Pub Date : 2024-12-30DOI: 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
Currently, the conductive grease has problems such as unstable conductivity and large wear volume. This article used an in-situ synthesis method to synthesize a base conductive grease with PAO 10 as base oil, oleic acid and melamine as thickener. The complex conductive grease was further prepared by doping MWCNTs-OH into the base conductive grease. The experiment found that the complex conductive grease's anti-wear and anti-friction properties improved by 72.23 % and 27.16 %, respectively, with respect to the current-carrying condition. The contact resistance is 27.12 % lower than commercially available conductive grease. This method of reducing the contact resistance (ECR) and friction coefficient (COF) of conductive grease through hydrogen bonding shows excellent application prospects in the current-carrying friction direction.
{"title":"Study on the current-carrying tribological properties of melamine-oleic acid hydrogen bond self-assembled conductive grease","authors":"Qingyao Li , Qiang Gao , Wenhao Chen , Wenpeng Wang , Zixiang Wu , Zhuopei Zhang , Youqiang Wang , Yange Feng , Daoai Wang , Feng Zhou","doi":"10.1016/j.triboint.2024.110497","DOIUrl":"10.1016/j.triboint.2024.110497","url":null,"abstract":"<div><div>Currently, the conductive grease has problems such as unstable conductivity and large wear volume. This article used an in-situ synthesis method to synthesize a base conductive grease with PAO 10 as base oil, oleic acid and melamine as thickener. The complex conductive grease was further prepared by doping MWCNTs-OH into the base conductive grease. The experiment found that the complex conductive grease's anti-wear and anti-friction properties improved by 72.23 % and 27.16 %, respectively, with respect to the current-carrying condition. The contact resistance is 27.12 % lower than commercially available conductive grease. This method of reducing the contact resistance (ECR) and friction coefficient (COF) of conductive grease through hydrogen bonding shows excellent application prospects in the current-carrying friction direction.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110497"},"PeriodicalIF":6.1,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158585","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}
Pub Date : 2024-12-30DOI: 10.1016/j.triboint.2024.110489
Lu Zheng , Jie Li , Yazhou Sun , Wanqun Chen , Xiao Zhang
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.
{"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}
Pub Date : 2024-12-29DOI: 10.1016/j.triboint.2024.110493
Peiying Shi , Huwei Sun , Xiang-Xi Ye , Shubin Wang , Bin Leng , Zhenbo Zhu , Hefei Huang
The temperature- and time-dependent tribological behaviors of GH3535 alloy were systematically investigated. The results indicate that the terrible wear occurs at room temperature. The friction coefficient and wear rate decrease monotonically with increasing temperature from room temperature to 800 °C. The enhancing tribological performance at 700 °C and 800 °C is attributed to the generation of the lubricating oxides on the mating face of both GH3535 alloys and counterpart balls. To reveal the underlying mechanisms, time-dependent wear tests were conducted at 700 °C. The near-interface region of GH3535 alloy after a 120 min wear test at 700 °C exhibits a gradient layered structure. These findings are critical for understanding the high-temperature tribological behavior of GH3535 alloy, enhancing its performance as a structural material in molten salt reactors (MSRs) environments.
{"title":"High temperature tribological behaviors of GH3535 alloy as structural materials for molten salt reactor applications","authors":"Peiying Shi , Huwei Sun , Xiang-Xi Ye , Shubin Wang , Bin Leng , Zhenbo Zhu , Hefei Huang","doi":"10.1016/j.triboint.2024.110493","DOIUrl":"10.1016/j.triboint.2024.110493","url":null,"abstract":"<div><div>The temperature- and time-dependent tribological behaviors of GH3535 alloy were systematically investigated. The results indicate that the terrible wear occurs at room temperature. The friction coefficient and wear rate decrease monotonically with increasing temperature from room temperature to 800 °C. The enhancing tribological performance at 700 °C and 800 °C is attributed to the generation of the lubricating oxides on the mating face of both GH3535 alloys and counterpart balls. To reveal the underlying mechanisms, time-dependent wear tests were conducted at 700 °C. The near-interface region of GH3535 alloy after a 120 min wear test at 700 °C exhibits a gradient layered structure. These findings are critical for understanding the high-temperature tribological behavior of GH3535 alloy, enhancing its performance as a structural material in molten salt reactors (MSRs) environments.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110493"},"PeriodicalIF":6.1,"publicationDate":"2024-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158537","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}
Pub Date : 2024-12-28DOI: 10.1016/j.triboint.2024.110491
Guang Zeng , Zhaowei Liang , Chunjiang Zhao , Yuanpeng Liu , Kaixuan Li , Qiang Bian , Menghao Bao
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.
{"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}
Pub Date : 2024-12-28DOI: 10.1016/j.triboint.2024.110492
Tingqiang Yang , Hao Liu , Liang Liu , Yunfeng Yan , Junshuai Li , Jianzhang Wang
Polyetherketone (PEK) is a high-performance polymer, but its composites for lubrication applications have not been well explored because of limited enhancement by one-component modification. In this study, ternary PEK composites reinforced with 5 % polytetrafluoroethylene (PTFE) fibers and different amounts of graphite (Gr) were developed. The results showed that uniform dispersion was achieved via solution blending, both PTFE and Gr exhibited good compatibility with PEK. The hardness, modulus, thermal properties of PEK composites were enhanced, together with optimal seawater wettability and absorption. Compared with PEK matrix, the friction coefficient and wear rate were reduced by 55 % and 3 orders of magnitude, respectively, at 20 % Gr loading owing to the synergetic effect between PTFE with a unique fiber topology and Gr microplates.
{"title":"Synergistic effects of polytetrafluoroethylene fibers and graphite microplates on the tribological performance of polyetherketone composites for seawater lubrication","authors":"Tingqiang Yang , Hao Liu , Liang Liu , Yunfeng Yan , Junshuai Li , Jianzhang Wang","doi":"10.1016/j.triboint.2024.110492","DOIUrl":"10.1016/j.triboint.2024.110492","url":null,"abstract":"<div><div>Polyetherketone (PEK) is a high-performance polymer, but its composites for lubrication applications have not been well explored because of limited enhancement by one-component modification. In this study, ternary PEK composites reinforced with 5 % polytetrafluoroethylene (PTFE) fibers and different amounts of graphite (Gr) were developed. The results showed that uniform dispersion was achieved via solution blending, both PTFE and Gr exhibited good compatibility with PEK. The hardness, modulus, thermal properties of PEK composites were enhanced, together with optimal seawater wettability and absorption. Compared with PEK matrix, the friction coefficient and wear rate were reduced by 55 % and 3 orders of magnitude, respectively, at 20 % Gr loading owing to the synergetic effect between PTFE with a unique fiber topology and Gr microplates.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110492"},"PeriodicalIF":6.1,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159766","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}
Pub Date : 2024-12-27DOI: 10.1016/j.triboint.2024.110488
Qianqian Cheng , Jie Jin , Chunjiang Liu , Yulei Yang
Rolled titanium alloys exhibit significant internal strain, adversely affecting mechanical performance. This study examines how internal strain influences the frictional behavior of Ti6Al4V across a broad temperature range. To alleviate strain, Hot Isostatic Pressing (HIP) was applied. HIP transformed the microstructure by restoring substructures and promoting recrystallization, reducing hardness by ∼ 10 %. However, reduced strain suppressed crack initiation and propagation, preventing the formation of large-sized wear debris. Post-HIP, smaller wear debris with high surface energy promoted a high-temperature oxidation layer, enhancing wear resistance at elevated temperatures. These findings provide insights into the role of internal strain in titanium alloy tribology and demonstrate HIP's effectiveness in improving high-temperature wear resistance.
{"title":"Study on the influence mechanism of internal strain on wide-temperature range tribological behavior of Ti6Al4V alloy","authors":"Qianqian Cheng , Jie Jin , Chunjiang Liu , Yulei Yang","doi":"10.1016/j.triboint.2024.110488","DOIUrl":"10.1016/j.triboint.2024.110488","url":null,"abstract":"<div><div>Rolled titanium alloys exhibit significant internal strain, adversely affecting mechanical performance. This study examines how internal strain influences the frictional behavior of Ti<sub>6</sub>Al<sub>4</sub>V across a broad temperature range. To alleviate strain, Hot Isostatic Pressing (HIP) was applied. HIP transformed the microstructure by restoring substructures and promoting recrystallization, reducing hardness by ∼ 10 %. However, reduced strain suppressed crack initiation and propagation, preventing the formation of large-sized wear debris. Post-HIP, smaller wear debris with high surface energy promoted a high-temperature oxidation layer, enhancing wear resistance at elevated temperatures. These findings provide insights into the role of internal strain in titanium alloy tribology and demonstrate HIP's effectiveness in improving high-temperature wear resistance.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110488"},"PeriodicalIF":6.1,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158536","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}
Pub Date : 2024-12-27DOI: 10.1016/j.triboint.2024.110490
Yulei Yang , Bin Liu , Bihua Lin , Jie Jin , Haiyue Ren , Yuji Chen , Minghui Pan , Yi Liang
Improving the tribological properties of bearing steels in starved lubrication is of practical significance. In this study, niobium and nitrogen (Nb+N) implantation were utilized to enhance the performance of 8Cr4Mo4V steel. Sliding wear test, contact angle measurement, nanoindentation, X-ray photoelectron spectroscopy, and transmission electron microscope examination were conducted. Nb+N implantation results in friction reduction and a remarkable (84.5 %) decrease in wear rate. Experimental analysis reveals that Nb+N implantation enhances surface hardness and improves oil retention capacity which benefits wear resistance. Moreover, the tribolayers for implanted 8Cr4Mo4V demonstrate nanocrystalline structure with fewer defects, further contributing to the wear resistance. The findings provide new insights into the tribological mechanisms and highlight the potential of ion implantation in starved lubrication scenarios in aerospace.
{"title":"Influencing mechanisms of niobium and nitrogen implantation on tribological properties of 8Cr4Mo4V steel under starved lubrication","authors":"Yulei Yang , Bin Liu , Bihua Lin , Jie Jin , Haiyue Ren , Yuji Chen , Minghui Pan , Yi Liang","doi":"10.1016/j.triboint.2024.110490","DOIUrl":"10.1016/j.triboint.2024.110490","url":null,"abstract":"<div><div>Improving the tribological properties of bearing steels in starved lubrication is of practical significance. In this study, niobium and nitrogen (Nb+N) implantation were utilized to enhance the performance of 8Cr4Mo4V steel. Sliding wear test, contact angle measurement, nanoindentation, X-ray photoelectron spectroscopy, and transmission electron microscope examination were conducted. Nb+N implantation results in friction reduction and a remarkable (84.5 %) decrease in wear rate. Experimental analysis reveals that Nb+N implantation enhances surface hardness and improves oil retention capacity which benefits wear resistance. Moreover, the tribolayers for implanted 8Cr4Mo4V demonstrate nanocrystalline structure with fewer defects, further contributing to the wear resistance. The findings provide new insights into the tribological mechanisms and highlight the potential of ion implantation in starved lubrication scenarios in aerospace.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110490"},"PeriodicalIF":6.1,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158593","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}
Pub Date : 2024-12-26DOI: 10.1016/j.triboint.2024.110486
Foxian Fan , Sagar Jalui , Kazi Shahed , Brigid Mullany , Guha Manogharan
Although additive manufacturing has been explored for diverse applications, poor surface finishes are common to as-built AM parts. Particulary in metal AM, often post-processing is required to improve surface quality. Centrifugal disc finishing (CDF) is an efficient mass finishing technique that is widely used in traditional manufacturing methods. As-built AM surfaces have unique surface topology based on build orientation that respond differently to mass finishing conditions. This work investigates the effects of AM processing and CDF parameters on evolution of surface topology based on process conditions . Prediction accuracy of 90% was achieved in surface evolution using feature-instance segmentation and machine learning method implemented in this study. The study provides a new insight into achieving desired surface finish in metal AM for complex geometries via mass finishing such as centrifugal disk finishing.
{"title":"Mass finishing for additive manufacturing: Tribological analysis, surface topology, image processing, predictive model, and processing recommendations","authors":"Foxian Fan , Sagar Jalui , Kazi Shahed , Brigid Mullany , Guha Manogharan","doi":"10.1016/j.triboint.2024.110486","DOIUrl":"10.1016/j.triboint.2024.110486","url":null,"abstract":"<div><div>Although additive manufacturing has been explored for diverse applications, poor surface finishes are common to as-built AM parts. Particulary in metal AM, often post-processing is required to improve surface quality. Centrifugal disc finishing (CDF) is an efficient mass finishing technique that is widely used in traditional manufacturing methods. As-built AM surfaces have unique surface topology based on build orientation that respond differently to mass finishing conditions. This work investigates the effects of AM processing and CDF parameters on evolution of surface topology based on process conditions . Prediction accuracy of 90% was achieved in surface evolution using feature-instance segmentation and machine learning method implemented in this study. The study provides a new insight into achieving desired surface finish in metal AM for complex geometries via mass finishing such as centrifugal disk finishing.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110486"},"PeriodicalIF":6.1,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158589","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}
Pub Date : 2024-12-26DOI: 10.1016/j.triboint.2024.110487
Hualong Zhang , Haihua Wu , Xiaolong Wang , Aodong Gao , Liang Gong , Shiyu Zeng , Siwei Li , Mingmin Liu , Yihao Chen
In this paper, selective laser sintering molding technology is used to assemble two materials, namely, flake graphite and spherical graphite, in the form of homogeneous mixing and layered combination, and at the same time, the flake graphite is oriented with 45°deflection to realize multi-materials and structure 3D printing, and then the graphite/SiC composite self-lubricating materials are prepared by melt infiltration silicon treatment. The study found that both the homogeneous mixed type and the layered combination type, with a layer thickness of 1 mm, exhibit excellent friction and wear reduction properties. While forming a uniform and continuous graphite lubrication film, the surface pits facilitate the collection of hard abrasive particles, thereby reducing abrasive wear. Furthermore, the small-sized spherical graphite transitions from sliding to rolling due to the ball bearing effect, resulting in a composite material with a low coefficient of friction (0.15–0.16) and a wear rate of (3.18–5.93 ×10−5 mm3/Nm).
{"title":"Friction and wear behavior of 3D printed graphite/SiC composite self-lubricating materials with multi-materials and structures","authors":"Hualong Zhang , Haihua Wu , Xiaolong Wang , Aodong Gao , Liang Gong , Shiyu Zeng , Siwei Li , Mingmin Liu , Yihao Chen","doi":"10.1016/j.triboint.2024.110487","DOIUrl":"10.1016/j.triboint.2024.110487","url":null,"abstract":"<div><div>In this paper, selective laser sintering molding technology is used to assemble two materials, namely, flake graphite and spherical graphite, in the form of homogeneous mixing and layered combination, and at the same time, the flake graphite is oriented with 45°deflection to realize multi-materials and structure 3D printing, and then the graphite/SiC composite self-lubricating materials are prepared by melt infiltration silicon treatment. The study found that both the homogeneous mixed type and the layered combination type, with a layer thickness of 1 mm, exhibit excellent friction and wear reduction properties. While forming a uniform and continuous graphite lubrication film, the surface pits facilitate the collection of hard abrasive particles, thereby reducing abrasive wear. Furthermore, the small-sized spherical graphite transitions from sliding to rolling due to the ball bearing effect, resulting in a composite material with a low coefficient of friction (0.15–0.16) and a wear rate of (3.18–5.93 ×10<sup>−5</sup> mm<sup>3</sup>/Nm).</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110487"},"PeriodicalIF":6.1,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158535","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}
Pub Date : 2024-12-26DOI: 10.1016/j.triboint.2024.110485
Guixin Hou , Jiao Chen , Wenyuan Chen , Juanjuan Chen , Jun Cheng , Shengyu Zhu , Jun Yang
A few super wear-resistant materials can maintain stable performance in moist environment where WB4-B material as a new superhard material shows a potential for wear resistance. We investigated the wear compatibility of super-hard WB4-B material coupling with steel, Si3N4, Al2O3, and SiC materials, suggesting that WB4-B material against with SiC ceramic exhibits the super wear-resistant and self-lubricating properties with a wear rate to 2.31 × 10−8 mm3N−1m−1 and a friction coefficient to 0.1. The ultra-low wear mechanism is that the combined lubrication film of H3BO3/WO3·H2O/SiO2·H2O synergizes with the superhard properties of WB4-B. These findings provide a reference to the design and development of super wear-resistant materials.
{"title":"Wear compatibility of super-hard WB4-B tribo-pair materials in moist environments","authors":"Guixin Hou , Jiao Chen , Wenyuan Chen , Juanjuan Chen , Jun Cheng , Shengyu Zhu , Jun Yang","doi":"10.1016/j.triboint.2024.110485","DOIUrl":"10.1016/j.triboint.2024.110485","url":null,"abstract":"<div><div>A few super wear-resistant materials can maintain stable performance in moist environment where WB<sub>4</sub>-B material as a new superhard material shows a potential for wear resistance. We investigated the wear compatibility of super-hard WB<sub>4</sub>-B material coupling with steel, Si<sub>3</sub>N<sub>4</sub>, Al<sub>2</sub>O<sub>3</sub>, and SiC materials, suggesting that WB<sub>4</sub>-B material against with SiC ceramic exhibits the super wear-resistant and self-lubricating properties with a wear rate to 2.31 × 10<sup>−8</sup> mm<sup>3</sup>N<sup>−1</sup>m<sup>−1</sup> and a friction coefficient to 0.1. The ultra-low wear mechanism is that the combined lubrication film of H<sub>3</sub>BO<sub>3</sub>/WO<sub>3</sub>·H<sub>2</sub>O/SiO<sub>2</sub>·H<sub>2</sub>O synergizes with the superhard properties of WB<sub>4</sub>-B. These findings provide a reference to the design and development of super wear-resistant materials.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110485"},"PeriodicalIF":6.1,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158588","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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