Lubrication Science最新文献

The Role of Functionalized CuO Additive in Enhancing Tribological Performance of Plastic Oil Lubricant

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

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

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

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

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

Investigating the Effects of Oil Additives on the Tribological Performance of Hydrodynamic Journal Bearings: A Study With Hazelnut Oil in Boundary and Mixed Lubrication Regimes 研究油添加剂对流体动压滑动轴承摩擦学性能的影响：以榛子油为边界润滑和混合润滑的研究

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-09-19 DOI: 10.1002/ls.1725

Hasan Baş, Yunus Emre Karabacak

引用次数: 0

Properties of Bi2S3 Coatings Deposited on the Bionic Leaf Vein Textured Surfaces With Different Surface Densities 沉积在不同表面密度的仿生叶脉纹理表面上的 Bi2S3 涂层的特性

IF 1.8 4区工程技术

Lubrication Science Pub Date : 2024-09-12 DOI: 10.1002/ls.1722

Junyan Wang, Jianxin Deng, Yichen Bao, Kexin Ma, Mingyuan Wang, Runzhou Tian

{"title":"Properties of Bi2S3 Coatings Deposited on the Bionic Leaf Vein Textured Surfaces With Different Surface Densities","authors":"Junyan Wang, Jianxin Deng, Yichen Bao, Kexin Ma, Mingyuan Wang, Runzhou Tian","doi":"10.1002/ls.1722","DOIUrl":"10.1002/ls.1722","url":null,"abstract":"<div>\u0000 \u0000 <p>In order to investigate the impact of micro-textured surfaces with varying surface density on coating properties, the bionic leaf vein micro-texture with different surface densities were prepared on the substrate surface by laser processing. Bi<sub>2</sub>S<sub>3</sub> soft coatings were deposited on the textured surfaces by electrohydrodynamic atomization. The influence of textured surface density on the adhesion and tribological properties of the coatings was analysed and discussed by scratch tests and friction wear tests. The results showed a significant increase in the friction coefficient as the surface density increased. However, after reaching a certain point, the friction coefficient tended to decrease. The coatings deposited on the lower surface density (13.9%, 14.5%) have better tribological performance compared with the higher surface density (35.6%, 36.2%). Meanwhile, the adhesion of coatings on the textured substrate enhanced compared with coatings deposited on the polished substrate. A reasonable textured surface density can effectively improve the adhesion and tribological properties of the coating.</p>\u0000 </div>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"37 1","pages":"45-60"},"PeriodicalIF":1.8,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142263009","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