Tribology International最新文献_第7页

The influence of WS2-filled micro-textures on the tribological properties of CuNiAl alloy under dry and oil-lubricated conditions 在干润滑和油润滑条件下，填充ws2微织构对CuNiAl合金摩擦学性能的影响

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2026-01-14 DOI: 10.1016/j.triboint.2026.111705

Pan Li , Po Zhang , Zirui Cao , Qiang Wang , Ting Fu , Xianjuan Pang , Lihua Fu , Zhaobing Cai , Le Gu

{"title":"The influence of WS2-filled micro-textures on the tribological properties of CuNiAl alloy under dry and oil-lubricated conditions","authors":"Pan Li , Po Zhang , Zirui Cao , Qiang Wang , Ting Fu , Xianjuan Pang , Lihua Fu , Zhaobing Cai , Le Gu","doi":"10.1016/j.triboint.2026.111705","DOIUrl":"10.1016/j.triboint.2026.111705","url":null,"abstract":"<div><div>To enhance the tribological properties of CuNiAl, a textured composite surface was fabricated by filling WS<sub>2</sub> solid lubricant (silane coupling method) into micro-dimples with varying area densities (40 %, 45 %, and 50 %). The tribological behaviors of original (No MT), microtextured (MT), and WS<sub>2</sub>-filled microtextured (MT-WS<sub>2</sub>)—were evaluated under dry and oil-lubricated conditions. With a density of 45 %, the MT-WS<sub>2</sub> sample demonstrated the best tribological performance. Under dry conditions, its average friction coefficient (AFC) and wear rate (W<em>R</em>) decreased by 27.87 % and 76.9 %, respectively, compared to the No MT sample, and by 49.16 % and 87.1 %, respectively, compared to the MT sample. Under oil lubrication, the reductions in AFC and W<em>R</em> were 2.96 % and 64.8 % relative to the No MT sample, and 2.81 % and 61.33 % relative to the MT sample. The improvement mechanism involves WS<sub>2</sub> forming a solid lubricating film during dry friction, while in oil, it synergizes with lubricant to create a composite film that significantly enhances wear resistance.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"218 ","pages":"Article 111705"},"PeriodicalIF":6.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981887","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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Study on long-term skid resistance of epoxy asphalt airport pavement based on abrasion difference 基于磨损差的环氧沥青机场路面长期抗滑性能研究

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2026-01-20 DOI: 10.1016/j.triboint.2026.111677

Houzhi Wang , Jiayue Yun , Yunhong Yu , Wei Huang , Sang Luo , Gang Xu , Jun Yang , Guangji Xu

{"title":"Study on long-term skid resistance of epoxy asphalt airport pavement based on abrasion difference","authors":"Houzhi Wang , Jiayue Yun , Yunhong Yu , Wei Huang , Sang Luo , Gang Xu , Jun Yang , Guangji Xu","doi":"10.1016/j.triboint.2026.111677","DOIUrl":"10.1016/j.triboint.2026.111677","url":null,"abstract":"<div><div>The increasing number of heavy aircraft operations continually challenges the skid-resistance performance of airport pavements. Epoxy-asphalt mixtures, renowned for their superior mechanical and durability characteristics, have therefore been adopted widely in runway surfacing. Grounded in the theory of <em>abrasion difference</em>, basalt was combined with steel-slag and limestone aggregates to fabricate six Stone Matrix Asphalt (SMA) at graduated blending ratios. Phase composition was elucidated by X-ray diffraction (XRD), whereas micro-topography and polymer functional groups were examined via scanning-electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR), respectively. The accelerated pavement testing (APT) device (60℃, 2.0 MPa) applied accelerated loading to replicate in-service deterioration. Macroscopic and microscopic skid-resistance indicators-including British Pendulum Number (BPN), Estimated Texture Depth (ETD), Mean Profile Depth (MPD), and profilometric roughness parameters Ra and Rq-were monitored throughout conditioning. When using aggregate proportions with different abrasion resistance, wear is minimized and high surface roughness is maintained by continuously creating new surface textures; however, the addition of more than 50 % limestone reduces the long-term skid resistance of the surface. The investigation shows that the pronounced hardness gradient among basalt, steel slag, and limestone perpetually regenerates micro-/macro-texture, mitigating wear and sustaining high roughness indices over prolonged trafficking; abrasion difference design of steel slag, limestone, and basalt can satisfy the long-term skid resistance of mixed surfaces at high tire pressures.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"218 ","pages":"Article 111677"},"PeriodicalIF":6.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038928","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

Carbon ion implantation for wear reduction in aerospace gear steel: Multiscale insights from characterization and atomistic simulations 碳离子注入减少航空齿轮钢的磨损：从表征和原子模拟的多尺度见解

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2026-01-17 DOI: 10.1016/j.triboint.2026.111716

Jiangping Zhu , Wen Shao , Tingting Jiang , Jinyuan Tang , Xiaocheng Shen , Yelin Zeng , Yihao Ling

{"title":"Carbon ion implantation for wear reduction in aerospace gear steel: Multiscale insights from characterization and atomistic simulations","authors":"Jiangping Zhu , Wen Shao , Tingting Jiang , Jinyuan Tang , Xiaocheng Shen , Yelin Zeng , Yihao Ling","doi":"10.1016/j.triboint.2026.111716","DOIUrl":"10.1016/j.triboint.2026.111716","url":null,"abstract":"<div><div>Friction and wear in mechanical systems represent pivotal factors contributing to substantial energy dissipation and material failure, particularly under extreme service conditions. Herein, we engineer the surface of high-strength gear steel for aerospace applications via carbon ion implantation to achieve superior mechanical and tribological properties. Results show that at an implantation dose of 2 × 10<sup>17</sup> ions/cm<sup>2</sup>, the nanohardness of the carbon-implanted sample is enhanced by 34.86 %, while the wear rate is reduced by 60 %, relative to unimplanted sample. Leveraging combined characterization experiments and atomistic simulations, we unravel that the improved hardness and wear resistance originate primarily from implantation-induced amorphization, defect structures, lattice distortions, and carbide precipitation. The performance enhancement is attributed to microstructural evolution driven by carbon implantation, which operates through solid-solution strengthening and precipitation strengthening mechanisms. Notably, we report unambiguous yet unexpected evidence supporting these findings. This work provides an intriguing pathway and fundamental insights for developing critical mechanical components with extended longevity and reduced environmental impact.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"218 ","pages":"Article 111716"},"PeriodicalIF":6.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038934","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

Highly graphitized carbonaceous transfer tribofilms tribo-catalyzed by slightly water-soluble additives for reducing friction and wear of polylactic acid 微水溶性添加剂催化高石墨化碳质转移摩擦膜，减少聚乳酸的摩擦磨损

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2026-01-17 DOI: 10.1016/j.triboint.2026.111715

Yong Xu , Shuang Li , Hua Zhong , Kunhong Hu , Tianhui Ren

引用次数: 0

Modeling in tribology: Recent advances, applications, and open questions 摩擦学中的建模：最新进展、应用和悬而未决的问题

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2025-10-30 DOI: 10.1016/j.triboint.2025.111326

Lars Pastewka , Antonis I. Vakis , Stefan J. Eder , Ramin Aghababaei , Andreas Almqvist , Giuseppe Carbone , Michael Chandross , Daniele Dini , Hendrik J. Ehrich , James P. Ewen , Nicola Menga , Jean-François Molinari , Gianpietro Moras , Lucia Nicola , Marco Paggi , Carmine Putignano , Michele Scaraggi , Vladislav A. Yastrebov , Martin H. Müser

{"title":"Modeling in tribology: Recent advances, applications, and open questions","authors":"Lars Pastewka , Antonis I. Vakis , Stefan J. Eder , Ramin Aghababaei , Andreas Almqvist , Giuseppe Carbone , Michael Chandross , Daniele Dini , Hendrik J. Ehrich , James P. Ewen , Nicola Menga , Jean-François Molinari , Gianpietro Moras , Lucia Nicola , Marco Paggi , Carmine Putignano , Michele Scaraggi , Vladislav A. Yastrebov , Martin H. Müser","doi":"10.1016/j.triboint.2025.111326","DOIUrl":"10.1016/j.triboint.2025.111326","url":null,"abstract":"<div><div>Recent advances in modeling have enhanced our ability to make quantitative predictions for tribological phenomena, thereby unraveling relevant mechanisms. Algorithmic innovations, including those based on multiscale methods and machine learning, have been especially impactful, for example in overcoming long-standing bottlenecks that hinder simulations of systems with strong coupling across disparate scales. However, traditional modeling approaches, such as boundary-element techniques, have also progressed and continue to yield new insights. This article reviews developments from the past decade, examining how both new and established methods have deepened our understanding of experimental results and have furthered theoretical approaches in key tribological areas, including contact mechanics, lubrication, metal friction, and tribo-chemistry. Selected applications, such as tunable interfaces and energy harvesting, illustrate the broad influence of recent developments on fields beyond tribology itself.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"218 ","pages":"Article 111326"},"PeriodicalIF":6.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146039435","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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Influence of nitrogen pressure on microstructure, mechanical, and tribocorrosion properties of (Zr,Cr,Al)N coatings on aluminum alloy 氮压力对铝合金（Zr,Cr,Al）N涂层显微组织、力学性能和摩擦腐蚀性能的影响

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2026-01-17 DOI: 10.1016/j.triboint.2026.111720

Yang Ding , Tao He , Xiangyang Du , Alexey Vereschaka , Catherine Sotova , Jian Li , Yuqi Wang , Peiyu He

{"title":"Influence of nitrogen pressure on microstructure, mechanical, and tribocorrosion properties of (Zr,Cr,Al)N coatings on aluminum alloy","authors":"Yang Ding , Tao He , Xiangyang Du , Alexey Vereschaka , Catherine Sotova , Jian Li , Yuqi Wang , Peiyu He","doi":"10.1016/j.triboint.2026.111720","DOIUrl":"10.1016/j.triboint.2026.111720","url":null,"abstract":"<div><div>(Zr,Cr,Al)N nanomultilayer coatings were deposited on 7050 aluminum alloy via filtered cathodic vacuum arc and controlled accelerated arc technologies under varying nitrogen pressures (0.33–1.33 Pa). The effects of nitrogen pressure on coating microstructure, mechanical properties, and tribocorrosion behavior were systematically investigated. Microstructural analysis revealed that varying nitrogen pressure induced non-monotonic changes in roughness, thickness, and grain size. At the optimal pressure of 1.00 Pa, the coating formed a dense fcc-ZrN/CrN(111) structure, which yielded a maximum hardness of 29.48 GPa and an adhesion strength of 20.49 N due to enhanced resistance to plastic deformation. Electrochemical tests revealed a minimum <em>I</em><sub><em>corr</em></sub> of 2.30 × 10<sup>−6</sup> A·cm<sup>−2</sup>, confirming superior chemical inertness. Consequently, optimal tribocorrosion performance was achieved in a 3.5 wt% NaCl solution: the coefficient of friction was as low as 0.271, and the wear rate reached 2.42 × 10<sup>−5</sup>mm<sup>3</sup>·(N·m)<sup>−1</sup>. Relative to the aluminum alloy, the wear rate decreased by approximately two orders of magnitude. The coated samples exhibited combined mechanisms of abrasive wear, adhesive wear, and corrosion–erosion wear. In conclusion, this study demonstrates that (Zr,Cr,Al)N nanomultilayer coatings deposited at 1.00 Pa are promising candidates for protecting aluminum-alloy components against synergistic wear-corrosion damage.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"218 ","pages":"Article 111720"},"PeriodicalIF":6.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146039429","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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Modeling with experimental validation of power loss in high-speed rolling bearings with oil-jet lubrication for helicopter transmission systems 直升机传动系统油喷射润滑高速滚动轴承功率损失建模与实验验证

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2026-01-27 DOI: 10.1016/j.triboint.2026.111762

Pengfei Zhou, Jie Ling, Ruifeng Zhao

{"title":"Modeling with experimental validation of power loss in high-speed rolling bearings with oil-jet lubrication for helicopter transmission systems","authors":"Pengfei Zhou, Jie Ling, Ruifeng Zhao","doi":"10.1016/j.triboint.2026.111762","DOIUrl":"10.1016/j.triboint.2026.111762","url":null,"abstract":"<div><div>Targeting the critical need for efficiency and thermal management in helicopter transmission systems, this study focuses on the power loss of high-speed rolling bearings under oil-jet lubrication — a dominant lubrication method in such systems. To address this issue, this paper establishes a localized mathematical model for predicting the power loss of rolling bearings under oil-jet lubrication. The model’s completeness is enhanced by incorporating two key mechanisms: the dynamic load effect on rolling elements at high speeds and the oil shear drag loss at the bearing inlet interface. Based on this model, the power losses of several typical bearing types under identical operating conditions with low radial load are calculated. To validate the model, a dedicated test rig was built to conduct oil-jet lubrication experiments under the same low-load condition. Although this specific loading condition imposes certain limitations on the model’s applicability, the experimental results can still be used for model verification. The results show that the theoretical predictions agree well with the experimental data in overall trend. Further analysis reveals the variation patterns of individual loss sources with rotational speed, particularly the contribution proportion of the newly introduced power loss terms, thereby validating the correctness and necessity of the supplemented mechanisms. This study provides a generalized model and a theoretical basis for optimal bearing selection and loss suppression, directly supporting efficiency improvements in helicopter transmissions.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"218 ","pages":"Article 111762"},"PeriodicalIF":6.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079844","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

Fractal tangential stiffness model of the joint surface considering stick–slip characteristics at asperity interfaces 考虑粗糙界面粘滑特性的节理面分形切向刚度模型

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2026-01-23 DOI: 10.1016/j.triboint.2026.111743

Hui Xiao , Yongsheng Zhao , Ying Li , Lele Liu , He Ma , Qiang Cheng , Zhifeng Liu

{"title":"Fractal tangential stiffness model of the joint surface considering stick–slip characteristics at asperity interfaces","authors":"Hui Xiao , Yongsheng Zhao , Ying Li , Lele Liu , He Ma , Qiang Cheng , Zhifeng Liu","doi":"10.1016/j.triboint.2026.111743","DOIUrl":"10.1016/j.triboint.2026.111743","url":null,"abstract":"<div><div>In high-end CNC equipment systems, the tangential stiffness of bolted joint surfaces is a key mechanical parameter governing assembly performance and dynamic stability. To address the limitation of conventional models in describing partial slip behavior at contact interfaces, this study proposes a tangential stiffness model for joint surfaces by analyzing the coupled evolution mechanism of adhesion and slip regions of asperities. First, based on the evolution of interfacial slip, a slip ratio is introduced as a key state parameter, and fractal tangential stiffness models for a single asperity and for the joint surface are established. By coupling the asperity size effect with the slip ratio, the multiscale deformation modes of the joint surface are revealed. On this basis, the influences of relevant parameters on tangential stiffness are systematically investigated. The results show that the tangential stiffness varies nonlinearly with the fractal dimension <span><math><mi>D</mi></math></span> and the slip ratio <span><math><mi>s</mi></math></span>, reaching a peak at approximately <span><math><mrow><mi>D</mi><mo>=</mo><mn>2.5</mn></mrow></math></span>, and exhibiting fluctuations with changes in the fractal roughness <span><math><mi>G</mi></math></span>. An increase in the slip ratio effectively enhances the tangential stiffness, and this enhancement becomes more pronounced with increasing <span><math><mi>D</mi></math></span>. Finally, an experimental setup is established and comparisons with conventional models are performed, verifying the accuracy and applicability of the proposed model. The results provide theoretical support for contact performance analysis and assembly optimization of mechanical joint surfaces.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"218 ","pages":"Article 111743"},"PeriodicalIF":6.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079889","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

In-situ self-sensing method for magnetically controlled friction of magnetorheological elastomers and experimental verification 磁流变弹性体磁控摩擦的原位自传感方法及实验验证

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2026-01-09 DOI: 10.1016/j.triboint.2026.111693

Rui Li , Yuqi He , De Zhang , Ping-an Yang , Qiao Chen , Xinglong Gong , Chul-Hee Lee , Mengjie Shou

{"title":"In-situ self-sensing method for magnetically controlled friction of magnetorheological elastomers and experimental verification","authors":"Rui Li , Yuqi He , De Zhang , Ping-an Yang , Qiao Chen , Xinglong Gong , Chul-Hee Lee , Mengjie Shou","doi":"10.1016/j.triboint.2026.111693","DOIUrl":"10.1016/j.triboint.2026.111693","url":null,"abstract":"<div><div>Conventional rubber materials lack the capability for in situ and real-time perception of interfacial friction states, limiting their applications in intelligent fields such as adaptive friction control. To address this limitation, this study proposes a magnetorheological elastomer (MRE) composite system embedded with a flexible sensor array, enabling in situ self-sensing and active regulation of frictional states. A beam–spring interfacial mechanics model is developed to establish a multiscale coupling mapping among normal pressure, tangential friction, internal deformation, and relative resistance variation, elucidating the fundamental mechanism of friction modulation under a magnetic field. A flexible fiber sensor based on graphene/polydimethylsiloxane (GR/PDMS) is fabricated, demonstrating high sensitivity (GF = 73.75, <span><math><mrow><msup><mrow><mi>R</mi></mrow><mn>2</mn></msup><mo>=</mo><mn>0.951</mn></mrow></math></span>), excellent cyclic stability (>3000 cycles), and a wide linear response range, while preserving the elastic modulus and load-bearing capacity of the rubber matrix. Furthermore, an in situ sliding friction testing platform is established to evaluate the self-sensing capability of the MRE under varying normal pressures (1–3 N), sliding paths (linear and diagonal), and magnetic flux densities (0–270 mT). The results show excellent agreement between the measured and predicted friction forces, confirming the accuracy and reliability of the MRE composite structure for in situ friction state identification.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"218 ","pages":"Article 111693"},"PeriodicalIF":6.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079894","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

Self-reactive lubricating graphite-like coating for low-friction hydraulic energy converters 低摩擦液压能量转换器用自反应润滑类石墨涂层

IF 6.1 1区工程技术

Tribology International Pub Date : 2026-06-01 Epub Date: 2026-01-23 DOI: 10.1016/j.triboint.2026.111749

Xiaolong Zhang , Kaiming Zheng , Junhui Zhang , Jianxiong Wu , Hongbin Lin , Xiaojiang Lu , Bing Xu , Chao Zhang

{"title":"Self-reactive lubricating graphite-like coating for low-friction hydraulic energy converters","authors":"Xiaolong Zhang , Kaiming Zheng , Junhui Zhang , Jianxiong Wu , Hongbin Lin , Xiaojiang Lu , Bing Xu , Chao Zhang","doi":"10.1016/j.triboint.2026.111749","DOIUrl":"10.1016/j.triboint.2026.111749","url":null,"abstract":"<div><div>Hydraulic energy converters are components that can realize the conversion between mechanical energy and hydraulic energy. Their powers can be as high as 2 × 10<sup>6</sup> W or more. For a high-power component, even if its efficiency is increased by 1 %, it will bring huge energy savings. However, current research mainly focuses on improving the efficiency of high-speed hydraulic energy converters via enhancing hydrodynamic effect, with little attention paid to low-speed hydraulic energy converters (<500 r/min). For that, this study develops a self-reactive lubricating graphite-like coating specifically for hydraulic energy converters to reduce mechanical friction that leads to low efficiency at low speeds. The self-reactive lubricating graphite-like coating is composed of two elements: carbon and tungsten. The results of the ring-block tests show that the coating with an atomic ratio (carbon: tungsten) of 0.51:0.49 has lower friction and temperature rise under three load conditions. Its mechanism is that an appropriate content of tungsten can react with additives in hydraulic oil to form a lubricating film, such as WS<sub>2</sub> and PO<sub>3</sub><sup>-</sup>, thereby reducing friction. Afterwards, the preferred coating is applied to the pistons in a high-power cam-lobe hydraulic motor. The friction torque of the piston-roller friction pairs is tested on a homemade quasi-actual testing rig, and the results showed that the self-reactive lubricating graphite-like coating could reduce the friction torque by 14 %. The present study provides a new approach to improve the mechanical efficiency of hydraulic energy converters, and can also increase the starting torque to reduce the installed power.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"218 ","pages":"Article 111749"},"PeriodicalIF":6.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079919","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