Tribology International最新文献_第7页

Characteristics of tribofilm growth and interfacial friction of DPP and ZDDP anti-wear additives at different temperatures

IF 6.1 1区工程技术

Tribology International Pub Date : 2024-12-31 DOI: 10.1016/j.triboint.2024.110501

Yuanfei Zhang , Yan Zhao , Rui Ma , Jingxin Zhao , Weimin Li , Xinming Li , Haichao Liu

{"title":"Characteristics of tribofilm growth and interfacial friction of DPP and ZDDP anti-wear additives at different temperatures","authors":"Yuanfei Zhang , Yan Zhao , Rui Ma , Jingxin Zhao , Weimin Li , Xinming Li , Haichao Liu","doi":"10.1016/j.triboint.2024.110501","DOIUrl":"10.1016/j.triboint.2024.110501","url":null,"abstract":"<div><div>In this study, a Mini Traction Machine (MTM) equipped with the Spacer Layer Interferometry iMaging (SLIM) technique was used to in-situ monitor the formation process of protective (tribo-)films of two anti-wear additives, an ashless dibutyl dithiophosphate (DDP) and a classical zinc dibutyl dithiophosphate (ZDDP). The growing processes of DDP and ZDDP protective films on metallic rubbing surfaces across different lubrication regimes, as well as their influences on the interfacial friction, were investigated by measuring the Stribeck curves repeatedly at different temperatures. In contrast to the ZDDP additive which forms a tribofilm through tribo-chemical reactions activated by thermo-mechanical effects at rubbing interfaces, the DDP additive primarily forms physically adsorbed and thermal films under the studied operating conditions. The DDP protective films exhibit a rapid growth rate, and it is relatively temperature-insensitive, demonstrating superior anti-wear performance. Compared with the fact that ZDDP tribofilms increase the interfacial friction, the adsorption and thermal films formed by the DDP additive show pronounced friction-reduction performance in boundary and mixed lubrication regimes.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110501"},"PeriodicalIF":6.1,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158586","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

Synergistic lubrication mechanism of CeO2 nano-additives and friction modifiers in PAO/DLC solid-liquid composite lubricating system

IF 6.1 1区工程技术

Tribology International Pub Date : 2024-12-31 DOI: 10.1016/j.triboint.2024.110499

Congcong Shi , Huanhuan Zhang , Jiajia Jia , Xin Xing , Ting Li , Yujuan Zhang , Shengmao Zhang

{"title":"Synergistic lubrication mechanism of CeO2 nano-additives and friction modifiers in PAO/DLC solid-liquid composite lubricating system","authors":"Congcong Shi , Huanhuan Zhang , Jiajia Jia , Xin Xing , Ting Li , Yujuan Zhang , Shengmao Zhang","doi":"10.1016/j.triboint.2024.110499","DOIUrl":"10.1016/j.triboint.2024.110499","url":null,"abstract":"<div><div>Nano additives exhibit efficient anti-wear and friction reducing properties for various friction materials, thus having broad application prospects in engine oil. The synergistic mechanism between friction modifiers and nano additives is a key issue in the development of energy-saving engine oil. In this paper, the tribological properties of oleylamine (OM) modified CeO<sub>2</sub> nanoparticles and commercial organic friction modifiers glyceryl monooleate (GMO), glycol oleate (T403B), benzotriazole aliphatic amine (T406E) and molybdenum dithiocarbamate (MoDTC) in PAO/DLC solid-liquid composite lubricating system were investigated. It was found that only when CeO<sub>2</sub> nanoparticles were combined with GMO, the anti-wear and friction reduction performance of the system was better than that of nano additives, any friction modifiers, and their combination additives. The synergistic effect was demonstrated in the boundary lubrication range under reciprocating sliding conditions and fully lubricated range in the S-curve experiment under rotating sliding mode. Three-dimensional topography, EDS typical element distribution, and Raman analysis were performed on the worn surface, and the adsorption behavior of additives on metal and DLC surfaces was studied using quartz crystal microbalance (QCM-D). It was found that only lubricated with CeO<sub>2</sub> + GMO, a viscoelastic composite adsorption layer with both high adsorption quality and high adsorption layer density could be formed on the metal and DLC surfaces simultaneously. The adsorption layer has excellent tribological properties of high load-bearing capacity and low friction, which not only overcomes the high friction problem of CeO<sub>2</sub> nanoparticle solid tribofilm, but also avoids the high wear defect of tribofilm formed by friction modifier.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110499"},"PeriodicalIF":6.1,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158642","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

Modeling and analysis of a novel foil bearing characterized by the crossed wave strips structure

IF 6.1 1区工程技术

Tribology International Pub Date : 2024-12-31 DOI: 10.1016/j.triboint.2024.110503

Jie Li , Chaozhe Jin , Changlin Li , Jianjun Du

引用次数: 0

Enhanced wear resistance and mechanical properties of epoxy nanocomposites through surface-concentrated magnetic and luminescent graphene oxide

IF 6.1 1区工程技术

Tribology International Pub Date : 2024-12-31 DOI: 10.1016/j.triboint.2024.110504

Alexander N. Solodov , Dinar A. Balkaev , Julia R. Shayimova , Iskander R. Vakhitov , Ramilya M. Gataullina , Almaz A. Zagidullin , Dmitrii K. Zharkov , Andrey V. Leontyev , Artemii G. Shmelev , Larisa A. Nurtdinova , Victor G. Nikiforov , Liliya M. Amirova , Sergey V. Drobyshev , Alina F. Saifina , Aidar T. Gubaidullin , Yulia I. Zhuravleva , Rustem R. Amirov

{"title":"Enhanced wear resistance and mechanical properties of epoxy nanocomposites through surface-concentrated magnetic and luminescent graphene oxide","authors":"Alexander N. Solodov , Dinar A. Balkaev , Julia R. Shayimova , Iskander R. Vakhitov , Ramilya M. Gataullina , Almaz A. Zagidullin , Dmitrii K. Zharkov , Andrey V. Leontyev , Artemii G. Shmelev , Larisa A. Nurtdinova , Victor G. Nikiforov , Liliya M. Amirova , Sergey V. Drobyshev , Alina F. Saifina , Aidar T. Gubaidullin , Yulia I. Zhuravleva , Rustem R. Amirov","doi":"10.1016/j.triboint.2024.110504","DOIUrl":"10.1016/j.triboint.2024.110504","url":null,"abstract":"<div><div>In this study, a new method for producing a composite material composed of epoxy resin and 0.03 wt% modified graphene oxide (MLGO) was developed and tested, where the MLGO was concentrated near one surface of the composite using a magnetic field. This feature reduced the wear rate of that surface by 87 % compared to pure epoxy resin and by 17 % compared to the uniform distribution of MLGO in the epoxy matrix. Concentrating MLGO near the surface proved to be the most effective strategy for improving wear resistance, as it also prevented crack formation. Moreover, the MLGO nanofiller not only enhances mechanical properties and wear resistance but also imparts magnetic sensitivity and luminescence, making it a valuable component for advanced materials.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110504"},"PeriodicalIF":6.1,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158538","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

Effect of check valve on the performance of hybrid journal bearing considering starvation and cavitation

IF 6.1 1区工程技术

Tribology International Pub Date : 2024-12-31 DOI: 10.1016/j.triboint.2024.110500

Jiawei Wang , Ange Nsilani Kouediatouka , Zhaozhe Meng , Sen Jiang , Jiaxin Zheng , Jingwei Hu , Guangneng Dong

{"title":"Effect of check valve on the performance of hybrid journal bearing considering starvation and cavitation","authors":"Jiawei Wang , Ange Nsilani Kouediatouka , Zhaozhe Meng , Sen Jiang , Jiaxin Zheng , Jingwei Hu , Guangneng Dong","doi":"10.1016/j.triboint.2024.110500","DOIUrl":"10.1016/j.triboint.2024.110500","url":null,"abstract":"<div><div>The paper proposes a new numerical method to analyze the performance of hybrid journal bearing with a check valve, considering starvation and cavitation. The approach ensures the recessed unidirectional flow under the check valve effect and avoids the recessed negative pressure by introducing starvation. The flow conservation in the recess is guaranteed, and the JFO cavitation model is used to calculate the cavitation, which ensures mass conservation on the bearing land. The eccentricity ratio, attitude angle, starved region, and cavitated area of the hybrid journal bearing with a check valve are compared with that without a check valve concerning external load, rotary speed, and supply pressure. Relative pressure distribution, starved features, and cavitated characteristics are represented to explore the difference in the performance between the two bearings. The results indicate that the hybrid journal bearing with a check valve has better properties in load capacity, starvation resistance, and cavitation resistance under the recessed inlet pressure beyond the supply pressure. The reason is attributed to increased recessed pressure and decreased hydrodynamic pressure by the check valve.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110500"},"PeriodicalIF":6.1,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158594","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

Study on the current-carrying tribological properties of melamine-oleic acid hydrogen bond self-assembled conductive grease

IF 6.1 1区工程技术

Tribology International Pub Date : 2024-12-30 DOI: 10.1016/j.triboint.2024.110497

Qingyao Li , Qiang Gao , Wenhao Chen , Wenpeng Wang , Zixiang Wu , Zhuopei Zhang , Youqiang Wang , Yange Feng , Daoai Wang , Feng Zhou

引用次数: 0

Design, analysis, and implementation of a compound restrictor aerostatic bearing system

IF 6.1 1区工程技术

Tribology International Pub Date : 2024-12-30 DOI: 10.1016/j.triboint.2024.110489

Lu Zheng , Jie Li , Yazhou Sun , Wanqun Chen , Xiao Zhang

{"title":"Design, analysis, and implementation of a compound restrictor aerostatic bearing system","authors":"Lu Zheng , Jie Li , Yazhou Sun , Wanqun Chen , Xiao Zhang","doi":"10.1016/j.triboint.2024.110489","DOIUrl":"10.1016/j.triboint.2024.110489","url":null,"abstract":"<div><div>Aerostatic bearings are the key components for ultra-precision instruments. In this paper, a novel compound restrictor aerostatic bearing that combines orifice, radial groove, and circumferential groove restrictors was proposed and prototyped. This innovative combination addresses the inherent limitations of conventional orifice restrictor bearings, such as vortex-induced micro-vibrations and reduced stability, by significantly enhancing both load capacity and stiffness. Analytical and CFD models are developed based on classical lubrication theory and laminar flow conditions. The designed bearing is studied through numerical and computational fluid dynamics (CFD) methods. Experiments on bearing load capacity and stiffness have been conducted to evaluate the performance. The results indicate that the load capacity and stiffness of the compound restrictor aerostatic bearing are enhanced by more than 51 % and 55 %, respectively, compared to those of the bearing with an orifice restrictor of the same dimensional parameters. This demonstrates the feasibility and effectiveness of the proposed compound restrictor aerostatic bearing, offering improved stability and reduced micro-vibrations compared to conventional designs.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110489"},"PeriodicalIF":6.1,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159153","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

High temperature tribological behaviors of GH3535 alloy as structural materials for molten salt reactor applications

IF 6.1 1区工程技术

Tribology International Pub Date : 2024-12-29 DOI: 10.1016/j.triboint.2024.110493

Peiying Shi , Huwei Sun , Xiang-Xi Ye , Shubin Wang , Bin Leng , Zhenbo Zhu , Hefei Huang

引用次数: 0

Study on the mass imbalance macro-micro friction and wear characteristics of high-speed angular contact ball bearing cages

IF 6.1 1区工程技术

Tribology International Pub Date : 2024-12-28 DOI: 10.1016/j.triboint.2024.110491

Guang Zeng , Zhaowei Liang , Chunjiang Zhao , Yuanpeng Liu , Kaixuan Li , Qiang Bian , Menghao Bao

{"title":"Study on the mass imbalance macro-micro friction and wear characteristics of high-speed angular contact ball bearing cages","authors":"Guang Zeng , Zhaowei Liang , Chunjiang Zhao , Yuanpeng Liu , Kaixuan Li , Qiang Bian , Menghao Bao","doi":"10.1016/j.triboint.2024.110491","DOIUrl":"10.1016/j.triboint.2024.110491","url":null,"abstract":"<div><div>Cage mass imbalance stability is crucial for the reliability and service life of high-speed angular contact ball bearings. This paper carries out experimental research on the bearing cage mass imbalance working condition, with the objective of elucidating the wear characteristics and mechanisms of high-speed angular contact ball bearings under the condition of cage mass imbalance, so as to provide a theoretical basis for the reliability design of related equipment. Analyses were carried out on the wear forms, wear mechanisms, macroscopic and microscopic morphological features, material transfer, and micro-textures of the wear characteristics of bearing components affected by this condition. The research shows that: the cage, rolling body and raceway have different degrees of wear; among them, the friction burns and plastic deformation of the cage are the most serious, and the plastic deformation is mainly coordinated by the slipping of the copper phase grains, and the frequent impact load forces the copper phase grains to accumulate more dislocations and also provides the power needed for twinning; simultaneously, the cage and rolling body wear Surface material transfer and oxidized wear, seriously affecting the service life of bearings. The results of this research can provide references for the bearing design and maintenance of bearings in aerospace applications, high-speed machine tools and other high-precision equipment, thereby improve the operational stability of equipment in high-end fields such as aerospace and high-speed CNC lathes.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110491"},"PeriodicalIF":6.1,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159767","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

Synergistic effects of polytetrafluoroethylene fibers and graphite microplates on the tribological performance of polyetherketone composites for seawater lubrication

IF 6.1 1区工程技术

Tribology International Pub Date : 2024-12-28 DOI: 10.1016/j.triboint.2024.110492

Tingqiang Yang , Hao Liu , Liang Liu , Yunfeng Yan , Junshuai Li , Jianzhang Wang

引用次数: 0