Lubrication Science最新文献_第3页

Effect of LaF3 on the Properties of Pb-Free Cu-Based Self-Lubricating Composites LaF3对无铅cu基自润滑复合材料性能的影响

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-12-04 DOI: 10.1002/ls.1734

Cong Liu, Yanguo Yin, Rongrong Li, Haoping Wang, Liang Li

{"title":"Effect of LaF3 on the Properties of Pb-Free Cu-Based Self-Lubricating Composites","authors":"Cong Liu, Yanguo Yin, Rongrong Li, Haoping Wang, Liang Li","doi":"10.1002/ls.1734","DOIUrl":"https://doi.org/10.1002/ls.1734","url":null,"abstract":"<div>\u0000 \u0000 <p>A strategy involving the use the rare-earth compound LaF<sub>3</sub> with good lubrication and stability properties as a filler in the preparation of Cu-based composites was proposed to solve the problem of poor wear resistance in Pb-free Cu-Bi materials. The influence and regulatory mechanism of LaF<sub>3</sub> content on the mechanical and tribological properties of these composites were studied. The results indicate that LaF<sub>3</sub> has a good refining effect on Cu alloy grains, and LaF<sub>3</sub> and Bi are distributed in a network along the grain boundaries of the Cu alloy in the material. As the LaF<sub>3</sub> content increases, the mechanical properties and friction coefficient of the composite gradually decrease, and the wear rate first declines and then increases. The wear resistance of Cu-Bi composite containing LaF<sub>3</sub> mainly depends on the mechanical support provided by the matrix. When the LaF<sub>3</sub> content is higher than 6%, the composite strength is extremely low, and the increase in lubricant content at the friction interface does not play a decisive role in the material wear behaviour. The material wear rate increases with the increase in LaF<sub>3</sub> content. Therefore, using 6% LaF<sub>3</sub> is recommended to improve the wear resistance of the material and maintain a balance among its mechanical properties, antifriction and wear resistance.</p>\u0000 </div>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"37 3","pages":"198-207"},"PeriodicalIF":1.8,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Preparation of Diisooctyl Phosphate-Modified Ultra-Small Zinc Oxide Nanoparticle and Investigation of Its Tribological Properties as Additive in Alkylnaphthalene 磷酸二异辛基改性超微氧化锌纳米颗粒的制备及其作为烷基萘添加剂的摩擦学性能研究

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-11-10 DOI: 10.1002/ls.1731

Zhenghao Li, Shuguang Fan, Ningning Song, Guangbin Yang, Chunli Zhang, Laigui Yu, Yujuan Zhang, Shengmao Zhang

{"title":"Preparation of Diisooctyl Phosphate-Modified Ultra-Small Zinc Oxide Nanoparticle and Investigation of Its Tribological Properties as Additive in Alkylnaphthalene","authors":"Zhenghao Li, Shuguang Fan, Ningning Song, Guangbin Yang, Chunli Zhang, Laigui Yu, Yujuan Zhang, Shengmao Zhang","doi":"10.1002/ls.1731","DOIUrl":"https://doi.org/10.1002/ls.1731","url":null,"abstract":"<div>\u0000 \u0000 <p>ZnO nanoparticle surface-modified by diisooctyl phosphate (P204) was prepared by liquid-phase in situ surface modification technique with zinc acetate as the raw material, P204 as the modifier and anhydrous ethanol as the solvent. The morphology and microstructure of the P204-ZnO nanoparticle were characterised by transmission electron microscopy, X-ray diffraction and Fourier transform infrared spectrometry. Its thermal stability was evaluated by thermogravimetric analysis; and its tribological properties as the additive in alkylnaphthalene were evaluated with an SRV-5 friction and wear tester in reciprocal sliding mode. The results show that the as-prepared P204-ZnO nanoparticle has an average particle size of about 4 nm and a P204 content of about 42% (mass fraction); and the surface modifier is grafted onto the surface of ZnO nanoparticle by physical adsorption. With a mass fraction of 0.5% in alkylnaphthalene base oil, P204-ZnO nano-additive can mildly reduce the friction coefficient and drastically reduce the wear rate of the steel–steel sliding pair. This is due to the formation of the composite tribofilm via the adsorption and deposition of the nano-additive on rubbed steel surfaces as well as the tribochemical reactions of the modifier P204 yielding phosphate and of steel substrate yielding iron oxides. The as-formed composite tribofilm with a thickness of about 20 nm, consisting of phosphate and iron oxides as the binder as well as deposited ZnO nanoparticle as the filling phase, is responsible for the excellent friction-reducing and antiwear abilities of P204-ZnO nano-additive for the steel sliding contact.</p>\u0000 </div>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"37 3","pages":"189-197"},"PeriodicalIF":1.8,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

The Role of Functionalized CuO Additive in Enhancing Tribological Performance of Plastic Oil Lubricant 官能化氧化铜添加剂在提高塑料润滑油摩擦学性能中的作用

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-11-07 DOI: 10.1002/ls.1732

Soumya Sikdar, Pradeep L. Menezes

{"title":"The Role of Functionalized CuO Additive in Enhancing Tribological Performance of Plastic Oil Lubricant","authors":"Soumya Sikdar, Pradeep L. Menezes","doi":"10.1002/ls.1732","DOIUrl":"https://doi.org/10.1002/ls.1732","url":null,"abstract":"<div>\u0000 \u0000 <p>The study investigated the potential of waste plastic oil (PO) as an alternative to petroleum-based lubricants, specifically mineral oil. The rheological properties, dispersion stability, friction, and wear performance of PO were examined and compared with mineral oil. Results showed that PO demonstrated similar lubrication performance to mineral oil. To enhance the lubrication performance of PO, the study incorporated various concentrations of nano CuO solid lubricant additives, resulting in the formation of CuO nano lubricants. These lubricants showed an improvement in friction and wear by 20% and 44% compared with PO. Furthermore, the CuO solid lubricant additives were functionalized and incorporated in the same concentrations into PO, resulting in the formation of functionalized nano lubricants, which further lowered the friction and wear by 28% and 91% compared with PO. The novelty of the paper is that a simple chemical functionalization process that not only helped in improving its dispersion stability of additives in the PO, but also enhanced the wear performance. The mechanisms behind the enhancement of friction and wear performance were discussed. Based on these findings, it can be concluded that incorporating functionalized nano additives in PO improve friction and wear performance in mechanical components, promoting wider utilisation of PO.</p>\u0000 </div>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"37 2","pages":"170-188"},"PeriodicalIF":1.8,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Lubrication Prediction of Sphere-Gradient Coated Half Space Interfaces 球梯度涂覆半空间界面的润滑预测

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-11-05 DOI: 10.1002/ls.1728

Xiaoya Gong, Tao He

引用次数: 0

Study on the Performance of Different Crystal Forms Nano MoS2 as Lubricant Additives in Reducing Wear and Friction 不同晶型纳米二硫化钼作为润滑油添加剂的减磨减摩性能研究

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-11-05 DOI: 10.1002/ls.1727

Runling Peng, Wei Wang, Hang Du, Jinyue Liu, Zhan Gao, Junde Guo, Wei Cao

{"title":"Study on the Performance of Different Crystal Forms Nano MoS2 as Lubricant Additives in Reducing Wear and Friction","authors":"Runling Peng, Wei Wang, Hang Du, Jinyue Liu, Zhan Gao, Junde Guo, Wei Cao","doi":"10.1002/ls.1727","DOIUrl":"https://doi.org/10.1002/ls.1727","url":null,"abstract":"<div>\u0000 \u0000 <p>In order to investigate the anti-friction and anti-wear performance of different crystal forms nano MoS<sub>2</sub> in paraffin oil. Freeze-drying method combined with hydrothermal was used to prepare different crystal forms nano MoS<sub>2</sub> and their microstructures were characterised by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The anti-friction and anti-wear performance of MoS<sub>2</sub> nanoparticles as lubricat additives under different working conditions was investigated by the ball-and-disk friction and wear testing machine and the mechanism of friction and wear reduction was investigated. The results showed that the thickness of the floral sheet MoS<sub>2</sub> flakes was about 10 nm and the particle size of the spherical MoS<sub>2</sub> was about 90 nm. When the addition concentration was 3 wt%, the friction coefficient of the floral sheet MoS<sub>2</sub> in paraffin oil was lower at 0.094, which was 29.3% lower than that of the pure paraffin oil, the width of the abrasion marks was 24.2% lower than that of the pure paraffin oil and the wear rate was 71.6% lower than that of the pure paraffin oil; The friction coefficient of the spherical MoS<sub>2</sub> with 2.5 wt% addition was 0.082, which was 38.3% lower than the friction coefficient of pure paraffin oil, 24.1% lower than that of paraffin oil in terms of wear scar width and 81.9% lower than that of paraffin oil in terms of wear rate.</p>\u0000 </div>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"37 2","pages":"158-169"},"PeriodicalIF":1.8,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Numerical Thermal Analysis of Greased Rolling Bearing Considering Surface Topography and Plastic Deformation 考虑表面形貌和塑性变形的加脂滚动轴承数值热分析

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-11-05 DOI: 10.1002/ls.1730

Jiaqi Li, Linxue An, Yuping Huang, Zhenshun Li, Ben An, Ben Guan, Rui Li

引用次数: 0

Experimental Study on Enhancement in the Tribological Behaviour of Military Grade Lubricant Using Titanium Dioxide Nanoadditives for Aerospace Applications 应用二氧化钛纳米添加剂增强军用级润滑油摩擦学性能的实验研究

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-10-28 DOI: 10.1002/ls.1729

M. Senthil Kumar, A. Elayaperumal, Sankaraiah Mada, H. Sathyanarayana

{"title":"Experimental Study on Enhancement in the Tribological Behaviour of Military Grade Lubricant Using Titanium Dioxide Nanoadditives for Aerospace Applications","authors":"M. Senthil Kumar, A. Elayaperumal, Sankaraiah Mada, H. Sathyanarayana","doi":"10.1002/ls.1729","DOIUrl":"https://doi.org/10.1002/ls.1729","url":null,"abstract":"<div>\u0000 \u0000 <p>The coefficient of friction of low carbon chromium alloy steel with military grade lubricant was high, resulting in increased heat generation and temperature rise of the lubricant in the aircraft power transmission units such as engine gearbox, accessory gearbox and so on. To address this, the current research proposes the addition of TiO<sub>2</sub> nanoparticles to MIL grade lubricant as an additive to enhance the tribological performance. In this experimental study, TiO<sub>2</sub> nanolubricant was prepared using various surfactants for better suspension of TiO<sub>2</sub> nanoparticles, and properties were evaluated for both base lubricant and nanolubricant. The tribological experiments were conducted using a four ball tester, a shear stability tester and a reichert tester. In a four ball test, TiO<sub>2</sub> nanolubricant resulted in a 27.3% reduction in wear scar diameter by the addition of TiO<sub>2</sub> nanoparticles to the base lubricant. In a shear stability test, TiO<sub>2</sub> nanolubricant showed 80% better shear stability than the base lubricant. In the reichert test, the coefficient of friction was reduced by 13% with the TiO<sub>2</sub> nanolubricant. The experimental findings demonstrated that the TiO<sub>2</sub> nanoparticles, as an additive to a military grade lubricant, have superior tribological properties for aerospace applications.</p>\u0000 </div>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"37 2","pages":"117-128"},"PeriodicalIF":1.8,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

A Simplified Non-Hertzian Wheel-Rail Adhesion Model Under Interfacial Contaminations Considering Surface Roughness 考虑表面粗糙度的接触面污染下的简化非赫兹轮轨黏附模型

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-10-27 DOI: 10.1002/ls.1726

Zhaoyang Wang, Bing Wu, Jiaqing Huang

{"title":"A Simplified Non-Hertzian Wheel-Rail Adhesion Model Under Interfacial Contaminations Considering Surface Roughness","authors":"Zhaoyang Wang, Bing Wu, Jiaqing Huang","doi":"10.1002/ls.1726","DOIUrl":"https://doi.org/10.1002/ls.1726","url":null,"abstract":"<div>\u0000 \u0000 <p>The accuracy and efficiency of the wheel-rail adhesion model are important to the wheel-rail rolling contact issues. The purpose of this study is to develop a simplified non-Hertzian wheel-rail adhesion model under interfacial contaminations to predict the wheel-rail adhesion coefficient. Firstly, a non-Hertzian full elasto-hydrodynamic lubrication (EHL) model was developed and applied to determine the wheel-rail contact pressure and film thickness under interfacial contaminations. Then, the empirical formula of central film thickness available to non-Hertzian wheel-rail normal contact relating to train speeds, axle loads and material parameters were proposed based on a large number of non-Hertzian full EHL simulation for smooth surface under interfacial contaminations using linear regression. The empirical non-Hertzian central film thickness formula and minimum film thickness formula for wheel-rail contact obtained in this paper show certain differences from the formulas based on Hertzian contact. Using the proposed non-Hertzian central film thickness formula, a simplified non-Hertzian wheel-rail contact adhesion model was developed, and the adhesion coefficient was obtained at different speeds and compared with the field test data. The numerical results showed good agreement with field test data.</p>\u0000 </div>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"37 1","pages":"105-116"},"PeriodicalIF":1.8,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Enhancing Lubrication Performance of Ga–In–Sn Liquid Metal via Electrochemical Boronising Treatment 通过电化学硼化处理提高镓铟硒液态金属的润滑性能

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-10-11 DOI: 10.1002/ls.1724

Pengfei Li, Hongxing Wu, Jianxin Dong, Shaochong Yin, Ningbo Feng, Ke Hua, Haifeng Wang

{"title":"Enhancing Lubrication Performance of Ga–In–Sn Liquid Metal via Electrochemical Boronising Treatment","authors":"Pengfei Li, Hongxing Wu, Jianxin Dong, Shaochong Yin, Ningbo Feng, Ke Hua, Haifeng Wang","doi":"10.1002/ls.1724","DOIUrl":"https://doi.org/10.1002/ls.1724","url":null,"abstract":"<div>\u0000 \u0000 <p>As one of the liquid metals, Ga–In–Sn liquid metals can function as an advanced lubricant with high conductivity in a tribology system. It has already revealed advancements in several applications, such as coolants and electromechanical relays. However, Ga–In–Sn liquid metal shows poor lubrication performance on industrial metallic materials, which limits its application in engineering. In this study, the electrochemical boronising strategy was applied to improve the lubrication effect of Ga–In–Sn liquid metal on steel friction pairs. Electrochemical boronising treatment was performed to the base material AISI 52100, and a boronised layer with a thickness of around 64 μm was generated. Tribology tests were carried out on both boronised and original samples with the lubrication of Ga–In–Sn liquid metal (68.5 wt% Ga, 21.5 wt% In and 10 wt% Sn). Results show that the wear resistance of the tribo-system reveals great improvement: The coefficient of friction decreases by 59% and the wear rate drops 85% compared to the steel/steel friction pair. EDS and XPS results show that a tribofilm consisted of Fe/Ga was in situ–generated on the wear scar of the boronised sample, which results in the synergy effect between the boronised layer and the Ga–In–Sn liquid metal. Therefore, we provided a robust strategy to enhance the lubrication performance of Ga–In–Sn liquid metal on a steel friction pair by using electrochemical boronising treatment, which could broaden the application field of Ga–In–Sn liquid metals.</p>\u0000 </div>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"37 1","pages":"93-104"},"PeriodicalIF":1.8,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Evaluation of Scuffing Load Capacity of Helical Gear Based on the Tribo-Dynamic Model 基于摩擦动力学模型的斜齿轮磨损承载能力评估

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-09-23 DOI: 10.1002/ls.1723

Mingyong Liu, Shuchang Chen, Jun Hu, Guogeng Zhang, Lin Zhu, Xue Xiang, Chunai Yan

{"title":"Evaluation of Scuffing Load Capacity of Helical Gear Based on the Tribo-Dynamic Model","authors":"Mingyong Liu, Shuchang Chen, Jun Hu, Guogeng Zhang, Lin Zhu, Xue Xiang, Chunai Yan","doi":"10.1002/ls.1723","DOIUrl":"https://doi.org/10.1002/ls.1723","url":null,"abstract":"<div>\u0000 \u0000 <p>The scuffing load capacity of gear is closely related to the meshing temperature rise of tooth surface. The key to predict the temperature rise is to establish an accurate meshing temperature rise model. In the paper, a tribo-dynamic model of helical gear is established through coupling of tooth surface lubrication parameters, and the influence of temperature rise on ambient temperature during meshing process is considered. Then, the effects of oil supply temperature, input speed and torque on tooth surface temperature rise, film thickness, friction excitation and gear dynamic characteristics are discussed. The results show that the temperature rise of the gear is higher during the engaging-in and engaging-out regions. Meanwhile, there is local high temperature at the end of the contact line due to the end effect. The vibration of gear along the off-line-of-action direction is mainly determined by friction excitation. With the increase of oil supply temperature, input speed and torque, the risk of scuffing failure increases and the influence of oil supply temperature and input load is more significant. The conclusions of this paper may provide some valuable suggestions for the anti-gluing failure design of gear in engineering.</p>\u0000 </div>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"37 1","pages":"78-92"},"PeriodicalIF":1.8,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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