Tribology International最新文献_第3页

Tribological properties and molecular dynamics analysis of citric acid modified 3D porous graphene/carbon black as lubricant additives

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}

引用次数: 0

Self-lubricating film formation and ultra-low wear of PTFE/aluminum through anodization induced nano-microtextures

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

引用次数: 0

Study on the material removal mechanism of cemented carbide magnetic materials in magnetic field-assisted mass polishing

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}

引用次数: 0

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

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}

引用次数: 0

Achieving oil-based superlubricity with near-zero wear via synergistic effect between PEEK-PTFE and PAO40 containing DDP-Cu nanoparticles

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}

引用次数: 0

Discussion of “Prediction of pavement friction coefficient based on dynamic friction test simulation”

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

引用次数: 0

Review of tribological considerations in solid oxide fuel cells

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

引用次数: 0

Data-driven analysis of magnetorheological fluid seal degradation for performance prediction

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

引用次数: 0

Tribochemical mechanism of ionic liquid [P6,6,6,14][BEHP] on ferrous surfaces

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

Multi-scale simulations of plasticity in metal nanocontacts: Irreversibility of the deformation

IF 6.1 1区工程技术

Tribology International Pub Date : 2025-03-14 DOI: 10.1016/j.triboint.2025.110632

A.C. Dadduzio, L. Nicola

{"title":"Multi-scale simulations of plasticity in metal nanocontacts: Irreversibility of the deformation","authors":"A.C. Dadduzio, L. Nicola","doi":"10.1016/j.triboint.2025.110632","DOIUrl":"10.1016/j.triboint.2025.110632","url":null,"abstract":"<div><div>A dual-scale scheme, comprising an atomistic and a continuum domain, is here developed to study contact deformation. The three-dimensional model allows to tackle with atomistic precision problems where contact occurs at the nano-scale, while the bodies have larger dimensions. The upper part of the body is modeled by means of an atomistic domain to capture non-linearities arising in the surrounding of the contact region, including defects formation and dislocation motion. The lower part of the body, away from the contact, is instead modeled as a continuum. The novelty of the dual-scale method lies in the way the solution to the continuum is obtained: analytically through a Green’s function methodology, thus very time efficient. The model is first validated through direct comparison with full atomistic simulations and then applied to study light indentation and subsequent unloading of metal crystal by means of a spherical tip. The simulations intend to shed more light on the ‘reversed plastic behavior’ recently observed in nanocontacts. This is done by computing the irreversible plastic strain after unloading. Results show that if there is a significant deviation from the elastic curve upon loading, which manifests itself with a few drops in the force, there is also irreversible strain upon unloading. Only the nucleation of stacking faults that give negligible deviation from the load area curve is reversible. Classical theories like Hertz or JKR can be safely used when this initial stacking faults appear, but should be avoided when actual plasticity kicks in.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"208 ","pages":"Article 110632"},"PeriodicalIF":6.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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