Tribology Letters最新文献_第7页

Numerical Simulation of Lubricating Grease with Viscoelasticity in the Cone Penetration Test and the Stringiness Test 粘弹性润滑脂在圆锥体穿透试验和粘弹性试验中的数值模拟

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2026-06-01 DOI: 10.1007/s11249-026-02145-w

Kazuya Yamamoto, Takashi Noda

引用次数: 0

Surface Wetting Influenced Drop Contact in Immiscible Liquid 非混相液体中表面润湿影响液滴接触

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2026-05-25 DOI: 10.1007/s11249-026-02154-9

Jiang Li, Xiaohe Li, Zequn Gao, Haosheng Chen

{"title":"Surface Wetting Influenced Drop Contact in Immiscible Liquid","authors":"Jiang Li, Xiaohe Li, Zequn Gao, Haosheng Chen","doi":"10.1007/s11249-026-02154-9","DOIUrl":"10.1007/s11249-026-02154-9","url":null,"abstract":"<div><p>The behavior of liquid drops contacting a solid surface in an immiscible liquid is critical across various applications, notably within the rapidly advancing field of embedded 3D printing. However, the influence of the surface wetting condition and the viscous surrounding liquid on the contact of the drop remains unclear. Here, the contact process of water drops on hydrophilic and hydrophobic surfaces has been observed using an interference method. In contrast to rapid spreading on a hydrophilic glass surface, a drop on a hydrophobic PDMS surface displays a distinctive multi-point contact mode, leading to the entrapment of the surrounding liquid. The underlying mechanism is the Rayleigh-Plateau instability of the water/oil interface, and the slow spreading of the contact line on a hydrophobic surface is also a necessary condition. This study not only elucidates the distinct contact mode of drops under varying surface wetting conditions, but also contributes to the improvement of embedded 3D printing technology.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Free-Colloidal Probe Lateral Force Microscopy (fCP-LFM) for Nanotribology of Sliding and Rolling Contacts 自由胶体探针侧向力显微镜（fCP-LFM）用于滑动和滚动接触的纳米摩擦学。

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2026-05-19 DOI: 10.1007/s11249-026-02147-8

Simon Scherrer, Noé Margni, Kristian Skailand, Minghan Hu, Robert W. Style, Shivaprakash N. Ramakrishna, Lucio Isa

{"title":"Free-Colloidal Probe Lateral Force Microscopy (fCP-LFM) for Nanotribology of Sliding and Rolling Contacts","authors":"Simon Scherrer, Noé Margni, Kristian Skailand, Minghan Hu, Robert W. Style, Shivaprakash N. Ramakrishna, Lucio Isa","doi":"10.1007/s11249-026-02147-8","DOIUrl":"10.1007/s11249-026-02147-8","url":null,"abstract":"<div><p>While sliding friction at the nanoscale is routinely measured by colloidal probe lateral force microscopy (CP-LFM), measuring rolling friction at this scale remains challenging due to the difficulty of resolving lateral forces and particle rotation under well-defined normal loads. Here, we present an extension of a recently published platform that uses free-colloidal probes to enable quantitative measurements of both sliding and rolling friction at individual particle–substrate contacts. Our approach combines a custom-made colloidal probe with a holder for free particle rotation with lateral force detection and optical particle tracking. The modular holder design is compatible with particles of different sizes and materials, enabling studies of many systems of interest. We functionalize the holder surface using a lubricious poly(ethylene-glycol) (PEG) brush to minimize the internal friction of the free-moving particle within and extend the regime in which rolling friction can be measured. In addition, we present a scalable synthesis route for smooth, polymeric particles with tunable size (3–8 <span>(mu )</span>m) and anisotropic fluorescence, enabling direct tracking of particle rotation without modifying native surface properties. Together, these developments establish free-colloidal probe LFM, or fCP-LFM, as a robust and adaptable tribological platform for quantifying friction at the microscale under different modes of relative motion, suitable for systematic studies of nanoscale particle–surface interactions across a wide range of materials and conditions.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13186866/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147986093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Skin Moisture on Friction-Induced Pain: In Vivo Measurement from Skin to Brain Activation 皮肤水分对摩擦引起的疼痛：从皮肤到大脑激活的体内测量

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2026-05-18 DOI: 10.1007/s11249-026-02153-w

Xingxing Fang, Wei Tang, Abdunabi Abduraufovich Kosimov, Abdullo Mamadamon, Shousheng Zhang

{"title":"Skin Moisture on Friction-Induced Pain: In Vivo Measurement from Skin to Brain Activation","authors":"Xingxing Fang, Wei Tang, Abdunabi Abduraufovich Kosimov, Abdullo Mamadamon, Shousheng Zhang","doi":"10.1007/s11249-026-02153-w","DOIUrl":"10.1007/s11249-026-02153-w","url":null,"abstract":"<div><p>Excessive friction and elevated moisture in various skin–product interactions are critical physical factors in the development of skin pain or injuries. In this study, the impacts of skin moisture on friction-induced pain were targeted at the interface between residual limb skin and prosthetic socket based on subjective evaluation, skin friction, and neurophysiological responses of the brain. It showed that, compared with dry skin, the skin hydration and softening resulting from a moist environment increased the contact area, adhesion force, and friction of skin with silicone and foam liners. The subjective pain sensation and the stress acting on nerve endings induced by the frictional stimulation in moist conditions were higher than in dry conditions. Frictional pain can induce an enhancement in oxygenated hemoglobin (HbO) concentration, a decrease in power spectral density (PSD) within <i>α</i> bands, and an increase in <i>β</i>-PSD of electroencephalogram (EEG) signals, suggesting that attention was modulated by pain stimulation to facilitate neural processing response to pain. The brain response evoked by frictional pain under moist conditions was more intense and activated a wider range of brain regions. The findings proved the increased sensitivity of the skin surface and brain response to frictional pain under perspiration conditions. This study is helpful to understand the roles of skin moisture on frictional pain generation mechanisms from skin surface to brain response and to avoid further skin injury in various skin–product interactions as well as to provide theoretical guidance for the use of prosthetics.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147959065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Evolution of the Contact Between Rough Viscoelastic Solids After Decreasing Loads: Memory Erasure and Monotonic Increase 减载后粗糙粘弹性固体间接触的演化：记忆擦除和单调增加

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2026-05-14 DOI: 10.1007/s11249-026-02125-0

Zichen Li, Renald Brenner, Lucas Frérot

{"title":"Evolution of the Contact Between Rough Viscoelastic Solids After Decreasing Loads: Memory Erasure and Monotonic Increase","authors":"Zichen Li, Renald Brenner, Lucas Frérot","doi":"10.1007/s11249-026-02125-0","DOIUrl":"10.1007/s11249-026-02125-0","url":null,"abstract":"<div><p>The real area of contact governs, in part, the magnitude of the friction force, yet its time evolution in rough viscoelastic interfaces remains incompletely understood. In experiments of contact between polymethylmethacrylate blocks under decreasing normal loads, Dillavou and Rubinstein have shown that the true contact area exhibits, after unloading, a decreasing phase and long-term memory of the contact state prior to unloading. It is, however, unclear what modeling ingredients are necessary to reproduce these two features. Here, we investigate these effects using fractional viscoelastic rough contact models. By adapting existing contact theories and numerical simulation methods to fractional viscoelasticity, which induces a wide relaxation spectrum, we reproduce logarithmic aging under constant load, but show that memory of the contact state is erased upon unloading. Indeed, the contact area behaves as if it had always experienced the reduced load, even on short timescales, contrasting with the response of a standard linear solid. Moreover, none of our results show a decreasing regime of the contact area after unload: we ultimately prove that this is the case for all linear viscoelastic models—despite capturing logarithmic aging—leading to the conclusion that additional local internal variables are required to explain both long-term contact memory and contact area reduction after unloading.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147938428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Scuffing: Material Phenomena, Interfacial Effects, and Mitigating Practices 磨损：材料现象、界面效应和缓解措施

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2026-05-12 DOI: 10.1007/s11249-026-02144-x

Brian Delaney, Andre Ellini, Jonathan Kim, Mark Zhang, Neethu Nazar, Naia Daley, Damian Gonzalez, Anthony Shilati, Luke Batteas, Ethan Boris, Nicolas Antezano, Anjali Shah, Sairam Umakanth, Pu You, Zaid Al-Hassan, Shuangbiao Liu, Q. Jane Wang

{"title":"Scuffing: Material Phenomena, Interfacial Effects, and Mitigating Practices","authors":"Brian Delaney, Andre Ellini, Jonathan Kim, Mark Zhang, Neethu Nazar, Naia Daley, Damian Gonzalez, Anthony Shilati, Luke Batteas, Ethan Boris, Nicolas Antezano, Anjali Shah, Sairam Umakanth, Pu You, Zaid Al-Hassan, Shuangbiao Liu, Q. Jane Wang","doi":"10.1007/s11249-026-02144-x","DOIUrl":"10.1007/s11249-026-02144-x","url":null,"abstract":"<div><p>Scuffing is a catastrophic surface failure mode of surfaces in lubricated sliding interfaces, characterized by sudden increases in friction, interfacial temperature, vibration, and noise. Despite decades of study, its underlying mechanisms remain incompletely resolved due to the complex interplay of adhesion, thermal effects, tribochemistry, plastic deformation, and lubricant failure. This review consolidates current understanding of scuffing through an interdisciplinary lens, examining key contributing factors including material adhesion, flash temperatures, surface roughness and directionality, lubricant degradation and desorption, tribochemical film dynamics, and stick–slip behavior. By integrating theoretical, computational, and experimental perspectives, this work surveys proposed scuffing criteria, failure precursors, and mitigation strategies. Scuffing mechanics modeling was one of the foci of Professor Johnson’s work; this paper follows his footprint toward the understanding, modeling, and prevention of scuffing in high-performance tribological systems.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11249-026-02144-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147937789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the Friction-Reducing and Wear-Resistant Properties of the PEG–PILs–TAB Ternary Hybrid Lubrication System and Analysis of Its Mechanism PEG-PILs-TAB三元复合润滑系统的减摩耐磨性能研究及机理分析

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2026-05-11 DOI: 10.1007/s11249-026-02149-6

Longbo Xu, Quanwei Yang, Jiajie Tang, Xiangpeng Yu, Xiuru Li, Jingyang Feng, Zhaocheng Wei

{"title":"Study on the Friction-Reducing and Wear-Resistant Properties of the PEG–PILs–TAB Ternary Hybrid Lubrication System and Analysis of Its Mechanism","authors":"Longbo Xu, Quanwei Yang, Jiajie Tang, Xiangpeng Yu, Xiuru Li, Jingyang Feng, Zhaocheng Wei","doi":"10.1007/s11249-026-02149-6","DOIUrl":"10.1007/s11249-026-02149-6","url":null,"abstract":"<div><p>Owing to the challenging machinability of titanium alloys with poor thermal conductivity and high chemical reactivity, accelerated tool wear imposes stringent demands on cutting fluid lubrication. To develop a high-lubricity fluid for titanium alloy machining, this study constructed a ternary hybrid lubrication system of polyethylene glycol 600 (PEG 600), protic ionic liquids (PILs), and triethanolamine borate (TAB) via tribological tests. Evaluation of its friction-reducing and wear-resistant properties on a titanium alloy-cemented carbide pair determined the optimal concentrations of 8% PILs and 10% TAB. Under testing conditions of 100 °C and 100 N, this system achieved a 69.5% reduction in the friction coefficient and a 51.7% wear volume decrease compared to conventional PEG 600 solution. It also showed reductions of 34.1% in the friction coefficient and 20.1% in the wear volume relative to the formulated binary hybrid lubrication system. At 700 °C and 100 N, the system lowered the friction coefficient by 33.8% and the wear volume by 29.1% versus the formulated binary hybrid lubrication system. The lubrication mechanism investigation revealed that the outstanding performance stems from a robust lubricating film formed synergistically. This film integrates a dynamic hydrogen-bond network from PEG 600, a dense electrostatic adsorption layer from the PILs, and titanium borate generated in situ on the titanium alloy by TAB at high temperatures. This study provides a viable technical strategy and a solid theoretical foundation for developing high-performance cutting fluids specifically designed for titanium alloys.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147937849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Liquid-Phase Deposition of Carbonaceous Polymeric Films from Cycloalkane Additives on Steel Surfaces 环烷烃添加剂在钢表面液相沉积碳质聚合物膜的研究

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2026-05-08 DOI: 10.1007/s11249-026-02151-y

Zaid A. Al Hassan, Harry Wise, Tobias Martin, Stephen Berkebile, Q. Jane Wang, Yip-Wah Chung

{"title":"Liquid-Phase Deposition of Carbonaceous Polymeric Films from Cycloalkane Additives on Steel Surfaces","authors":"Zaid A. Al Hassan, Harry Wise, Tobias Martin, Stephen Berkebile, Q. Jane Wang, Yip-Wah Chung","doi":"10.1007/s11249-026-02151-y","DOIUrl":"10.1007/s11249-026-02151-y","url":null,"abstract":"<div><p>This study investigates the liquid-phase deposition (LPD) of carbonaceous tribopolymeric films from cyclopropane-carboxylic acid (CPCa), an additive dissolved in polyalphaolefins, under boundary-lubricated sliding conditions. In this approach, the lubricant acts as a carrier for a reactive chemical precursor, while the sliding contact functions as a tribochemical reactor that drives in-situ film formation. Ball-on-disk sliding experiments were conducted using n-dodecane containing 5 wt.% CPCa on AISI 52100 and D2 steels of identical hardness but different chromium content. The addition of CPCa reduced wear coefficients by approximately an order of magnitude on both steels. Raman spectroscopy confirmed the formation of disordered, sp<sup>2</sup>-rich carbon tribopolymeric films that were soluble in dichloromethane, distinguishing them from conventional PVD/CVD-deposited amorphous carbon coatings. Confocal profilometry revealed heterogeneous tribofilm thicknesses of ~ 100 nm within the contact. Upon CPCa removal from the lubricant, these tribofilms acted as sacrificial, wear-protective layers, with substantially greater durability on chromium-rich D2 steel than on 52100 steels. These results demonstrate that CPCa-derived tribopolymeric films can be formed rapidly by liquid-phase deposition and provide effective wear protection, highlighting tribocatalysis with appropriate chemical precursors as a promising pathway for replenishable, in-situ carbon coatings.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11249-026-02151-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147830105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of Grease Rheology at Extremely Large Shear Rates and its Correlation with Tribological Behavior in the Isoviscous-Rigid Regime 大剪切速率下润滑脂流变学预测及其与等粘-刚性摩擦学行为的关系

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2026-05-06 DOI: 10.1007/s11249-026-02146-9

Mohd. Mubashshir, Sagar B. Kale, Asima Shaukat

{"title":"Prediction of Grease Rheology at Extremely Large Shear Rates and its Correlation with Tribological Behavior in the Isoviscous-Rigid Regime","authors":"Mohd. Mubashshir, Sagar B. Kale, Asima Shaukat","doi":"10.1007/s11249-026-02146-9","DOIUrl":"10.1007/s11249-026-02146-9","url":null,"abstract":"<div><p>Lubricating greases exhibit far more complex tribological behavior than lubricating oils due to their biphasic composition and non-Newtonian rheology. In the hydrodynamic regime, where a full grease film separates the moving surfaces, the tribological response is governed by the rheological dynamics of grease within the contact zone. However, these dynamics are hard to measure directly since the shear rates inside tribocontacts far exceed those accessible on conventional rheometers. To address this, a rheological superposition technique is employed to extend grease flow curves to such extremely high shear rates. The friction‒speed curves for all the grease samples are generated using a ball-on-disc tribometer operating under the isoviscous-rigid regime (low contact pressure and constant temperature). Simultaneously, the variation of electrical contact resistance with speed is recorded. The effective viscosity of each sample in the hydrodynamic lubrication regime is estimated by superposing the hydrodynamic portion of the friction curve onto a master curve. Remarkably, the effective viscosities agree closely with the infinite shear viscosities determined from the superposition method. At high speeds, however, deviations emerge: the effective viscosity falls below the infinite-shear viscosity, indicating a departure from classical hydrodynamic behavior. To our knowledge, this is the first report of a quantitative correlation between grease hydrodynamic lubrication and high-shear rheology. In the boundary regime, the base oil properties, particularly its molecular structure and physicochemical interactions with the contact surface, as well as the morphology and concentration of the thickener, govern the film formation and friction response. These insights offer guidance for formulating greases with tailored properties to optimize lubrication performance.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Influence of Trace Moisture on the Tribological Behavior of PTFE/PPS Composite in High-Purity Hydrogen Atmosphere 微量水分对PTFE/PPS复合材料在高纯氢气气氛中摩擦学性能的影响

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2026-05-01 DOI: 10.1007/s11249-026-02148-7

Yue He, Hironori Shinmori, Takehiro Morita, Kanao Fukuda, Yoshinori Sawae

{"title":"Influence of Trace Moisture on the Tribological Behavior of PTFE/PPS Composite in High-Purity Hydrogen Atmosphere","authors":"Yue He, Hironori Shinmori, Takehiro Morita, Kanao Fukuda, Yoshinori Sawae","doi":"10.1007/s11249-026-02148-7","DOIUrl":"10.1007/s11249-026-02148-7","url":null,"abstract":"<div><p>High-purity hydrogen is essential in fuel cell vehicles (FCVs), which require strict control of impurities, including residual moisture content. Therefore, it is imperative to thoroughly investigate the influence of trace moisture on the friction and wear behaviors of tribomaterials. In this study, the friction and wear behaviors of polytetrafluoroethylene (PTFE) composites containing 20% of polyphenylene sulfide (PPS) in a high-purity hydrogen gas environment were investigated under various contact pressures, sliding speeds, and trace-moisture contents at the parts per million (ppm) level. A pin-on-disk tribometer installed in a high-vacuum chamber was used for the tests, and the disk material was SUS440C stainless steel. The results revealed that the trace-moisture content significantly affected the wear rates of the PTFE/PPS composites. At a moisture content of ~ 20 ppm, the wear rate was reduced to one-tenth the wear rate at a low-moisture content of ~ 1 ppm. This reduction is attributed to the effective formation of a PTFE-based transfer film supported by interfacial tribochemical reactions, accompanied by the formation of metal fluorides. Conversely, at a moisture content of 1 ppm, insufficient stabilization of the PTFE transfer film leads to the adhesion of PPS to the counterface, resulting in increased wear. Despite the variations in wear rates, the friction coefficient remained relatively invariant, regardless of the moisture level. These findings highlight that even trace amounts of moisture, often neglected owing to the assumption of hydrogen purity, can critically affect tribological performance. Without understanding this moisture effect, severe wear may occur unexpectedly, which poses a risk for FCV-related hydrogen systems.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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