Tribology International最新文献_第9页

Tribological properties and molecular dynamics analysis of citric acid modified 3D porous graphene/carbon black as lubricant additives 柠檬酸改性三维多孔石墨烯/炭黑润滑添加剂的摩擦学性能及分子动力学分析

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-03-18 DOI: 10.1016/j.triboint.2025.110648

Jingjing Fei , Lianfei Zhao , Qingpeng Zheng , Wentian Wei , Lizhe Liang , Zhi Qun Tian

{"title":"Tribological properties and molecular dynamics analysis of citric acid modified 3D porous graphene/carbon black as lubricant additives","authors":"Jingjing Fei , Lianfei Zhao , Qingpeng Zheng , Wentian Wei , Lizhe Liang , Zhi Qun Tian","doi":"10.1016/j.triboint.2025.110648","DOIUrl":"10.1016/j.triboint.2025.110648","url":null,"abstract":"<div><div>Graphene holds significant potential as a green additive for lubricating oils, but its poor dispersion stability limits its applications. In this study, citric acid-modified graphene (CAG) was prepared by modifying 3D porous graphene with citric acid, achieving stable dispersion in lubricating oil for up to six months without the need for dispersants. The lubricating properties were investigated using a four-ball friction tester, and wear scars were characterized using the depth-of-field microscope, Scanning electron microscopy (SEM), and Raman spectroscopy. The experimental results demonstrated that adding a composite (CC) of CAG and carbon black to castor oil reduced the coefficient of friction (COF) and anti-wear by 24.57 % and 70.27 %, respectively, under a load of 392 N. Under a load of 588 N, the COF and anti-wear decreased by 32.59 % and 56.54 %, respectively, while the last non-seizure load (P<sub>B</sub>) increased by 125.26 %. The sheet-like CAG adsorbed onto the friction surface, enhancing the oil film's load-carrying capacity, while the spherical carbon black acted as microbearings, converting part of the sliding friction into rolling lubrication. A synergistic effect between CAG and carbon black was observed, with the composite exhibiting better lubricating performance than either material alone. Moreover, molecular dynamics simulation results revealed that adding CAG alone enhanced the lubricant's adsorption but reduced its mobility. The combined addition of CAG and carbon black retained the improved adsorption while enhancing the lubricant's mobility, further confirming the synergistic action between CAG and carbon black.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"208 ","pages":"Article 110648"},"PeriodicalIF":6.1,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687291","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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The influence of mechanical shearing on the thickener microstructure and properties of Polyurea greases 机械剪切对聚脲润滑脂增稠剂微观结构和性能的影响

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-03-18 DOI: 10.1016/j.triboint.2025.110655

Peng Ding , Wenhui Cao , Qi Ding , Chaobin Liu , Wei Yu , Litian Hu

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Self-lubricating film formation and ultra-low wear of PTFE/aluminum through anodization induced nano-microtextures 阳极氧化诱导纳米微织构聚四氟乙烯/铝的自润滑膜形成及超低磨损

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-03-18 DOI: 10.1016/j.triboint.2025.110657

Shu Yang , Zhenyu Liu , Shaoqi Zhang , Wanshun Wang , Guodian Huang , Longshen Lu , Yingxi Xie

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Study on the material removal mechanism of cemented carbide magnetic materials in magnetic field-assisted mass polishing 磁场辅助团块抛光中硬质合金磁性材料材料去除机理的研究

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-03-18 DOI: 10.1016/j.triboint.2025.110647

Rui Gao , Yee Man Loh , Kangsen Li , Rui Chen , Chen Jiang , Chi Fai Cheung , Chunjin Wang

{"title":"Study on the material removal mechanism of cemented carbide magnetic materials in magnetic field-assisted mass polishing","authors":"Rui Gao , Yee Man Loh , Kangsen Li , Rui Chen , Chen Jiang , Chi Fai Cheung , Chunjin Wang","doi":"10.1016/j.triboint.2025.110647","DOIUrl":"10.1016/j.triboint.2025.110647","url":null,"abstract":"<div><div>Cemented carbides (WC-Co) are crucial in modern engineering due to their exceptional hardness, wear resistance, and toughness, making them ideal for various applications. Despite advancements in polishing techniques, the mechanisms for polishing WC-Co magnetic materials using magnetic field-assisted methods remain inadequately understood. This study addresses these gaps by investigating the material removal mechanism of WC-Co after electrical discharge machining (EDM) using the proposed magnetic field-assisted mass polishing (MAMP) method. A material removal distribution (MRD) model of different magnetic materials was developed to guide the experiments. Key findings include significant reductions in surface roughness, effective removal of oxide layers formed during EDM, and improved polishing uniformity and efficiency. The study also demonstrated the MAMP method’s ability to maintain the form integrity of structured surfaces. This research enhances the understanding of polishing mechanisms for magnetic materials and presents a viable method for improving the surface quality of WC-Co. This research provides valuable insights into the polishing mechanisms of magnetic materials using magnetic field-assisted polishing methods.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"208 ","pages":"Article 110647"},"PeriodicalIF":6.1,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687425","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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Cumulative effect of FexN phases, roughness parameters, and asperity geometry on the anti-wear properties of low-temperature plasma nitrided Ti-Nb stabilized IF steel FexN相、粗糙度参数和粗糙度几何对低温等离子体氮化Ti-Nb稳定IF钢抗磨性能的累积影响

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-03-18 DOI: 10.1016/j.triboint.2025.110652

Bibekananda Sahoo , K. Udaya Bhat

{"title":"Cumulative effect of FexN phases, roughness parameters, and asperity geometry on the anti-wear properties of low-temperature plasma nitrided Ti-Nb stabilized IF steel","authors":"Bibekananda Sahoo , K. Udaya Bhat","doi":"10.1016/j.triboint.2025.110652","DOIUrl":"10.1016/j.triboint.2025.110652","url":null,"abstract":"<div><div>Plasma-driven surface modification techniques like plasma nitriding (PN) are trending, especially for steel products. It is advantageous due to the higher order of process control and superior quality of property enhancement of the surface. This technique often employs a high processing temperature, which is one of its metallurgical and economical limitations. One of the renowned solutions is the implementation of lower processing temperatures. The current work is based on the low-temperature plasma nitriding of Ti-Nb stabilized interstitial-free steel at different processing temperatures ranging from 400 ºC to 500 ºC. The role of Fe<sub>x</sub>N phases, surface roughness parameters, and asperities geometry are thoroughly studied with respect to the anti-wear properties of the surface. The formation of γ′-Fe<sub>4</sub>N and ε-Fe<sub>2–3</sub>N are detected in the XRD plot, whereas α″-Fe<sub>16</sub>N<sub>2</sub> is confirmed in microscopy. The sample treated at 450 ºC presents the best anti-wear properties compared to other samples, primarily due to the presence of prominent ε-Fe<sub>2–3</sub>N phase and blunt surface asperities. A maximum reduction in wear volume of about 3 times the base value is recorded in the wear test. The microscopic and elemental analyses are conducted on the wear scars, wear debris, and counter-body worn-out surfaces to study the wear mechanism comprehensively. The work tries to illustrate the wear mechanisms schematically to understand the conceptual grounds associated with such theories. The spectrometric analysis in the depth direction is also performed, and it detects the trace of nitrogen up to about 7 µm depth for 500 ºC nitriding conditions.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"208 ","pages":"Article 110652"},"PeriodicalIF":6.1,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687183","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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Achieving oil-based superlubricity with near-zero wear via synergistic effect between PEEK-PTFE and PAO40 containing DDP-Cu nanoparticles 通过PEEK-PTFE和含有DDP-Cu纳米颗粒的PAO40之间的协同作用，实现接近零磨损的油基超润滑

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-03-17 DOI: 10.1016/j.triboint.2025.110645

Shanshan Li , Chuanping Gao , Chunjian Duan , Shengmao Zhang , Pingyu Zhang , Zhijun Zhang

{"title":"Achieving oil-based superlubricity with near-zero wear via synergistic effect between PEEK-PTFE and PAO40 containing DDP-Cu nanoparticles","authors":"Shanshan Li , Chuanping Gao , Chunjian Duan , Shengmao Zhang , Pingyu Zhang , Zhijun Zhang","doi":"10.1016/j.triboint.2025.110645","DOIUrl":"10.1016/j.triboint.2025.110645","url":null,"abstract":"<div><div>Oil-based superlubricity introduces a novel approach to energy conservation. Facing two main obstacles at present, i.e., higher viscosity of lubricating oil and special tribopairs, a novel solid-liquid combined system is built in this work, which is mainly based on excellent tribological property of oil-soluble dialkyl-dithiophosphoric-modified Cu nanoparticles (DDP-Cu NPs) and superior self-lubricating capability of polymeric tribopairs. In this system, polyetheretherketone (PEEK) is coupled with polytetrafluoroethylene (PTFE) to form a similar/dissimilar tribopair; and neat PAO40 (a real serving lubricating oil with high viscosity in poly-alpha olefin oil family), or PAO40 containing oil-soluble DDP-Cu NPs (PAO40 + Cu), is used as a lubricant during the sliding test. The results show that only dissimilar tribopair, i.e., PEEK-PTFE, can achieve oil-based superlubricity under the selected sliding conditions, which can be attributed to the synergistic effect between PEEK-PTFE tribopair and PAO40/PAO40 + 0.25 Cu. Furthermore, due to lower cohesive energy density (CED), PTFE is more likely to be transferred onto PEEK together with some tribochemical reactions, finally generating a high-performance tribofilm rich in carboxylated PTFE. In addition, it is concluded that, when lubricated with PAO40, the above synergistic effect is a key to achieve superlubricity; and for PAO40 + 0.25 Cu, the carboxylated PTFE and the exposed Cu core will create chelate effect, which can not only further enhance this synergistic effect, but also improve the wear-resistance of the system reaching near-zero wear. This work not only provides a novel idea for designing oil-based superlubricity system, but broadens the type of tribopair materials achieving oil-based superlubricity to some extent.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"208 ","pages":"Article 110645"},"PeriodicalIF":6.1,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687276","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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Discussion of “Prediction of pavement friction coefficient based on dynamic friction test simulation” “基于动摩擦试验模拟的路面摩擦系数预测”的探讨

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-03-16 DOI: 10.1016/j.triboint.2025.110649

Yunwei Meng , Zixiao Wang , Hang Lu

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Review of tribological considerations in solid oxide fuel cells 固体氧化物燃料电池摩擦学研究综述

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-03-15 DOI: 10.1016/j.triboint.2025.110641

Annanthan Narayanasamy , Nurul Akidah Baharuddin , Afifah Z. Juri

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Data-driven analysis of magnetorheological fluid seal degradation for performance prediction 基于数据驱动的磁流变流体密封性能退化分析

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-03-15 DOI: 10.1016/j.triboint.2025.110642

Yurui Shen , Chengli Yang , Tianxiang Du , Dezheng Hua , Jun Wu , Xinhua Liu

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Tribochemical mechanism of ionic liquid [P6,6,6,14][BEHP] on ferrous surfaces 离子液体[p6,6,14][BEHP]在亚铁表面的摩擦化学机理

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-03-15 DOI: 10.1016/j.triboint.2025.110643

Xiaopeng Ruan , Xiaomei Wang , Yang Zhao , Rui Zhou , Luyao Bao , Feng Zhou , Zhibin Lu

{"title":"Tribochemical mechanism of ionic liquid [P6,6,6,14][BEHP] on ferrous surfaces","authors":"Xiaopeng Ruan , Xiaomei Wang , Yang Zhao , Rui Zhou , Luyao Bao , Feng Zhou , Zhibin Lu","doi":"10.1016/j.triboint.2025.110643","DOIUrl":"10.1016/j.triboint.2025.110643","url":null,"abstract":"<div><div>The tribochemical reactions between [P<sub>6,6,6,14</sub>][BEHP] ionic liquid and ferrous surfaces are studied using reactive molecular simulations. The chemisorbed films initially develop through Fe−C, Fe−O, and Fe−P bonding, followed by decomposition of [P<sub>6,6,6,14</sub>][BEHP] generating free radicals, anions, and cations. Eventually, the cross-polymerization among [P<sub>6,6,6,14</sub>]<sup>+</sup>, [BEHP]<sup>-</sup> and their decomposition products leads to the tribofilm growth. The presence of base oil decreases the tribochemical reaction rate, it does not significantly alter the reaction pathways. And higher temperature significantly promotes tribochemical reactions rate, while the effect of normal stress is minimal and irregular. Furthermore, an electric field can direct reactive molecular species toward the substrate, thus, intensify the tribochemical reactions, and reduce the shear stress by improving the mobility of molecules. This work offers a comprehensive understanding of [P<sub>6,6,6,14</sub>][BEHP] tribofilm formation on ferrous interfaces.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"208 ","pages":"Article 110643"},"PeriodicalIF":6.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687091","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