while maintaining roughness of 22.6 nm, 28.4 nm, and 32 nm with increase in peening duration. Peening improved surface wettability, reducing the contact angle from 64.4^o in the unpeened sample to 33.4°, 41°, and 49.2° for peening durations of 1, 3, and 6 min, respectively. Further, transmission electron microscopy depicted a nano-grain structure of 56.6 nm and 30.5 nm corresponding to 1 min and 3 min of peening. The electrochemical studies showed an improvement in breakdown potential with peening duration. Specifically, the 6 min peening exhibited the highest potential of 2.45 V, while the unpeened sample had a 1.95 V breakdown potential. The study concluded that a UAP treatment can tailor the microstructure and improve the pitting resistance of Ti-6Al-4V alloy.

在生理环境中，生物医学部件的耐腐蚀性和持久耐用性至关重要。因此，表现出表面变形且表面粗糙度变化最小的金属材料是优选的。超声辅助磨料强化（UAP）是一种处理金属材料使其具有上述特性的工艺。此外，UAP是一种新兴技术，在过去十年中一直在研究中。因此，该技术的研究仍在不断发展，其对Ti-6Al-4V合金电化学行为的影响尚未见报道。因此，本研究试图通过处理Ti-6Al-4V样品0（未打开）、1、3和6分钟来研究其影响。随着喷丸时间的延长，喷丸样品的残余应力显著，分别达到屈服强度的70%、80%和84%，粗糙度分别保持在22.6 nm、28.4 nm和32 nm。喷丸改善了表面润湿性，在喷丸持续时间为1、3和6分钟时，将未喷丸样品的接触角从64.40°降低到33.4°、41°和49.2°。此外，透射电子显微镜显示了56.6 nm和30.5 nm的纳米颗粒结构，对应于1 min和3 min的强化。电化学研究表明，随着喷丸时间的延长，击穿电位有所提高。具体来说，6分钟喷丸处理的样品击穿电位最高，为2.45 V，而未喷丸处理的样品击穿电位为1.95 V。研究结果表明，UAP处理可以使Ti-6Al-4V合金的显微组织更加个性化，提高其抗点蚀性能。

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引用次数: 0

Thermal stability and tribological properties of HiPIMS Cr2O3 coatings with varied pulse widths 不同脉冲宽度下hiims Cr2O3涂层的热稳定性和摩擦学性能

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

Surface & Coatings Technology

Pub Date : 2026-01-15 DOI: 10.1016/j.surfcoat.2026.133201

Jiale Weng, Zhiqiang Ye, Yu X. Xu, Dongsen Geng, Qimin Wang

Wear-resistant oxide coatings play an important role in protecting the surfaces of tools and components. The fabrication of hard oxides using advanced physical vapor deposition techniques has recently attracted considerable attention. In this work, Cr₂O₃ coatings, with a Cr transition layer, were deposited by high-power impulse magnetron sputtering at different pulse widths, and their structure, thermal stability, and tribological properties were investigated. All Cr₂O₃ coatings demonstrate columnar grain growth with a thermodynamically stable hexagonal structure. A pulse width of 70 μs at a constant frequency of 500 Hz yields a peak current of 500 A, resulting in a hardness of 27.2 GPa, which is superior to that achieved at 100 and 280 μs. Decreasing the pulse width to 35 μs at 1500 Hz gives rise to a maximum hardness of 29.3 GPa. The hardness of Cr₂O₃ coatingsincreases upon annealing in air at 800 and 900 °C. Notable grain coarsening, along with increased porosity, leads to a decrease in hardness at 1000 and 1100 °C. The hardness at 1100 °C decreased by 3.5 to 4.7 GPa compared to that at 900 °C. The friction coefficients of the examined Cr₂O₃ range from 0.32 to 0.36 at ambient temperature and diminish to 0.26 to 0.28 at 600 °C. At ambient temperature, Cr₂O₃ coatings, including that deposited at a high pulse width of 280 μs, show outstanding wear resistance, with the specific wear rate below 2 × 10⁻⁷ mm³/N∙m. Nonetheless, certain coatings exhibit severe localized wear at 600 °C, with cracking inside wear tracks. This reduced wear resistance is likely attributable to the inherent brittleness of Cr₂O₃ and the inconsistency in deformation with the underlying Cr.

耐磨氧化物涂层在保护工具和部件表面方面起着重要作用。近年来，利用先进的物理气相沉积技术制备硬质氧化物引起了人们的广泛关注。采用高功率脉冲磁控溅射技术，在不同脉冲宽度下制备了Cr过渡层的Cr2O3涂层，并对其结构、热稳定性和摩擦学性能进行了研究。所有Cr2O3涂层均表现为柱状晶粒生长，具有热力学稳定的六边形结构。当脉冲宽度为70 μs，频率为500 Hz时，峰值电流为500 A，硬度为27.2 GPa，优于100 μs和280 μs时的硬度。在1500 Hz下，将脉冲宽度减小到35 μs，最大硬度为29.3 GPa。在800和900℃的空气中退火后，Cr2O3涂层的硬度增加。在1000℃和1100℃时，晶粒明显变粗，孔隙率增加，导致硬度下降。与900℃时相比，1100℃时的硬度降低了3.5 ~ 4.7 GPa。Cr2O3的摩擦系数在常温下为0.32 ~ 0.36，在600℃时为0.26 ~ 0.28。室温下，Cr2O3涂层表现出优异的耐磨性，比磨损率低于2 × 10−7 mm3/N∙m。然而，某些涂层在600°C时表现出严重的局部磨损，并在磨损轨迹内出现裂纹。这种降低的耐磨性可能是由于Cr2O3的固有脆性和变形与底层Cr的不一致。

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