Surface & Coatings Technology最新文献_第4页

Thermal stability, oxidation resistance, and mechanical properties of CVD TiB0.19C0.37N0.44 hard coating CVD TiB0.19C0.37N0.44硬质涂层的热稳定性、抗氧化性和力学性能

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

Surface & Coatings Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133226

Fangfang Zeng , Lianchang Qiu , Liying Wu , Jifei Zhu , Wei Cheng , Jin Wen , Yong Du , Xiaoshan Zeng

Nanocomposite TiBCN coatings are promising advanced materials owing to their high hardness, wear resistance, and corrosion resistance. This study investigated the thermal stability and oxidation resistance of a TiB_0.19C_0.37N_0.44 coating deposited on WC-Co cemented carbide by chemical vapor deposition (CVD). The as-deposited TiB_0.19C_0.37N_0.44 coating consisted of nanocrystalline Ti(C,N) and Ti(B,C) phases embedded in an amorphous CN/BN matrix. The incorporation of B atoms into the TiCN coating induced the formation of stacking faults, and the hardness of the TiB_0.19C_0.37N_0.44 coating reached 39.1 GPa. The coating maintained its original phase structure after vacuum annealing at temperatures up to 1200 °C. At 1300 °C, B atoms reacted with the WC-Co substrate to form the CoWB phase. With increasing vacuum annealing temperature, the coating hardness decreased continuously. This behavior is attributed to stress release, grain coarsening, B atom diffusion, and degradation of the nanocomposite structure. During oxidation, the coating exhibited a relatively slow oxidation rate at 600–700 °C. However, after oxidation at 800 °C, the reaction of C and B atoms with oxygen led to the formation and volatilization of CO and B₂O₃, generating pores and microcracks. In summary, the TiB_0.19C_0.37N_0.44 coating maintains a stable phase structure after vacuum annealing below 1300 °C, whereas it undergoes complete oxidation after air annealing at 900 °C. These findings indicate that the TiB_0.19C_0.37N_0.44 coating possesses considerable potential for high-temperature cutting applications.

纳米复合TiBCN涂层具有较高的硬度、耐磨性和耐腐蚀性，是一种很有前途的先进材料。研究了化学气相沉积法（CVD）在WC-Co硬质合金表面沉积TiB0.19C0.37N0.44涂层的热稳定性和抗氧化性。沉积的TiB0.19C0.37N0.44涂层由纳米晶Ti（C，N）和Ti（B，C）相嵌套在无定形CN/BN基体中。TiB0.19C0.37N0.44涂层的硬度达到39.1 GPa， B原子掺入TiB0.19C0.37N0.44涂层形成层错。在1200℃真空退火后，涂层保持了原有的相结构。在1300℃时，B原子与WC-Co底物反应形成CoWB相。随着真空退火温度的升高，涂层硬度不断降低。这种行为归因于应力释放、晶粒粗化、B原子扩散和纳米复合材料结构的降解。在氧化过程中，涂层在600 ~ 700℃表现出相对缓慢的氧化速率。但在800℃氧化后，C和B原子与氧反应，导致CO和B2O3的形成和挥发，产生孔洞和微裂纹。综上所述，TiB0.19C0.37N0.44涂层在1300℃以下真空退火后保持了稳定的相结构，而在900℃空气退火后则完全氧化。这些结果表明，TiB0.19C0.37N0.44涂层具有相当大的高温切削应用潜力。

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引用次数: 0

Strengthening mechanisms in CoCrFeNiMn high-entropy alloy coatings reinforced by CoNi-coated WC under magnetic field-assisted plasma cladding 磁场辅助等离子熔覆镍包覆WC增强CoCrFeNiMn高熵合金涂层的强化机理

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.2026.133216

Shuai Li , Yi Sun , Liangliang Zhang , Zhongying Liu

High-entropy alloy (HEA) composite coatings reinforced with ceramic particles have emerged as one of the key strategies for preventing friction and wear. In order to improve the wettability between WC particles and HEA powders, CoNi-coated WC particles were introduced into CoCrFeNiMn HEA powders. Subsequently, CoCrFeNiMn/30YGN20 (70 wt% CoCrFeNiMn +30 wt% YGN20 (80 wt% WC, 10 wt% Ni, and 10 wt% Co)) HEA coatings were fabricated on Q235 steel via magnetic field-assisted plasma cladding, and their strengthening mechanisms were systematically investigated. The results indicate that the CoNi-coated WC particles react with the matrix during the cladding process to form the M₃W₃C phase, thereby enhancing the interfacial bonding strength between the reinforcing phase and the matrix. Meanwhile, the electromagnetic braking effect induced by the magnetic field resulted in a more uniform distribution of WC particles. In addition, the thermoelectromagnetic convection generated by the magnetic field refined the grains of both the FCC matrix and the M₃W₃C phase, and promoted the formation of twins within the coating. These mechanisms collectively contributed to a remarkable enhancement of the coating performance through second-phase strengthening, solid-solution strengthening, and grain-boundary strengthening. Consequently, surface hardness increasing from 292.7 HV_0.2 to 365.7 HV_0.2 with the increasing of magnetic field strength. Wear behavior transitioned from dominant oxidative and adhesive wear under low magnetic fields to stable abrasive wear at higher fields, as grain refinement and WC particle participation increased. Under a magnetic field strength of 60 mT, the coating exhibited the best wear resistance with friction coefficients of 0.47.

陶瓷颗粒增强高熵合金（HEA）复合涂层已成为防止摩擦磨损的关键策略之一。为了提高WC颗粒与HEA粉末之间的润湿性，将coni包覆WC颗粒引入CoCrFeNiMn HEA粉末中。在Q235钢表面制备了CoCrFeNiMn/30YGN20 (70 wt% CoCrFeNiMn +30 wt% YGN20 (80 wt% WC、10 wt% Ni和10 wt% Co)) HEA涂层，并对其强化机理进行了系统研究。结果表明：ni包覆WC颗粒在包覆过程中与基体反应形成M3W3C相，增强相与基体的界面结合强度提高；同时，磁场产生的电磁制动效应使WC颗粒分布更加均匀。此外，磁场产生的热电磁对流使FCC基体和M3W3C相晶粒细化，促进了涂层内孪晶的形成。这些机制通过第二相强化、固溶强化和晶界强化共同促进了涂层性能的显著增强。随着磁场强度的增加，表面硬度由292.7 HV0.2增加到365.7 HV0.2。随着晶粒细化和WC颗粒参与的增加，磨损行为从低磁场下的氧化磨损和黏着磨损为主转变为高磁场下的稳定磨粒磨损。在磁场强度为60 mT时，涂层的耐磨性最佳，摩擦系数为0.47。

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引用次数: 0

Controlled thermal oxidation of AlCrYTiZr high-entropy alloy for enhanced corrosion resistance and mechanical properties AlCrYTiZr高熵合金的可控热氧化提高了耐蚀性和机械性能

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

Surface & Coatings Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-25 DOI: 10.1016/j.surfcoat.2026.133234

Chunyu Wang , Shu Xiao , Chunming Wu , Zishuo Ye , Hu Zhang , Wenhao Wang , Saihua Jiang , Qingdong Ruan , Yi Wu , Paul K. Chu

High-entropy alloy (HEA) coatings show great promise for corrosion protection of critical marine component surfaces but are limited by passive film degradation during long-term service in extreme marine environments. In this study, amorphous AlCrYTiZr HEA coatings are deposited on X70 steel by magnetron sputtering and then thermally oxidized at 400 °C for 2, 30, or 60 min to form AlCrYTiZrO_x (x = 31.7, 41.4, or 46.0) coatings. It is observed that extending the thermal oxidation time to 30 min resulted in the formation of a dense oxide layer (∼200 nm thick) on the coating surface, accompanied by oxygen slow diffusion into the coating interior. Furthermore, thermal oxidation enhances the adhesion between the coating and the substrate. The combined action of the surface oxide layer and amorphous coating structure effectively blocks the penetration of the external corrosive medium. As a result, AlCrYTiZrO_41.4 shows a self-corrosion current density of 2.7 × 10⁻⁹ A/cm² and hardness of 17.87 GPa. Compared to the as-deposited AlCrYTiZr HEA coating, the self-corrosion current density of the coating decreases by a factor of 14, while the hardness increases by 2.37 times. The results reveal a concise and efficient strategy for enhancing HEA coating performance, thereby expanding its potential for corrosion protection applications on X70 steel surfaces.

高熵合金（HEA）涂层在海洋关键部件表面的防腐方面显示出巨大的前景，但在极端海洋环境中长期使用时，受被动膜降解的限制。在本研究中，通过磁控溅射将非晶AlCrYTiZr HEA涂层沉积在X70钢上，然后在400°C下进行2,30或60分钟的热氧化，形成AlCrYTiZrOx （x = 31.7, 41.4或46.0）涂层。观察到，将热氧化时间延长至30 min后，涂层表面形成致密的氧化层（约200 nm厚），同时氧气缓慢扩散到涂层内部。此外，热氧化增强了涂层与基材之间的附着力。表面氧化层和非晶涂层结构的共同作用有效地阻挡了外部腐蚀介质的渗透。结果表明，AlCrYTiZrO41.4合金的自腐蚀电流密度为2.7 × 10−9 a /cm2，硬度为17.87 GPa。与沉积AlCrYTiZr HEA涂层相比，涂层的自腐蚀电流密度降低了14倍，硬度提高了2.37倍。结果揭示了一种提高HEA涂层性能的简洁有效的策略，从而扩大了其在X70钢表面防腐应用的潜力。

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引用次数: 0

Fabrication of gradient structure in 7075 aluminum alloy via initial microstructural regulation and synergistic strengthening and toughening mechanism 7075铝合金初始组织调控和协同强化增韧机制制备梯度组织

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

Surface & Coatings Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-23 DOI: 10.1016/j.surfcoat.2026.133221

Shaolei Long , Kai Feng , Ming Yang , Shengshan Pan , Jie Dong , Yu Liang , Qin Gui , Yanliang Yi

In this study, ultrasonic surface rolling processing (USRP) was employed to modify 7075 aluminum alloys with varying initial microstructure states (T6 and T4), successfully creating gradient structures (GSs) that exhibit both high strength and high plasticity, overcoming the traditional strength-plasticity trade-off in aluminum alloys. The results indicate that a GSs with a depth of up to 532 μm was achieved in the T4 state alloy (T4-USRP-A) through USRP followed by low-temperature aging. A nanocrystalline layer approximately 100 nm thick formed on the surface, significantly enhancing the yield strength (R_p0.2) and ultimate tensile strength (R_m) to 602.6 MPa and 691 MPa, respectively, while maintaining an elongation of 15%. The research further elucidated the microscopic characteristics of this GSs, which transitions continuously from nanocrystalline regions to deformable regions and dislocation-rich regions from the surface inward. Analysis based on the K-M model revealed that the alloy's high strength and plasticity are due to excellent dislocation storage and slow extinction properties, allowing the material to sustain a high strain hardening rate over a broad stress range, thus delaying necking. Additionally, this study developed a GSs synergistic strengthening model, quantifying the coordinated contribution of each gradient layer to the overall strength. This provides a crucial theoretical foundation and practical guidance for designing and preparing high-performance GSs aluminum alloys.

在本研究中，采用超声表面轧制工艺（USRP）对7075铝合金进行了不同初始组织状态（T6和T4）的改性，成功地创造了具有高强度和高塑性的梯度结构（GSs），克服了传统铝合金的强度-塑性权衡。结果表明：在T4态合金（T4-USRP- a）中通过USRP +低温时效获得了深度达532 μm的GSs；表面形成约100 nm厚的纳米晶层，屈服强度（Rp0.2）和极限抗拉强度（Rm）分别达到602.6 MPa和691 MPa，伸长率保持在15%。研究进一步阐明了这种GSs的微观特征，即从表面向内不断地从纳米晶区过渡到可变形区和富位错区。基于K-M模型的分析表明，该合金的高强度和塑性是由于优异的位错储存和缓慢的消光性能，使材料在较宽的应力范围内保持高应变硬化率，从而延迟颈缩。此外，本研究建立了GSs协同强化模型，量化了各梯度层对整体强度的协同贡献。这为设计和制备高性能GSs铝合金提供了重要的理论基础和实践指导。

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引用次数: 0

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 : 2026-03-01 Epub 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。

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引用次数: 0

Effect of Ni addition in AlSi hot-dip bath on microstructure, corrosion resistance, and hydrogen embrittlement of hot-press-formed steels AlSi热浸浴中添加Ni对热压成形钢组织、耐蚀性和氢脆的影响

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

Surface & Coatings Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-26 DOI: 10.1016/j.surfcoat.2026.133225

Dong-Gyu Kim , N Rahul , Sudipta Mohapatra , Min-Suk Oh

Hot-press forming (HPF) excels at manufacturing ultra-high-strength steel through a combination of elevated-temperature forming and in-die quenching. A critical component of this process is the application of AlSi alloy coatings, which are essential for preserving the mechanical properties of steel by preventing decarburization during high-temperature processing. Adding Ni to these coatings shows strong promise for better properties, driven by the development of Ni-based intermetallics like Al₃Ni and Al₉FeNi. Ni additions at 0, 1, 3, and 5 wt% were introduced to the molten AlSi bath to investigate changes in coating microstructure, hydrogen embrittlement (HE) susceptibility, and corrosion behavior post-HPF. With Ni present, intermetallics like Al₉FeNi and Al₃Ni developed on the coating surface as well as within the layer structure. During the HPF process, these intermetallics transformed into Al₅FeNi and localized on the surface of the coating. Ni incorporation substantially limited crack development through the coating thickness while blocking substrate contact with the electrolyte, thus boosting coated steel corrosion resistance. Moreover, Ni addition was found to decrease the formation of surface voids caused by hydrogen atoms; these voids typically occur because of the high reactivity of Al with moisture. Notably, the diffusible hydrogen content in samples containing 5 wt% Ni was reduced from 1.74 to 0.76 wppm immediately after the HPF process, indicating a substantial decrease in HE.

热压成形（HPF）通过高温成形和模内淬火相结合，擅长制造超高强度钢。该工艺的一个关键组成部分是AlSi合金涂层的应用，这是通过防止高温加工过程中的脱碳来保持钢的机械性能所必需的。在Al₃Ni和Al₉FeNi等Ni基金属间化合物的发展的推动下，向这些涂层中添加Ni显示出更好的性能。在AlSi熔液中添加0、1、3和5 wt%的Ni，以研究hpf后涂层微观结构、氢脆（HE）敏感性和腐蚀行为的变化。随着Ni的存在，像Al₉FeNi和Al₃Ni这样的金属间化合物在涂层表面和层结构内发展。在HPF过程中，这些金属间化合物转化为Al₅FeNi并定位在涂层表面。Ni的掺入通过涂层厚度限制了裂纹的发展，同时阻断了基体与电解质的接触，从而提高了涂层钢的耐腐蚀性。此外，Ni的加入减少了由氢原子引起的表面空洞的形成；这些空洞通常是由于铝与水分的高反应性而产生的。值得注意的是，在含有5 wt% Ni的样品中，HPF处理后，可扩散氢含量立即从1.74 wppm降低到0.76 wppm，表明HE显著降低。

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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 : 2026-03-01 Epub 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。

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引用次数: 0

Design of superhydrophobic anti-icing coatings guided by full-process machine learning 基于全流程机器学习的超疏水防冰涂料设计

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.2026.133235

Zijie Zhang , Yiming Liu , Siyu Chen , Lulu Liu , Junjie Liu , Tao Hu , Ting Xiao , Lihua Jiang , Xu Li , Xinyi Li , Xinyu Tan

Superhydrophobic coatings hold immense potential in anti-icing applications. The preparation of superhydrophobic anti-icing coatings involves multi-parameter design such as coating components and substrate structures, which leads to high trial-and-error rates and unclear directionality in performance optimization. Here, we first report a full-process machine learning framework that integrates large language model, post-hoc explainable machine learning model, and Bayesian Optimization framework to guide the preparation of superhydrophobic coating with superior anti-icing performance. The FPMLF autonomously collected 217 sets of coating components data from 2315 published articles, constructed a regression model for coating components design based on the collected data, and achieved the high throughput screening and optimization of the complex process parameters of the substrate structure. Guided by this framework, we successfully fabricated a coating exhibiting a freezing delay time over 30-fold longer than bare substrate. This work provides systematic support and a methodological foundation for the rational design of advanced functional materials with coupled and complex performance requirements.

超疏水涂料在防冰应用中具有巨大的潜力。超疏水防冰涂料的制备涉及到涂料组分和基材结构等多参数设计，导致其性能优化的试错率高，方向性不明确。在这里，我们首先报告了一个集成了大型语言模型、事后可解释机器学习模型和贝叶斯优化框架的全过程机器学习框架，以指导具有优异防冰性能的超疏水涂层的制备。FPMLF从2315篇已发表的论文中自主收集了217组涂层组分数据，并基于收集到的数据构建了涂层组分设计的回归模型，实现了对衬底结构复杂工艺参数的高通量筛选和优化。在这个框架的指导下，我们成功地制造了一种涂层，其冻结延迟时间比裸基材长30倍以上。这项工作为具有耦合和复杂性能要求的先进功能材料的合理设计提供了系统支持和方法基础。

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引用次数: 0

Effect of B4C-induced in-situ ceramic reinforcing phases on the mechanical properties of FeCoCrNiMnTi₀.₅Al₀.₅ high-entropy alloy coatings b4c诱导原位陶瓷增强相对feccrnimnti 0 .₅Al 0力学性能的影响。₅高熵合金涂层

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

Surface & Coatings Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-11 DOI: 10.1016/j.surfcoat.2026.133189

Fengyuan Guo , Chuanwei Shi , Lingchen Kong , Shenhao Wang , Zhiheng Zhu , Junjie Zhao , Mengjie Liao

In this study, FeCoCrNiMnTi₀.₅Al₀.₅/B₄C coatings with different B₄C contents (0, 1, 3, 5, 7, and 9 wt%) were fabricated on AISI 1045 steel by laser cladding to investigate the effect of B₄C on the evolution of microstructure and wear resistance. With increasing B₄C content, in-situ reactions during solidification produced TiC, Ti(C,B), and CrB ceramic phases, transforming the coating from a dual-phase (BCC/FCC) to a multiphase structure. The microstructure evolved from columnar to equiaxed and eventually to acicular grains. For the S4 coating, EBSD analyses revealed reduced texture strength and moderate dislocation density, contributing to enhanced strength. Grain refinement and dispersion of in-situ ceramics jointly improved the microhardness and wear resistance. The S4 coating exhibited optimal performance, with a wear rate of only 2.2% that of the AISI 1045 steel substrate. However, excessive B₄C caused CrB coarsening and brittle fracture, leading to accelerated three-body abrasive wear. At 600 °C, the uniformly distributed TiC, Ti(C,B), and CrB-rich phases exhibited excellent thermal stability, enhancing hardness and resistance to plastic deformation. Furthermore, these ceramic phases promoted the formation of a dense and continuous oxide film with self-lubricating and self-healing characteristics, markedly reducing the friction coefficient and wear rate. This study elucidates the dual strengthening and protection mechanisms provided by the in-situ ceramic phases and demonstrates that an optimized B₄C content enables superior tribological performance of the coatings under both room-temperature and 600 °C wear conditions.

在本研究中，feccrnimnti 0 .₅Al 0。通过激光熔覆在AISI 1045钢上制备了不同B₄C含量（0、1、3、5、7和9 wt%）的₅/B₄C涂层，以研究B₄C对组织演变和耐磨性的影响。随着B₄C含量的增加，凝固过程中的原位反应生成TiC、Ti（C，B）和CrB陶瓷相，使涂层由双相（BCC/FCC）转变为多相结构。显微组织由柱状组织演变为等轴组织，最终演变为针状组织。对于S4涂层，EBSD分析显示织构强度降低，位错密度适中，有助于增强强度。原位陶瓷的晶粒细化和分散性共同提高了显微硬度和耐磨性。S4涂层表现出最佳性能，磨损率仅为AISI 1045钢基体的2.2%。过量的B₄C导致CrB粗化脆性断裂，加速三体磨粒磨损。在600℃时，均匀分布的TiC、Ti（C，B）和crb富相表现出优异的热稳定性，提高了硬度和抗塑性变形能力。此外，这些陶瓷相促进了具有自润滑和自修复特性的致密连续氧化膜的形成，显著降低了摩擦系数和磨损率。本研究阐明了原位陶瓷相提供的双重强化和保护机制，并表明优化的B₄C含量使涂层在室温和600°C磨损条件下都具有优异的摩擦学性能。

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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 : 2026-03-01 Epub 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。

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