Tribology International最新文献_第3页

Immature polymeric nanoparticles as promising lubricant additives enable robust oil-based lubrication and efficient waste-to-resource conversion 未成熟的聚合物纳米颗粒作为有前途的润滑剂添加剂，可以实现坚固的油基润滑和有效的废物到资源的转化

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2026-07-01 Epub Date: 2026-02-04 DOI: 10.1016/j.triboint.2026.111791

Zihao Mou , Jinyu Yao , Lu Wang , Yangdong He , Bin Zhao , Zhijun Wang , Ying Li , Weiwei Tang , Zhiqiang Jiang , Baogang Wang

Separation and application of immature nanoparticles from the synthesis system of polymeric nanoparticles (PNPs) is a cost-effective route to improve the utilization rate of monomers. Here, for the first time, mature and immature polydopamine nanoparticles (mPNPs and imPNPs) with a total yield of up to 75.7 % were separated from the ammonia-driven synthesis system via centrifugation and dialysis, and further transformed into the polyelectrolyte-modified PNPs (mPPNPs and imPPNPs) in a simple strategy. These PPNPs exhibited respectable colloidal stability and tribological properties as lubricant additives of PEG200. Tribological evaluations reflected that the optimal doses of mPPNPs and imPPNPs are 1.0 wt% and 0.5 wt%, respectively. At these doses, the friction and wear reductions by imPPNPs (38.2 % and 63.7 %) were higher than those of mPPNPs (37.6 % and 61.6 %), which is attributed to the smaller size and higher charge density of imPPNPs than mPPNPs. Moreover, the tribological stability of imPPNPs is better than that of mPPNPs under heavy-load, high-speed, long-duration, and start-stop tests. Potential-controlled friction experiments and wear analyses confirmed that the good adsorption ability of the polyelectrolyte shell, the strong adhesion and chelation effects of polydopamine structures, and the deposition of hybrid tribofilm should be responsible for the robust tribological behaviors of imPPNPs. This study highlights the prospect of imPNPs in tribology, enabling waste-to-resource conversion and providing new insights into green lubrication.

从聚合纳米颗粒合成体系中分离和应用未成熟纳米颗粒是提高单体利用率的一种经济有效的途径。通过离心和透析，首次从氨驱动合成体系中分离出总收率高达75.7% %的成熟和不成熟的聚多巴胺纳米粒子（mPNPs和imPNPs），并以简单的策略进一步转化为聚电解质修饰的PNPs （mPPNPs和imPPNPs）。这些PPNPs作为PEG200的润滑剂添加剂具有良好的胶体稳定性和摩擦学性能。摩擦学评估表明，mPPNPs和imPPNPs的最佳剂量分别为1.0 wt%和0.5 wt%。在这些剂量下，imPPNPs的摩擦磨损减量（38.2 %和63.7 %）高于mPPNPs(37.6 %和61.6 %)，这是由于imPPNPs比mPPNPs尺寸更小，电荷密度更高。此外，在重载、高速、长时间和启停试验中，imPPNPs的摩擦学稳定性优于mPPNPs。势控摩擦实验和磨损分析证实，聚电解质壳的良好吸附能力、聚多巴胺结构的强粘附和螯合作用以及杂化摩擦膜的沉积是imPPNPs具有良好摩擦学性能的原因。这项研究强调了imPNPs在摩擦学中的前景，实现了废物到资源的转化，并为绿色润滑提供了新的见解。

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引用次数: 0

Influence of ammonia on lubricant degradation and tribological behavior of cylinder liner piston ring system 氨对润滑油降解及缸套活塞环系统摩擦学性能的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2026-07-01 Epub Date: 2026-02-04 DOI: 10.1016/j.triboint.2026.111796

Zetong Wang , Yuxuan Sheng , Yuanqi Mai , Xuan Ma , Xing Xu , Bo Li , Chuixiao Li

Ammonia fuel, characterized by its hydrogen-rich and carbon-free properties, has garnered significant attention in the field of engines. However, the incylinder environment generated by the fuel and its combustion products may alter the tribological behavior of the engine, thereby impacting the reliability and durability of critical components such as the cylinder liner-piston ring (CLPR) friction pair. This study establishes an experimental protocol to simulate the degradation of lubricating oil induced by ammonia fuel in engines and to assess the tribological performance of the aged oil. Based on the analysis of lubricating oil properties influenced by ammonia and tribological testing results, the degradation mechanism of lubricating oil and the surface damage mechanism of the cylinder liner caused by ammonia were evaluated. Studies have demonstrated that the presence of ammonia impairs the performance of lubricating oils, including increasing kinematic viscosity and altering the total base number (TBN). Additionally, research highlights that ammonia escape characteristics should be considered a critical factor in investigating the tribological behavior of CLPR in ammonia engines. This study offers an exploratory reference for the design of experimental protocols related to the tribological behavior of CLPR in ammonia engines.

氨燃料以其富氢、无碳的特性在发动机领域引起了广泛的关注。然而，燃料及其燃烧产物所产生的气缸环境可能会改变发动机的摩擦学行为，从而影响缸套-活塞环（CLPR）摩擦副等关键部件的可靠性和耐用性。本研究建立了一种模拟氨燃料在发动机中引起润滑油退化的实验方案，并对老化油的摩擦学性能进行了评估。在分析氨对润滑油性能影响的基础上，结合摩擦学试验结果，对润滑油的降解机理和氨对缸套表面的损伤机理进行了评价。研究表明，氨的存在会损害润滑油的性能，包括增加运动粘度和改变总碱值（TBN）。此外，研究强调，氨逸特性应被认为是研究氨发动机CLPR摩擦学行为的关键因素。该研究为氨发动机CLPR摩擦学性能相关实验方案的设计提供了探索性参考。

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引用次数: 0

Influence of inflammatory environment on the fretting corrosion of CoCrMo–Ti6Al4V alloy pairs at the hip head–neck interface 炎症环境对CoCrMo-Ti6Al4V合金对髋头颈界面微动腐蚀的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2026-07-01 Epub Date: 2026-02-04 DOI: 10.1016/j.triboint.2026.111793

Jian Pu , Xing Peng , Ruijuan Liu , Shu Yang , Yali Zhang , Xiaogang Zhang , Chao Zhang , Jian Song , Zhongmin Jin

Implantation of artificial hip joints frequently induces local inflammatory responses, resulting in the accumulation of reactive oxygen species (ROS) such as H₂O₂ in peri-prosthetic fluid. These species critically affect fretting corrosion at the femoral head–neck interface. In this study, the fretting corrosion behavior of a CoCrMo–Ti6Al4V alloy pair was examined under simulated inflammatory conditions by introducing H₂O₂. A running condition fretting map (RCFM) was established, identifying three fretting regimes: partial slip (PSR), mixed fretting (MFR), and gross slip (GSR). Compared with normal physiological conditions, the presence of H₂O₂ markedly accelerated corrosion and aggravated material degradation across all regimes. The damage mechanisms of the Ti6Al4V–CoCrMo pair vary significantly across different regimes: abrasive wear and tribocorrosion dominate in PSR; adhesive wear and intensified tribocorrosion occur in MFR; and in GSR, severe abrasive wear, tribocorrosion were observed. Increasing H₂O₂ concentration enhanced thermodynamic stability but intensified corrosion kinetics. Concurrently, the dominant damage mechanism transitions from abrasive wear to tribocorrosion characterized by spallation. These collectively lead to a marked increase in material loss and metal ion release. Overall, H₂O₂ promotes cathodic depolarization and the formation of mechanically unstable oxide films, thereby strengthening corrosion-wear synergy and exacerbating material damage under inflammatory conditions.

人工髋关节植入术经常引起局部炎症反应，导致假体周围液体中活性氧（ROS）如h2o2的积累。这些物质严重影响股骨头颈界面的微动腐蚀。在本研究中，通过引入H₂O₂，研究了CoCrMo-Ti6Al4V合金对在模拟炎症条件下的微动腐蚀行为。建立了运行工况微动图（RCFM），确定了三种微动模式：部分滑移（PSR）、混合微动（MFR）和总滑移（GSR）。与正常生理条件相比，在所有条件下，h2o2的存在显著加速了腐蚀，加剧了材料的降解。Ti6Al4V-CoCrMo对的损伤机制在不同状态下存在显著差异：磨料磨损和摩擦腐蚀在PSR中占主导地位；粘结磨损和摩擦腐蚀加剧；在GSR中，观察到严重的磨粒磨损和摩擦腐蚀。H₂O₂浓度的增加提高了热力学稳定性，但加剧了腐蚀动力学。同时，主要的损伤机制由磨粒磨损转变为以剥落为特征的摩擦腐蚀。这些共同导致材料损失和金属离子释放的显著增加。总的来说，h2o2促进阴极去极化和形成机械不稳定的氧化膜，从而加强腐蚀磨损协同作用，加剧炎症条件下的材料损伤。

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引用次数: 0

Achieving near-net-forming of in-situ fabricated SiCp/2024Al composites with high performance by friction stir channeling assisted stationary shoulder friction stir processing 采用搅拌摩擦通道辅助静肩搅拌摩擦工艺制备高性能原位制备SiCp/2024Al复合材料

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2026-07-01 Epub Date: 2026-02-02 DOI: 10.1016/j.triboint.2026.111786

Chuanchao Xia , Xiaobo Li , Xiaochao Liu , Xincheng Wang , Tairui Zhang , Biao Chen , Xuecheng Jin , Wenwen Sun , Zhonghua Ni

This study developed a novel friction stir channeling assisted stationary shoulder friction stir processing (CaSSFSP) approach to minimize surface thinning and the ejection of reinforcement particles commonly encountered in conventional FSP, and successfully applied it to fabricate 10 vol% SiCp/2024Al composites. The influence of processing passes on the uniformity of SiC particles distribution was investigated. The microstructural characteristics, mechanical and tribological properties of the composites were systematically analyzed and evaluated. The results demonstrated the excellent near-net-forming capability of the CaSSFSP approach. With an increase in the number of processing passes from two to four, the formation of onion rings was significantly suppressed, leading to a remarkable improvement in the mechanical properties of the composites. After four-pass CaSSFSP processing, the composites achieved an elastic modulus of 92.7 GPa, a 23.9 % improvement over the matrix. Following T6 heat treatment, the yield strength of the composites reached 364.1 MPa, 16.7 % higher than that of the base metal. The wear rate was reduced by 35.2 % compared with the base metal. The enhanced mechanical and tribological properties are mainly attributed to the uniform distribution of SiC particles and their strong interfacial bonding with the aluminum matrix. Theoretical analysis further indicates that grain boundary strengthening and precipitation strengthening are the dominant strengthening mechanisms in the SiCp/2024Al composites.

本研究开发了一种新型的搅拌摩擦通道辅助静止肩摩擦搅拌处理（CaSSFSP）方法，以最大限度地减少传统FSP中常见的表面变薄和增强颗粒的喷射，并成功地将其应用于制备10 vol% SiCp/2024Al复合材料。研究了加工工序对碳化硅颗粒分布均匀性的影响。系统地分析和评价了复合材料的显微组织特征、力学性能和摩擦学性能。结果表明，CaSSFSP方法具有优异的近网络成形能力。随着加工道次从2道次增加到4道次，洋葱环的形成被显著抑制，导致复合材料的力学性能得到显著改善。经过四道CaSSFSP处理后，复合材料的弹性模量达到92.7 GPa，比基体提高23.9 %。经T6热处理后，复合材料的屈服强度达到364.1 MPa，比母材的屈服强度提高16.7 %。与母材相比，磨损率降低35.2% %。SiC颗粒的均匀分布及其与铝基体的强界面结合是提高材料力学性能和摩擦学性能的主要原因。理论分析进一步表明，晶界强化和析出强化是SiCp/2024Al复合材料的主要强化机制。

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引用次数: 0

Modelling and analysis of non-contacting mechanical face seals with axial disturbances and misalignment 具有轴向扰动和不对准的非接触式机械密封的建模与分析

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2026-07-01 Epub Date: 2026-01-29 DOI: 10.1016/j.triboint.2026.111761

Ben S. Ashby , Tristan Pryer , Nicola Y. Bailey

Advancements in industrial applications are driving developments in non-contacting mechanical seal technology. Key requirements include improvements in efficiency and reliability, which lead to smaller clearances, lower frictional losses, and minimisation of wear, during operation. However, a critical consideration is the effect of external disturbances experience by the seal from the local environment which may cause destabilisation, and lead to premature failures through unanticipated face contact.

This work examines the dynamic behaviour of a non-contacting mechanical face seals, where a thin fluid film separates a pair of coaxial discs; a rotor (rotating face) and stator (stationary face). It is assumed that the rotor–stator have an angular misalignment and operation is under conditions involving large axial disturbances, representing external disturbances. A fully coupled unsteady mathematical representation is developed, where the fluid flow is coupled to the structural response of the stator, and the rotor motion is prescribed. The stator is modelled as a spring–mass–damper system, and the fluid film model is based on a lubrication approximation of the Navier–Stokes equations. The governing equations are solved via a numerical technique based on finite element and Runge–Kutta methods.

A parameter study reveals the impact of misalignment on the seal dynamics, when experiencing an external disturbance. The angle of misalignment and corresponding amplitude of forcing can be identified when the minimum fluid film thickness becomes less than a given tolerance. This provides insights into safe operating conditions and manufacturing tolerances, with the research aiding to improve the design critera and reliability of non-contacting mechanical face seals.

工业应用的进步推动了非接触式机械密封技术的发展。关键要求包括提高效率和可靠性，从而实现更小的间隙，更低的摩擦损失，并在运行过程中最大限度地减少磨损。然而，一个关键的考虑因素是来自当地环境的外部干扰对密封的影响，这些干扰可能会导致不稳定，并通过意想不到的表面接触导致过早失效。这项工作检查了非接触式机械面密封的动态行为，其中薄流体膜分离一对同轴盘；有转子（旋转面）和定子（静止面）。假设转子-定子存在角不对中，并且运行在有较大轴向扰动的条件下，轴向扰动代表外部扰动。建立了一种完全耦合的非定常数学表示，其中流体流动与定子的结构响应耦合，转子运动是规定的。定子被建模为弹簧-质量-阻尼系统，流体膜模型是基于Navier-Stokes方程的润滑近似。采用基于有限元和龙格-库塔法的数值方法求解控制方程。参数研究表明，当遇到外部干扰时，不对准对密封动力学的影响。当最小液膜厚度小于给定公差时，可以确定不对准角和相应的强迫幅度。这提供了对安全操作条件和制造公差的见解，研究有助于提高非接触式机械密封的设计标准和可靠性。

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引用次数: 0

Tribochemically driven construction of C/WO3 low-adhesion sliding interfaces in WC/a-C films WC/a-C薄膜中C/WO3低粘附滑动界面的摩擦化学驱动构建

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2026-07-01 Epub Date: 2026-02-10 DOI: 10.1016/j.triboint.2026.111821

Xiangxiang Pan , Dongqing He , Feng Mao , Lunlin Shang , Jun Cao

This study reveals the formation mechanism of the C/WO₃ low-adhesion sliding interface in WC/a-C films under low-humidity atmospheric conditions. Experiments show that sliding friction induces shear-stress-activated oxidation of WC nanoparticles, generating a WO₃ transfer film on the counterpart steel ball which chemically adheres via Fe-O-W bonds. This interfacial reconstruction establishes a stable C/WO₃ contact, achieving a low friction coefficient of 0.03. First-principles calculations confirm that the selective transfer originates from the strong chemisorption of WO₃ on Fe (-24.94 eV), far exceeding the van der Waals interaction at the C/Fe interface (-7.23 eV), thereby stabilizing the WO₃ layer on the steel counterpart. Charge density and Bader charge analyses reveal significant electron transfer, directly validating the Fe-O-W bonding mechanism for low friction.

本研究揭示了低湿大气条件下WC/a-C膜中C/WO3低粘附滑动界面的形成机理。实验表明，滑动摩擦引起WC纳米颗粒的剪切应力活化氧化，在对应的钢球上形成WO3转移膜，并通过Fe-O-W键化学粘附。这种界面重建建立了稳定的C/WO3接触，实现了0.03的低摩擦系数。第一原理计算证实，选择性转移源于WO3在Fe上的强化学吸附（-24.94 eV），远远超过C/Fe界面处的范德瓦尔斯相互作用（-7.23 eV），从而稳定了钢表面的WO3层。电荷密度和Bader电荷分析揭示了显著的电子转移，直接验证了Fe-O-W键合机制的低摩擦。

引用次数: 0

Insights into microstructure and fretting wear behavior of additively manufactured oxide reinforced FeCrAl alloy for nuclear reactors 核反应堆用增材制造氧化增强FeCrAl合金微观结构及微动磨损性能研究

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2026-07-01 Epub Date: 2026-02-03 DOI: 10.1016/j.triboint.2026.111790

K.R. Ramkumar , Salikh Omarov , Christopher Silligman , Mkpe Kekung , Sanika Paranjape , Pial Das , Sougata Roy

The FeCrAl (Iron-Chromium-Aluminum) ferritic alloy is widely recognized for its exceptional oxidation resistance and superior mechanical performance in nuclear applications. Owing to its manufacturing versatility, this alloy has also gained significant importance in the field of additive manufacturing (AM). In the present work, Y₂O₃-reinforced FeCrAl composites were developed using the direct energy deposition (DED) technique with reinforcement concentrations of 0.2 and 0.6 wt%. For comparison, the study also considered pure alloy in wrought form and in-printed form using mechanically milled powders. The study revealed key microstructural features, including morphological differences, and precipitate formation in DED-processed and conventionally fabricated alloys. The findings demonstrate that Y₂O₃ reinforcement significantly enhanced the mechanical and high-temperature wear resistance by promoting the formation of oxide layer.

铁铬铝铁素体合金因其优异的抗氧化性能和卓越的机械性能在核应用中得到广泛认可。由于其制造的多功能性，该合金在增材制造（AM）领域也获得了重要的意义。在本工作中，采用直接能量沉积（DED）技术开发了y2o3增强的FeCrAl复合材料，增强浓度为0.2和0.6 wt%。为了比较，该研究还考虑了纯合金在锻造形式和印刷形式使用机械研磨粉末。该研究揭示了d -加工合金和常规制造合金的关键显微组织特征，包括形态差异和沉淀形成。结果表明，Y2O3增强剂通过促进氧化层的形成，显著提高了合金的机械耐磨性和高温耐磨性。

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引用次数: 0

Microstructural evolution and high-temperature properties of laser cladding WTaMoNb refractory high-entropy alloy coatings: The critical role of gradient preheating temperature 激光熔覆WTaMoNb难熔高熵合金涂层的显微组织演变及高温性能：梯度预热温度的关键作用

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2026-07-01 Epub Date: 2026-02-04 DOI: 10.1016/j.triboint.2026.111792

Kaitian Mei , Wenshan Guo , Yangyang Fang , Jiayuan Huang , Wangqing Wu （吴旺青）

This study employed a gradient preheating process (from room temperature to 350°C) to assist laser cladding technology, successfully producing a WTaMoNb refractory high-entropy alloy coating on an Inconel 718 substrate. It systematically investigated the cross-scale regulation mechanism of preheating temperature on the coating's macroscopic formation, microstructure, and high-temperature properties. The study reveals that the preheating process significantly suppresses porosity and crack formation by reducing the cooling-solidification rate of the melt pool, thereby enhancing coating formation quality. Phase analysis confirmed that all coatings comprised body centered cubic (BCC) phase, (Ni, Fe) phase, and Fe₇(Nb, Ta)₃ intermetallic compound (IMC). While preheating temperatures did not induce new phase formation, they optimized phase distribution and precipitation ratios by regulating element diffusion kinetics. Increasing preheating temperatures enhanced the diffraction peak intensities of both BCC phases and IMCs to varying degrees. Performance tests revealed that the S4 coating (preheated at 250℃) exhibited the highest microhardness (897.2 HV) due to the combined effect of solid solution strengthening and precipitation strengthening, which was 3.6 times higher than that of the substrate. The high-temperature wear rate (2.39 ×10⁻⁵ mm³/mN) and oxidation weight gain rate (0.29 mg²·cm⁻⁴·h⁻¹) were both optimized to one fifth of the substrate, demonstrating the best high-temperature performance. This study provides a new strategy for the preparation and performance optimization of high-performance refractory high-entropy alloy coatings.

本研究采用梯度预热工艺（从室温到350℃）辅助激光熔覆技术，成功地在Inconel 718基体上制备了WTaMoNb难熔高熵合金涂层。系统研究了预热温度对涂层宏观形成、微观结构和高温性能的跨尺度调节机理。研究表明，预热过程通过降低熔池的冷却凝固速度，显著抑制了气孔和裂纹的形成，从而提高了涂层的形成质量。物相分析证实，所有涂层均由体心立方（BCC）相、（Ni, Fe）相和Fe7(Nb, Ta)3金属间化合物（IMC）组成。虽然预热温度没有诱导新相的形成，但通过调节元素扩散动力学优化了相分布和析出比。随着预热温度的升高，BCC相和IMCs的衍射峰强度都有不同程度的增强。性能测试表明，250℃预热后的S4涂层由于固溶强化和析出强化的共同作用，其显微硬度达到了最高的897.2 HV，是基体硬度的3.6倍。高温磨损率（2.39 ×10−5 mm3/mN）和氧化增重率（0.29 mg2·cm−4·h−1）均达到基体的1 / 5，表现出最佳的高温性能。本研究为高性能耐火高熵合金涂层的制备和性能优化提供了新的思路。

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引用次数: 0

Friction-corrosion behavior of (Ti42.5Zr42.5Nb10Ta5)100-x Mox (x = 0, 5) high-entropy alloys （Ti42.5Zr42.5Nb10Ta5）100-x Mox （x = 0,5）高熵合金的摩擦腐蚀行为

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2026-07-01 Epub Date: 2026-02-02 DOI: 10.1016/j.triboint.2026.111784

Naiyi Lei , Jiaqing Qin , Shaolei Long , Che Zhang , Shengfeng Zhou , Zhentao Yu , Yanliang Yi

Ti-based high-entropy alloys (HEAs), (Ti_42.5Zr_42.5Nb₁₀Ta₅)_100-xMo_x (x = 0, 5), were developed and evaluated for tribocorrosion, mechanical, and corrosion performance under simulated physiological conditions (PBS and SBF at 37 ℃). Both alloys exhibit a single-phase BCC solid-solution structure, and the addition of 5 at% Mo increases the yield strength from 703 ± 14.5 MPa to 925 ± 6.4 MPa while maintaining high ductility. Both alloys show excellent corrosion resistance, which is attributed to the formation of multi-component passive films composed of TiO₂, ZrO₂, Nb₂O₅/ NbO₂, and Ta₂O₅; Mo addition introduces MoO₂ into the passive film, modifying its electrochemical behavior and repassivation capability. Despite slightly higher friction coefficients, the HEAs exhibit significantly lower wear rates than TC4 alloy in both PBS and SBF. Material degradation is governed by a strong tribocorrosion synergy involving wear-induced depassivation and corrosion-assisted material removal. Mo alloying suppresses subsurface cracking and reduces material loss by enhancing mechanical strength and repassivation efficiency. Overall, the superior tribocorrosion performance of TiZrNbTaMo HEAs arises from the coupled effects of microstructural strengthening and passive film stability, highlighting their potential for wear-sensitive biomedical implant applications.

制备了ti基高熵合金（Ti42.5Zr42.5Nb10Ta5）100-xMox (x = 0,5)，并在模拟生理条件（37℃PBS和SBF）下对其摩擦腐蚀、力学性能和腐蚀性能进行了评价。两种合金均为单相BCC固溶组织，添加5 （% Mo）使屈服强度从703 ± 14.5 MPa提高到925 ± 6.4 MPa，同时保持了较高的塑性。两种合金均表现出优异的耐蚀性，这是由于形成了由TiO2、ZrO2、Nb2O5/ NbO2和Ta2O5组成的多组分钝化膜；Mo的加入将MoO2引入钝化膜，改变了钝化膜的电化学行为和再钝化能力。尽管HEAs在PBS和SBF中的摩擦系数略高，但其磨损率明显低于TC4合金。材料降解是由强烈的摩擦腐蚀协同作用控制的，包括磨损引起的脱钝化和腐蚀辅助的材料去除。钼合金通过提高机械强度和再钝化效率来抑制亚表面开裂和减少材料损失。总体而言，TiZrNbTaMo HEAs优异的摩擦腐蚀性能源于微观结构强化和被动膜稳定性的耦合作用，突出了它们在磨损敏感生物医学植入物应用中的潜力。

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引用次数: 0

Unveiling the effects of nanostructure of adsorbed nonionic surfactants on water-based lubrication 揭示了吸附非离子表面活性剂纳米结构对水基润滑的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2026-07-01 Epub Date: 2026-02-04 DOI: 10.1016/j.triboint.2026.111798

Feng Wei , Xinyan Wang , Shuwen He , Wan Yan , Xiaozhi Zhan , Tao Zhu , Hai Xu , Rongsheng Cai , Xuzhi Hu , Feng Zhou

Water-based lubricants hold significant importance across multiple fields due to their environmental benignity, non-flammable safety, excellent thermal conductivity, and cost-effectiveness. However, modern water-based lubricants suffer from severe shortcomings in lubrication efficiency and anti-wear performance, limiting their broader applications. To address this problem, additives such as nonionic surfactants can be added into the formulations. This study investigates the adsorption behaviours of a typical group of nonionic surfactants, alkyl ethoxylates, denoted as C₁₂E_m, (m = 3, 6, 12, 23) on 304 stainless-steel surfaces and their correlation with lubrication performance. By using surface tension measurements, contact angle measurements, friction and wear tests, as well as various surface characterization techniques (such as spectroscopic ellipsometry, quartz crystal microbalance with dissipation, and neutron reflectometry), the intrinsic connection between the molecular structure of nonionic surfactants and their lubrication performance can be revealed. The results demonstrate that the balance between hydrophilic and hydrophobic segments in the molecular structure directly influences their adsorption configuration on metal surfaces, thereby exerting a significant impact on their lubrication and anti-wear performance. Specifically, nonionic surfactants with shorter ethoxylate chain lengths (EO) (e.g., C₁₂E₃) form dense bilayers, providing excellent lubrication and anti-wear effects, whereas those with longer EO chains (e.g., C₁₂E₁₂ and C₁₂E₂₃) exhibit weaker adsorption abilities and inferior lubrication performance. This research not only provides a theoretical basis for the design of high-performance, eco-friendly water-based lubricants but also propels the advancement of environmentally friendly lubricating materials.

水基润滑剂因其环境友好、不易燃、导热性好、成本效益高而在多个领域具有重要意义。然而，现代水基润滑剂在润滑效率和抗磨损性能方面存在严重缺陷，限制了其广泛应用。为了解决这个问题，可以在配方中加入非离子表面活性剂等添加剂。本研究考察了一类典型的非离子表面活性剂烷基乙氧基酸酯（C12Em, (m = 3,6,12,23)）在304不锈钢表面的吸附行为及其与润滑性能的关系。通过表面张力测量、接触角测量、摩擦和磨损测试以及各种表面表征技术（如光谱椭偏仪、耗散石英晶体微天平和中子反射法），可以揭示非离子表面活性剂的分子结构与其润滑性能之间的内在联系。结果表明，分子结构中亲疏水段的平衡直接影响其在金属表面的吸附构型，从而对其润滑和抗磨性能产生重大影响。其中，具有较短乙氧基酸链（EO）的非离子表面活性剂（如C12E3）形成致密的双分子层，具有良好的润滑和抗磨效果，而具有较长EO链的非离子表面活性剂（如C12E12和C12E23）的吸附能力较弱，润滑性能较差。本研究不仅为高性能、环保型水基润滑剂的设计提供了理论依据，也推动了环保型润滑材料的发展。

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