Surface & Coatings Technology最新文献_第5页

The effect of varying substrate bias voltages on the performance of AlCrNbSiTi coatings and its strengthening mechanism 不同衬底偏压对AlCrNbSiTi涂层性能的影响及其强化机理

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

Surface & Coatings Technology

Pub Date : 2026-01-13 DOI: 10.1016/j.surfcoat.2026.133194

Jie Liu , Yanghui Jiang , Yi Wang , Zhoufeng Zhao , Vasiliy Pelenovich , Xiaomei Zeng , Yanming Chen , Jun Zhang , Bing Yang

The performance of conventional protective coatings is often constrained by the intrinsic trade-off between hardness and toughness. While high-entropy alloy coatings present a promising alternative, the relationship between their microstructure and properties, along with the underlying strengthening mechanisms, remains insufficiently elucidated. In this study, the high-hardness AlCrNbSiTi coatings were fabricated by arc ion plating under different bias voltages, achieving synergistic optimization of hardness and toughness. The microstructure, phase composition, mechanical properties, and high-temperature oxidation behavior of the AlCrNbSiTi coatings were systematically investigated. The cross-sectional microstructure of the coatings exhibited progressive densification with increasing bias voltages. The coating exhibits the amorphous/nanocrystalline composite structure, which aligns consistently with predictions derived from phase formation parameters. The coatings deposited at −50 V bias exhibited optimal hardness and wear resistance, with values of 26.6 GPa and 1.4 × 10⁻⁶ mm³/N·m, respectively. Furthermore, the coatings showed exceptional high-temperature oxidation resistance, maintaining effective substrate protection even after exposure at 1000 °C. The results demonstrate that the AlCrNbSiTi coatings is a promising protective coating with broad industrial application prospects.

传统防护涂层的性能常常受到硬度和韧性之间内在权衡的制约。虽然高熵合金涂层是一种很有前途的选择，但它们的微观结构和性能之间的关系以及潜在的强化机制仍然没有得到充分的阐明。本研究采用电弧离子镀的方法，在不同的偏置电压下制备了高硬度的AlCrNbSiTi涂层，实现了硬度和韧性的协同优化。系统地研究了AlCrNbSiTi涂层的显微组织、相组成、力学性能和高温氧化行为。随着偏置电压的增加，涂层的截面组织逐渐致密化。涂层呈现出非晶/纳米晶复合结构，这与相形成参数的预测一致。在−50 V偏压下沉积的涂层具有最佳的硬度和耐磨性，硬度和耐磨性分别为26.6 GPa和1.4 × 10−6 mm3/N·m。此外，涂层表现出优异的高温抗氧化性，即使在1000°C下暴露也能保持有效的基材保护。结果表明，AlCrNbSiTi涂层是一种很有前途的防护涂层，具有广阔的工业应用前景。

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引用次数: 0

Suppressing hot salt corrosion fatigue damage in TC11 alloy at 500 °C via ultrasonic surface rolling 超声表面轧制抑制500℃下TC11合金热盐腐蚀疲劳损伤

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

Surface & Coatings Technology

Pub Date : 2026-01-13 DOI: 10.1016/j.surfcoat.2026.133177

Weidong Zhao , Hailan Shi , Daoxin Liu , Xiaohua Zhang , Jingwei Zhao

This paper mainly investigated the influence laws of ultrasonic surface rolling processing (USRP) on the surface integrity and hot salt corrosion fatigue (HSCF) of TC11 titanium alloy. All USRP treatments significantly enhanced HSCF resistance, increasing the fatigue limit by 10.26%, 28.21%, and 32.05% after 1, 12, and 24 passes USRP, respectively, compared to the base material (390 MPa). The amorphous-nanocrystalline surface layer, increased dislocation density, and deep compressive residual stress (CRS) field after USRP treatment worked together to resist hot salt corrosion and hydrogen embrittlement, effectively slowing crack initiation and growth. Meanwhile, 24 USRP rolls under low stress conditions show better performance, which was more stable and deeper CRS reduced the dominant role of corrosion; while 12 USRP rolls under high stress conditions perform better because their surface damage was smaller and the sensitivity to stress relaxation was reduced.

本文主要研究了超声表面轧制加工（USRP）对TC11钛合金表面完整性和热盐腐蚀疲劳的影响规律。与基材（390 MPa）相比，所有USRP处理均显著提高了抗HSCF性能，在USRP通过1次、12次和24次后，其疲劳极限分别提高了10.26%、28.21%和32.05%。USRP处理后，非晶纳米晶表面层、位错密度增加和深压缩残余应力（CRS）场共同作用，抵抗热盐腐蚀和氢脆，有效减缓裂纹的萌生和扩展。同时，在低应力条件下，24个USRP轧辊表现出更好的性能，更稳定，更深的CRS降低了腐蚀的主导作用；而在高应力条件下，12个USRP辊的性能更好，因为它们的表面损伤更小，对应力松弛的敏感性降低。

引用次数: 0

Aggregating-flow-guiding synergy in micro-channel tool: A surface engineering strategy for enhanced lubrication and wear resistance 微通道工具中的聚集导流协同作用：一种增强润滑和耐磨性的表面工程策略

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

Surface & Coatings Technology

Pub Date : 2026-01-13 DOI: 10.1016/j.surfcoat.2026.133192

Feilong Du , Fang Dai , Cheng Chen , Hengyu Ma , Tao Zhou , Hongfei Yao , Xuefeng Zhao , Lin He

Addressing the critical challenges of localized high temperatures and accelerated wear during minimum quantity lubrication (MQL) milling, this study proposes an innovative surface engineering strategy by developing a novel micro-channel tool (MCT). A micro-channel design framework, integrating computational fluid dynamics (CFD) and heat transfer theory, is established to facilitate the creation of functional surface structures on the tool rake face. A coupled simulation model investigates systematically the influence of structural parameters—including cross-sectional shape, distribution pattern, and dimension—on interfacial cooling and lubrication performance. By introducing the cross-sectional area (S_cs) of individual microchannels and the channel proportion factor (λ_c) as quantitative evaluation metrics, we elucidate the underlying mechanism of lubrication enhancement, thereby optimizing the channel configuration. Experimental validation confirms the performance enhancement effect of the external shrink (SH) microchannel. This structure connects the microgroove near the cutting edge to the tool's inner side and incorporates rectangular cross-sections with a 6° inclination. Compared to the original micro-groove tool (INT), the MCT reduces cutting force and temperature by 9.88% and 11.21%, respectively. It simultaneously improves the machined surface quality (with surface roughness Ra decreased by 10%) and extends tool service life by 18.2%. The SH-type microchannel appears to exert aggregating and flow-guiding effects, which actively manipulate the oil mist flow and thereby promote the formation of a stable lubricating film at the tool-chip interface. SEM-EDS analysis indicates that the microchannel-enabled film contributes to reduced adhesive and oxidation wear. This work establishes a pioneering “functional surface-lubricating film-wear resistance” collaborative optimization paradigm, offering a theoretical foundation for active thermal and tribological management in the high-efficiency machining of difficult-to-machine materials.

针对最小量润滑（MQL）铣削过程中局部高温和加速磨损的关键挑战，本研究提出了一种创新的表面工程策略，即开发一种新型微通道工具（MCT）。结合计算流体力学（CFD）和传热理论，建立了一种微通道设计框架，以促进工具前刀面功能表面结构的创建。耦合仿真模型系统地研究了结构参数（包括截面形状、分布模式和尺寸）对界面冷却和润滑性能的影响。通过引入单个微通道的横截面积（Scs）和通道比例因子（λc）作为定量评价指标，我们阐明了增强润滑的潜在机制，从而优化了通道结构。实验验证了外收缩微通道的性能增强效果。这种结构将切削边缘附近的微槽连接到工具的内侧，并包含6°倾斜的矩形横截面。与原始微槽刀具（INT）相比，MCT的切削力和切削温度分别降低了9.88%和11.21%。同时提高了加工表面质量（表面粗糙度Ra降低了10%），延长了刀具使用寿命18.2%。sh型微通道具有聚集和导流作用，主动操纵油雾流动，促进刀屑界面稳定润滑膜的形成。SEM-EDS分析表明，微通道薄膜有助于减少粘着和氧化磨损。这项工作建立了一个开创性的“功能性表面润滑膜-耐磨性”协同优化范例，为难加工材料的高效加工中的主动热学和摩擦学管理提供了理论基础。

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引用次数: 0

Comparative study on phase formation, microstructure and high-temperature oxidation behavior of Nb-silicide coatings: Role of different substrate alloys 铌硅化物涂层相形成、显微组织及高温氧化行为的对比研究：不同基体合金的作用

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

Surface & Coatings Technology

Pub Date : 2026-01-13 DOI: 10.1016/j.surfcoat.2026.133193

Weiping Zhang, Yanqiang Qiao, Xiping Guo

The insufficient oxidation resistance of Nb based alloys is the primary challenge they face in actual service conditions. Due to differences in composition, phase constituents, and microstructure among various types of Nb alloys, the structure and oxidation behavior of their coatings can vary significantly. Therefore, investigating the formation and oxidation resistance of silicide coatings on different substrate is of great significance for developing coatings suitable for various Nb alloys. Thus, this study employed the slurry sintering to prepare Nb-silicide coatings on both Nb521 and NbSi based alloys. The microstructure formation of the coatings, and their microstructural evolution and oxidation behavior at high temperatures were investigated. The coating on Nb521 alloy is primarily composed of (Nb,X´)Si₂, Cr₄Nb₂Si₅ and pure NbSi₂, whereas that on NbSi based alloy is predominantly (Nb,X)Si₂. At 1250 °C, a tri-layered scale formed on the coating of the NbSi based alloy, while a thinner, crystalline SiO₂ scale with dispersed TiO₂ particles was developed on the coating of the Nb521 alloy. The difference in the oxidation behavior of the two coatings primarily stems from the structural differences of the SiO₂. On Nb521, although crystalline SiO₂ hinders oxygen diffusion, its low flowability leads to the depletion of Cr₂O₃ and failure at the edges, whereas on the NbSi based alloy, the amorphous SiO₂ exhibits good fluidity, which can not only suppress further oxidation of Cr₂O₃ but also promote crack healing. Due to better healing ability for cracks, the coating on NbSi based alloy exhibited superior oxidation resistance at 1250 °C. At 1350 °C, the scale formation process of both coatings was accelerated, but their microstructures did not exhibit significant changes.

铌基合金在实际使用中面临的主要挑战是抗氧化能力不足。由于不同类型铌合金的组成、相组成和显微组织的差异，其镀层的结构和氧化行为会有很大的不同。因此，研究硅化物涂层在不同基体上的形成及其抗氧化性，对开发适用于各种铌合金的涂层具有重要意义。因此，本研究采用浆液烧结的方法在Nb521和NbSi基合金上制备了铌硅化物涂层。研究了涂层的显微组织形成、显微组织演变和高温氧化行为。Nb521合金的镀层主要由（Nb,X´）Si2、Cr4Nb2Si5和纯NbSi2组成，而NbSi基合金的镀层主要由（Nb，X）Si2组成。1250℃时，NbSi基合金涂层上形成三层结垢，Nb521基合金涂层上形成较薄的SiO2晶体结垢，并形成分散的TiO2颗粒。两种涂层氧化性能的差异主要源于SiO2的结构差异。在NbSi基合金上，无定形SiO2表现出良好的流动性，不仅可以抑制Cr2O3的进一步氧化，还可以促进裂纹的愈合，而NbSi基合金上的无定形SiO2表现出良好的流动性，阻碍了氧的扩散，但其流动性较低，导致Cr2O3的损耗和边缘失效。由于具有较好的裂纹愈合能力，NbSi基合金涂层在1250℃时表现出优异的抗氧化性能。在1350℃时，两种涂层的结垢过程都加快了，但其显微组织没有发生明显变化。

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引用次数: 0

Influence of transient plasma behavior on the microstructure and properties of CrN coatings under pulsed bias conditions: Insights from multi-scale simulation and experiment 脉冲偏压条件下瞬态等离子体行为对CrN涂层微观结构和性能的影响：来自多尺度模拟和实验的见解

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

Surface & Coatings Technology

Pub Date : 2026-01-13 DOI: 10.1016/j.surfcoat.2026.133195

Zhenghao Ren , Liwei Zheng , Ganggang Wang , Haojie Chen , Haixin Li , Yonghong Cao , Zhenlin Yang , Shusheng Xu

Optimizing the properties of CrN coatings is critical for their performance in demanding industrial applications. However, achieving this optimization remains challenging due to the complex plasma characteristic and plasma-surface interactions under pulsed plasma conditions. This study investigates the effect of substrate bias pulse duty cycle at a fixed frequency of 50 kHz on the microstructure and tribological performance of CrN coatings deposited via magnetron sputtering, integrating experiments and multi-scale simulations. Experimentally, decreasing the duty cycle from 100% (DC bias) to 25% increased the bias current from 0.1 A to 0.7 A, yet coatings grown at higher duty cycles displayed enhanced (200) texture, finer columnar grains, and smoother surfaces, resulting in superior mechanical and tribological properties. The simulation results reveal that at low duty cycles, numerous electrons are attracted to the substrate during extended pulse-off stage, generating electron current compensation and thus a higher total bias current. However, the shortened pulse-on stage and insufficient energy of ions acquired from plasma sheath at low duty cycles lead to reduced ion-to-atom energy (E_ion). Molecular dynamics simulations further support a shift from layer-by-layer to island-like growth with decreasing duty cycles, leading to rougher surfaces and deteriorated properties. This work establishes a direct connection between transient plasma energetics and atomic-scale growth under pulsed conditions, offering a physically grounded understanding of energy transfer across multiple scales. The insights gained provide a theoretical basis for optimizing pulsed plasma-assisted deposition of advanced coatings with tailored structural and functional properties.

优化CrN涂层的性能对其在苛刻的工业应用中的性能至关重要。然而，由于脉冲等离子体条件下复杂的等离子体特性和等离子体表面相互作用，实现这种优化仍然具有挑战性。结合实验和多尺度模拟，研究了固定频率为50 kHz的衬底偏置脉冲占空比对磁控溅射制备CrN涂层的微观结构和摩擦学性能的影响。在实验中，将占空比从100%（直流偏置）降低到25%，使偏置电流从0.1 A增加到0.7 A，但在更高占空比下生长的涂层显示出增强的（200）纹理，更细的柱状颗粒和更光滑的表面，从而获得更好的机械和摩擦学性能。仿真结果表明，在低占空比下，在延长的脉冲关闭阶段，大量电子被吸引到衬底上，产生电子电流补偿，从而产生更高的总偏置电流。然而，脉冲开启阶段的缩短和低占空比下从等离子体鞘获得的离子能量不足导致离子到原子能量（Eion）的降低。分子动力学模拟进一步支持了从一层接一层到岛状生长的转变，随着占空比的减少，导致表面更粗糙，性能更差。这项工作建立了脉冲条件下瞬态等离子体能量学和原子尺度生长之间的直接联系，为跨多个尺度的能量转移提供了物理基础理解。所获得的见解为优化脉冲等离子体辅助沉积具有定制结构和功能特性的先进涂层提供了理论基础。

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引用次数: 0

Research on the interface bonding mechanism and lifespan model of BIPV bonded structures BIPV键合结构界面键合机理及寿命模型研究

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

Surface & Coatings Technology

Pub Date : 2026-01-12 DOI: 10.1016/j.surfcoat.2026.133164

Yonghua Zhu , Fugui Ha , Runze Zhang , Yunchuan Xie , Zhen Liu

Thermoplastic polyolefin (TPO) is widely used in automotive, waterproofing, and electrical applications due to its excellent mechanical properties, weather resistance, and chemical corrosion resistance. With the advancing refinement of solar technology, building-integrated photovoltaics (BIPV) urgently require enhanced bonding strength and durability at the adhesive interface between the TPO base layer and silicone adhesive. This study proposes a modification strategy using plasma treatment to alter the surface chemistry of TPO and improve its interaction with silicone adhesive, thereby constructing a robust and durable bonded interface. Furthermore, a computational model for predicting the service life of adhesive joints under complex external field coupling was established. The results demonstrate that the bonding strength at the interface increased from 0.23 MPa for untreated TPO to 1.25 MPa for plasma-modified TPO, while the lap shear strength improved from 0.42 MPa to 1.84 MPa. Numerical simulations and aging tests were employed to develop a generalized Eyring model for predicting the service life of the adhesive structure under combined stress-humidity-thermal conditions. The model achieved an accuracy of 98%, and the predicted service life of the joint under 45 °C and 30% RH was 18.17 years, meeting practical application requirements. This research provides theoretical support for the design of bonding strength and durability in BIPV interfaces, the formulation of engineering maintenance strategies, and the optimization of lifetime prediction standards, thereby contributing to the long-term safe operation of BIPV under the dual‑carbon goals.

热塑性聚烯烃（TPO）因其优异的机械性能、耐候性和耐化学腐蚀性而广泛应用于汽车、防水和电气应用。随着太阳能技术的不断完善，建筑集成光伏（BIPV）迫切需要提高TPO基材与有机硅胶粘剂粘合界面的粘合强度和耐久性。本研究提出了一种利用等离子体处理改变TPO表面化学性质并改善其与有机硅粘合剂相互作用的改性策略，从而构建坚固耐用的粘合界面。在此基础上，建立了复杂外场耦合作用下粘接寿命预测的计算模型。结果表明：等离子体改性TPO的界面结合强度从0.23 MPa提高到1.25 MPa，搭接剪切强度从0.42 MPa提高到1.84 MPa；通过数值模拟和老化试验，建立了粘接结构在应力-湿-热复合条件下使用寿命的广义Eyring模型。该模型的预测精度达到98%，在45°C、30% RH条件下，预测接头的使用寿命为18.17年，满足实际应用要求。本研究为BIPV界面的粘结强度和耐久性设计、工程维护策略的制定、寿命预测标准的优化提供理论支持，有助于BIPV在双碳目标下的长期安全运行。

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引用次数: 0

TiAlN-based coating architectures for enhanced solid particle erosion resistance 增强固体颗粒耐蚀性的钛基涂层体系结构

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

Surface & Coatings Technology

Pub Date : 2026-01-11 DOI: 10.1016/j.surfcoat.2026.133176

B. Millan-Ramos , P.R.T. Avila , S. Brown , L.B. Varela , M. Cavarroc-Weimer , J.M. Mendez , M. Patterson , L. Martinu , J.E. Klemberg-Sapieha

Solid particle erosion (SPE) can severely damage the airfoils of aircraft engines, reducing thrust and increasing fuel consumption. Ti-based nitride coatings are a suitable solution to protect against SPE. However, an optimal coating architecture should control intrinsic stress development during coating deposition. In the present work, two coating systems were deposited on Ti-6Al-4V alloy by low duty cycle magnetron sputtering (LDMS): i) monolithic TiAlN coatings with different bias values applied across their thickness, and ii) multilayer coatings composed of alternating metallic TiAl and ceramic TiAlN layers. The coating thickness varies from 9.5 μm to 11.4 μm depending on the architecture. All the samples exhibit a cubic-TiN crystallographic structure and the stress-depth profiles indicate that the development of compressive stresses strongly depends on the coating architecture. High hardness (25–30 GPa) was observed for coatings with moderately stressed surfaces (2.1–3.8 GPa in compression), and improved scratch resistance (L_C2 > 26 N) was obtained for coatings with moderate-to-low stress profiles. In addition, the coating's erosion resistance is increased by up to two orders of magnitude (1.3 × 10⁵ μm/g) compared to the bare substrate (3.7 × 10⁷ μm/g) while using Al₂O₃ particles at a speed of 75 m/s. The examination of the eroded surface reveals a combination of brittle and ductile mechanisms involved in the SPE process. The differences in the erosion rate of the coatings are correlated to the index of brittleness and the residual stress depth profile.

固体颗粒侵蚀（SPE）会严重破坏飞机发动机的翼型，降低推力，增加燃油消耗。钛基氮化物涂层是防止固相萃取的合适解决方案。然而，最佳的涂层结构应该控制涂层沉积过程中的内在应力发展。本文采用低占空比磁控溅射（LDMS）技术在Ti-6Al-4V合金上沉积了两种涂层体系：i)在不同厚度上施加不同偏置值的单片TiAlN涂层，ii)由金属TiAl层和陶瓷TiAlN层交替组成的多层涂层。根据结构的不同，涂层厚度从9.5 μm到11.4 μm不等。所有样品均呈现立方tin晶体结构，应力-深度分布表明压应力的发展与涂层结构密切相关。中等应力表面（2.1-3.8 GPa）涂层具有较高的硬度（25-30 GPa），中等至低应力表面涂层具有较好的抗划伤性能（LC2 > 26 N）。此外，当Al2O3颗粒以75 m/s的速度沉积时，涂层的耐蚀性比裸基板（3.7 × 107 μm/g）提高了两个数量级（1.3 × 105 μm/g）。对侵蚀表面的检查揭示了SPE过程中涉及的脆性和延性机制的组合。腐蚀速率的差异与涂层的脆性指数和残余应力深度分布有关。

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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 : 2026-01-11 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

Influence of thermal barrier coating on the stress rupture life of thin-walled Ni-based single crystal superalloy 热障涂层对薄壁ni基单晶高温合金应力断裂寿命的影响

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

Surface & Coatings Technology

Pub Date : 2026-01-10 DOI: 10.1016/j.surfcoat.2026.133169

Jing Liu , Li Wang , Minghan Yu , Liping Xu , Shiling Min , Di Wang , Xiangwei Jiang , Jiasheng Dong , Langhong Lou

Thermal barrier coatings (TBCs) are widely used on advanced thin-walled Ni-based single crystal (SX) blades. In this study, the influence of TBC on the stress rupture life of thin-walled Ni-based SX superalloy was investigated at 1100 °C/120 MPa. For 0.5 mm wall thickness (T_0.5) specimens, the average stress rupture life of bare specimens (48 h) was 43.8% shorter than that of the coated specimens (68 h). No significant difference was found between the T_1.0 bare specimens (111 h) and coated specimens (118 h). In contrast, for the T_1.5 specimens, the bare specimens (186 h) exhibited a 45.2% longer life than the coated specimens (102 h). In T_0.5 specimens, TBC delays the plastic deformation of the substrate and increases the initial load-bearing area. These effects collectively slow oxidation and delay both the degradation of the γ/γ' phase and the initiation and propagation of cracks, ultimately leading to a longer stress rupture life of the coated specimens. In T_1.0 specimens, TBC delays the plastic deformation of the substrate and increases the initial load-bearing area, while the severe TBC oxidation and inhomogeneous macroscopic plastic deformation accelerated by the TBC spallation promote degradation of the γ/γ' phase as well as the initiation and propagation of cracks. As a result, the stress rupture lives of the T_1.0 bare and coated specimens become comparable. Conversely, in T_1.5 specimens, the TBC has a limited effect on delaying deformation and increasing the initial effective load-bearing area. However, TBC degradation and spallation accelerated inhomogeneous macroscopic plastic deformation of substrate. These synergistic effects drastically reduce the stress rupture life of the coated specimens. Furthermore, the TBC damage mechanism is strongly thickness-dependent. These findings provide valuable insights for structural optimization and damage analysis of advanced turbine blades.

热障涂层广泛应用于高级薄壁镍基单晶（SX）叶片。在1100℃/120 MPa下，研究了TBC对ni基SX薄壁高温合金应力断裂寿命的影响。对于壁厚为0.5 mm （T0.5）的试样，裸露试样的平均应力断裂寿命（48 h）比涂层试样的平均应力断裂寿命（68 h）短43.8%。T1.0裸体（111 h）与包覆体（118 h）无显著差异。相比之下，对于T1.5的样品，裸露的样品（186 h）比涂覆的样品（102 h）寿命长45.2%。在T0.5试样中，TBC延缓了基体的塑性变形，增大了初始承载面积。这些效应共同减缓了氧化，延缓了γ/γ′相的降解以及裂纹的产生和扩展，最终导致涂层试样具有更长的应力断裂寿命。在T1.0试样中，TBC延缓了基体的塑性变形，增加了基体的初始承载面积，而TBC严重的氧化和TBC剥落加速的不均匀宏观塑性变形促进了γ/γ′相的降解，促进了裂纹的萌生和扩展。结果表明，T1.0裸露和涂层试样的应力断裂寿命具有可比性。相反，在T1.5试件中，TBC对延迟变形和增加初始有效承载面积的作用有限。而TBC的降解和剥落加速了基体的非均匀宏观塑性变形。这些协同效应大大降低了涂层试样的应力断裂寿命。此外，TBC损伤机制与厚度密切相关。这些发现为先进涡轮叶片的结构优化和损伤分析提供了有价值的见解。

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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 : 2026-01-10 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