Tribology International最新文献_第4页

Research on the shape-dependence of nano-copper and the friction and lubrication mechanisms under the synergistic effect of multiple shapes 纳米铜的形状依赖性及多形状协同作用下的摩擦润滑机理研究

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-07-01 Epub Date: 2026-02-10 DOI: 10.1016/j.triboint.2026.111832

Jing Xu , Dongxiang Xu , Hao Lu , Junyan Yang , Wissal Mahfoudi , JiaDi Lian

{"title":"Research on the shape-dependence of nano-copper and the friction and lubrication mechanisms under the synergistic effect of multiple shapes","authors":"Jing Xu , Dongxiang Xu , Hao Lu , Junyan Yang , Wissal Mahfoudi , JiaDi Lian","doi":"10.1016/j.triboint.2026.111832","DOIUrl":"10.1016/j.triboint.2026.111832","url":null,"abstract":"<div><div>Based on the molecular dynamics simulation method, a Couette flow boundary lubrication molecular dynamics model was established to investigate the shape-dependence of copper nanoparticles (CuNPs) and the influence of the synergistic effect of multiple shapes on the tribological properties, thus revealing the shape-dependence in single-shape lubrication systems and elucidating the synergistic lubrication mechanism of multi-shape CuNPs. The results showed that in single-shape lubrication systems, lamellar CuNPs exhibited optimal friction-reducing performance during the initial lubrication stage due to their ability to form a lubricating copper film. However, lamellar CuNPs tended to adhere to friction surface asperities in later stages, causing adhesive wear. Columnar CuNPs exacerbated wear depth due to stress concentration at their tips. Spherical CuNPs demonstrated the best overall lubrication and friction-reducing effects due their minimal contact area and resistance to adhesion and particle detachment. Polyhedron CuNPs, being morphologically unstable, gradually transformed into spherical CuNPs. In the multi-shape synergistic lubrication system, the combination of spherical-lamellar CuNPs exhibited the best synergistic lubrication performance, significantly reducing the average frictional force by 36.5 %, normal force by 49 %, and wear rate by 15.7 %. This performance is attributed to the lamellar CuNPs initially formed a stable lubricating film to bear the load, while the spherical CuNPs were subsequently extruded into a secondary dynamic film to fill gaps. Together, they achieved efficient friction reduction and wear resistance by isolating the friction surfaces, enabling atomic-level self-repair, and exhibiting a rolling bearing effect. The aforementioned research provided a theoretical foundation for predicting performance and developing water-based nanoscale lubrication systems.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"219 ","pages":"Article 111832"},"PeriodicalIF":6.1,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Vacuum tribology in space applications: A review of failure mechanisms, solid lubricants, and reliability-centered design 真空摩擦学在空间中的应用：失效机制、固体润滑剂和以可靠性为中心的设计综述

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-07-01 Epub Date: 2026-02-05 DOI: 10.1016/j.triboint.2026.111807

Rashed Kaiser, Andreas A. Polycarpou

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Effect of femtosecond laser microstructuring on tribological properties of CrN coatings under engine lubricants 飞秒激光微结构对发动机润滑油CrN涂层摩擦学性能的影响

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-07-01 Epub Date: 2026-01-22 DOI: 10.1016/j.triboint.2026.111741

Rubenson Mareus , Amaël Caillard , Nadjib Semmar , Lynda Lounis , Anne-Lise Thomann , Loïc Gimenez , Agnès Petit , Matthieu Amigou , Caroline Richard

{"title":"Effect of femtosecond laser microstructuring on tribological properties of CrN coatings under engine lubricants","authors":"Rubenson Mareus , Amaël Caillard , Nadjib Semmar , Lynda Lounis , Anne-Lise Thomann , Loïc Gimenez , Agnès Petit , Matthieu Amigou , Caroline Richard","doi":"10.1016/j.triboint.2026.111741","DOIUrl":"10.1016/j.triboint.2026.111741","url":null,"abstract":"<div><div>This study investigates the triple synergy between physical vapor deposited (PVD) CrN coatings, femtosecond laser surface texturing (LST), and lubricant rheology. CrN coatings were structured with micro-dimples (15 µm and 25 µm diameters) and evaluated under three synthetic lubricants with varying viscosities (VG 100, 5W50, and 5W30) using a high-frequency reciprocating rig (HFRR). The experimental results demonstrate a strong correlation between film resistance (ECR), friction coefficient, and wear volume. VG 100 exhibited the superior performance, achieving an immediate 100 % ECR and the lowest CoF, particularly for the 15 µm textured surface, confirming that this geometry optimizes hydrodynamic lift when combined with high-viscosity lubricants. However, a significant tribological trade-off was observed with lower viscosity oils. While the 15 µm texture eventually reduces friction with 5W30 oil, it significantly delays the stabilization of the lubricant film, with a 100 % ECR reached only after a prolonged 800 s \"run-in\" period. This delay under mixed lubrication conditions directly correlates with the higher wear volumes measured for the 5W30 oil. Post-test analysis confirms that the high hardness of the CrN coating (21–30 GPa) is essential to maintain the structural integrity of the dimples, preventing edge collapse during this critical initial contact phase. These findings highlight that laser surface texturing parameters must be carefully tuned to the specific lubricant viscosity to prevent excessive initial wear during the film stabilization phase, providing a roadmap for the design of optimized high-efficiency tribosystems.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"219 ","pages":"Article 111741"},"PeriodicalIF":6.1,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Effect of surface texturing on sliding behaviour of ice adhered to material surfaces 表面纹理对粘附在材料表面的冰滑动行为的影响

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-07-01 Epub Date: 2026-02-12 DOI: 10.1016/j.triboint.2026.111837

Ryo Suzuki , Hideaki Hamachi , Yuta Nakashima , Yoshitaka Nakanishi

{"title":"Effect of surface texturing on sliding behaviour of ice adhered to material surfaces","authors":"Ryo Suzuki , Hideaki Hamachi , Yuta Nakashima , Yoshitaka Nakanishi","doi":"10.1016/j.triboint.2026.111837","DOIUrl":"10.1016/j.triboint.2026.111837","url":null,"abstract":"<div><div>Ice adhesion on material surfaces creates significant safety and performance challenges in transportation, power generation, and infrastructure. Conventional de-icing methods typically rely on thermal input to induce melting, where heating at the ice–surface interface forms a thin water film that lowers shear strength and enables sliding. This study investigates how surface texturing can enhance de-icing efficiency by modulating surface wettability and thermal conductivity. Crown glass and acrylic plates were fabricated with four surface types: untextured (flat), mechanically roughened (rough), cylindrical (disk), and micropillars with rounded tips (rounded). Ice pillars were adhered to these surfaces and heated using a transparent film heater. Sliding initiation time, initiation temperature, and sliding velocity were measured, and surface wettability and water retention were evaluated using contact and sliding angle tests. On glass, thermal conductivity and mechanical interlocking due to surface textures strongly influenced initiation time. On acrylic, wettability dominated: hydrophilic textures promoted interfacial water film spreading and reduced initiation times. After sliding began, water retention governed velocity. Acrylic, which retained more water, exhibited water film breakage and reduced sliding velocity, while textured glass with low water retention achieved the highest velocities. These results demonstrate that surface texturing effectively controls water film formation and ice sliding behaviour, contributing to the development of smoother and more energy-efficient de-icing strategies.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"219 ","pages":"Article 111837"},"PeriodicalIF":6.1,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Experimental analysis of shim–tappet dynamics and friction modifier effects in engine valvetrain using an advanced measurement technique 用先进的测量技术试验分析了发动机气门机构中垫片-挺杆动力学和摩擦调节剂效应

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-07-01 Epub Date: 2026-02-08 DOI: 10.1016/j.triboint.2026.111799

Sehrish Shahnawaz , Riaz Ahmad Mufti , Muhammad Talha Manzoor , Waleed Al-Sallami , Mian Ashfaq Ali , Rehan Zahid , Jawad Aslam , Muhammad Khurram

{"title":"Experimental analysis of shim–tappet dynamics and friction modifier effects in engine valvetrain using an advanced measurement technique","authors":"Sehrish Shahnawaz , Riaz Ahmad Mufti , Muhammad Talha Manzoor , Waleed Al-Sallami , Mian Ashfaq Ali , Rehan Zahid , Jawad Aslam , Muhammad Khurram","doi":"10.1016/j.triboint.2026.111799","DOIUrl":"10.1016/j.triboint.2026.111799","url":null,"abstract":"<div><div>The pursuit for fuel-efficient and durable engines has intensified the need to understand frictional losses in valvetrain systems operating mainly under boundary and mixed lubrication. This study introduces an advanced in-situ technique based on giant magneto-resistive (GMR) chip to directly measure independent tappet and shim rotation linked with friction measurement in a production engine head without altering its geometry. Complementary experiments were conducted on a reciprocating rig using real engine components to validate the findings. Tests with SAE 30 base oil and four friction modifiers namely MoDTC, Molyvan, Polymeric, and an Organic friction modifier (OFM) showed that MoDTC consistently delivered the lowest frictional torque but also suppressed tappet rotation, while the polymeric friction modifier yielded the highest tappet rotation with relatively modest friction reduction across all camshaft speeds and lubricant temperatures. The base oil produced the highest friction torque overall but minimal rotation, demonstrating the strong influence of tappet–bore resistance. Shim rotation was generally low but became significant at low camshaft speed and high lubricant temperature. The analysis revealed that nearly 10 % of cam–tappet friction contributes to tappet rotation, demonstrating that the equilibrium between cam–tappet and tappet–bore friction governs rotational dynamics. Reciprocating tribometer tests verified the friction reducing performance of MoDTC but showed a different ranking for the other modifiers due to the absence of rotational motion. This suggests that reciprocating sliding tribometers may not fully replicate real engine conditions. The results reveal that friction modifiers influence both tribological losses and the coupled rotational dynamics within the valvetrain.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"219 ","pages":"Article 111799"},"PeriodicalIF":6.1,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Coating materials for journal bearings 轴颈轴承用涂层材料

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-07-01 Epub Date: 2026-01-31 DOI: 10.1016/j.triboint.2026.111774

Alberto Betti , Andrea Riva , Paola Forte , Steven Chatterton , Enrico Ciulli

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A numerical solver framework for capturing the dynamic behaviour of oil ring lubricators 捕获油环润滑器动态行为的数值求解框架

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Tribology International Pub Date : 2026-07-01 Epub Date: 2026-02-07 DOI: 10.1016/j.triboint.2026.111809

Alistair McLane, Liuquan Yang, Mark C.T. Wilson

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Influence of annealing and tempering on the wear and corrosion behavior of WC/W2C reinforced composites fabricated by laser powder bed fusion 退火和回火对激光粉末床熔合制备WC/W2C增强复合材料磨损和腐蚀行为的影响

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-07-01 Epub Date: 2026-02-07 DOI: 10.1016/j.triboint.2026.111811

Yiqi Zhou , Ke Sang , Wenqian Wang , Guofeng Zhang , Decheng Kong , Yu Yan , Xiaogang Li , Xuanhui Qu , Chaofang Dong , Zhigang Yang , Hao Chen , Chi Zhang

{"title":"Influence of annealing and tempering on the wear and corrosion behavior of WC/W2C reinforced composites fabricated by laser powder bed fusion","authors":"Yiqi Zhou , Ke Sang , Wenqian Wang , Guofeng Zhang , Decheng Kong , Yu Yan , Xiaogang Li , Xuanhui Qu , Chaofang Dong , Zhigang Yang , Hao Chen , Chi Zhang","doi":"10.1016/j.triboint.2026.111811","DOIUrl":"10.1016/j.triboint.2026.111811","url":null,"abstract":"<div><div>WC/W<sub>2</sub>C particle reinforced stainless steel composites were fabricated via laser powder bed fusion (LPBF) and subsequently heat‑treated under two schemes: direct tempering (200–600 °C) and solution annealing at 1050 °C followed by tempering. The effects of these heat treatments on the microstructure, wear performance, corrosion behaviour, and mechanical properties were systematically investigated. While low‑temperature tempering (≤ 400 °C) promoted carbon redistribution and increased retained austenite from 17.6 % to 61.7 %, tempering at 600 °C—as well as the solution‑annealed and tempered condition—suppressed austenite (≈ 0 %) and triggered extensive precipitation of Cr‑rich carbides. Solution annealing homogenized the matrix, eliminated austenite, and thickened the <em>in-situ</em> reaction layers to ∼5 μm. Intergranular corrosion susceptibility correlated directly with carbide‑induced Cr‑depleted zones, with the highest degree of sensitization (DOS > 220) occurring after the 600 °C and 1050 °C + 600 °C treatments, significantly exceeding that of other conditions (DOS < 150). Wear resistance was governed primarily by matrix hardness; wear volume loss increased markedly from 2 × 10<sup>4</sup> μm<sup>3</sup> to 5 × 10<sup>5</sup> μm<sup>3</sup>, attributed to abrasive carbide debris and thermal softening. Compression tests demonstrated high deformability (> 60 %) after heat treatment; however, the as‑built composite exhibited the highest compressive strength (∼4500 MPa) but underwent premature failure, owing to residual stress.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"219 ","pages":"Article 111811"},"PeriodicalIF":6.1,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Enhancing the tribological performance of polyether ether ketone (PEEK) polymer using carbon-alloyed transition metal dichalcogenide coatings 采用碳合金过渡金属二硫化物涂层提高聚醚醚酮（PEEK）聚合物的摩擦学性能

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2026-01-22 DOI: 10.1016/j.triboint.2026.111739

Talha Bin Yaqub , Abbas AL-Rjoub , Irfan Nadeem , Parveen Kumar , Filipe Fernandes , Todor Vuchkov , Albano Cavaleiro , Mitjan Kalin

{"title":"Enhancing the tribological performance of polyether ether ketone (PEEK) polymer using carbon-alloyed transition metal dichalcogenide coatings","authors":"Talha Bin Yaqub , Abbas AL-Rjoub , Irfan Nadeem , Parveen Kumar , Filipe Fernandes , Todor Vuchkov , Albano Cavaleiro , Mitjan Kalin","doi":"10.1016/j.triboint.2026.111739","DOIUrl":"10.1016/j.triboint.2026.111739","url":null,"abstract":"<div><div>The demand for light-weight polymeric materials such as polyether ether ketone (PEEK) is increasing for advanced engineering components, like polymeric gears. However, the intrinsic limitations of PEEK, including high friction, poor wear resistance, and rapid surface degradation restrict its larger adoption. This work is dedicated towards enhancing the dry sliding performance of PEEK via surface modifications. Direct current magnetron sputtered (DCMS) carbon-alloyed tungsten disulfide (WSC) coatings having C content of ∼52 at. % were deposited on PEEK polymer substrates at low power. Modifications of coating architecture were obtained by depositing coatings with and without inter/gradient layers. Comprehensive post-deposition characterization included chemical composition, cross-section and surface morphology, crystal structure, detailed chemical bonding, and coatings-PEEK adhesion investigations. The coatings were uniform, compact, amorphous, and provided complete surface alteration of PEEK with sufficient coating-polymer adhesion. Under ambient air sliding, the WSC coating with inter/gradient layer architecture exhibited the best performance, by reduction in friction coefficient (COF) and specific wear rate up to ∼34.3 % and ∼98.3 %, respectively relative to the uncoated PEEK. Post sliding Raman and X-ray photoelectron spectroscopy (XPS) revealed that C dominated the role in the reduction of COF and wear through the formation of a stable, partially graphitized tribolayer. This work establishes a scalable pathway for integrating solid-lubricant coatings on polymeric components, opening new opportunities for their reliable use in high-load and energy-efficient industrial systems.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"218 ","pages":"Article 111739"},"PeriodicalIF":6.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Enhanced lubrication in water-lubricated bearings under low-speeds and heavy-loads via secondary lubricant 通过二次润滑剂，在低速和重载条件下增强了水润滑轴承的润滑

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2026-01-22 DOI: 10.1016/j.triboint.2026.111726

Qingchen Liang , Feng Guo , Peng Liang , Chunjiang Guo , Hao Ji , Xiaohan Zhang

{"title":"Enhanced lubrication in water-lubricated bearings under low-speeds and heavy-loads via secondary lubricant","authors":"Qingchen Liang , Feng Guo , Peng Liang , Chunjiang Guo , Hao Ji , Xiaohan Zhang","doi":"10.1016/j.triboint.2026.111726","DOIUrl":"10.1016/j.triboint.2026.111726","url":null,"abstract":"<div><div>To address severe friction challenges in water-lubricated bearings (WLBs) under complex and harsh operating conditions, a scheme is proposed that supplies a trace amount of secondary lubricant (SL) to the bearing within a short time. Preliminary experiments have demonstrated that this approach enhances hydrodynamic load capacity and optimizes the lubrication state of the WLBs. However, the correlation between the SL-assisted water lubrication and the diffusion of the two-phase flow under the low-speed and heavy-load working conditions remains unclear. Therefore, a theoretical model capturing interfacial diffusion of SL in WLBs is developed by coupling the Volume of Fluid (VOF) model with the mixed lubrication model, incorporating elastic deformation of bush and asperity contact. A numerical solver was developed and the calculation results indicate that a trace amount of SL can significantly reduce friction in WLBs under the low-speed and heavy-load conditions. It was shown that the oil injection volume of the SL can be determined in such a way to effectively mitigate its backflow at the entrance, enabling rapid migration of the SL to the contact area. This enhanced flow increases the oil-phase volume fraction in the contact area while reducing severe solid contact occurrences. This study provides a theoretical foundation for the design of WLBs.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"218 ","pages":"Article 111726"},"PeriodicalIF":6.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0