Article
Materials Science, Multidisciplinary
Yaochuan Li, Jianxiang Huang, Man Wang, Junwu Liu, Chengyong Wang, Honghai Zhong, Yang Jiang
Summary: The study revealed that the friction and wear behaviors of Cu/SC composites are influenced by the graphite content and current levels. As the graphite content increased, the friction coefficient and wear rate decreased.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Zhenghai Yang, Yingjian Song, Jinlong Jiao, Wenbo Li, Bao Shangguan, Yongzhen Zhang
Summary: This study investigated the friction, wear properties, and current-carrying properties of copper-graphite composites paired with brass C28000. The results showed that the current-carrying properties of the composite materials were excellent, but their wear rate was the main limiting factor. Furthermore, an increase in the thickness of the graphite layer led to an improvement in the uniformity of damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Materials Science, Multidisciplinary
Xinlong Liu, Mingjie Hu, Zhihao Li, Chaowei Zhou, Qian Xiao, Wenbin Yang, Daoyun Chen
Summary: This study investigates the influence of temperature and copper content on the friction performance of carbon brushes, with results showing that copper content has a critical effect on friction performance, leading to a dramatic increase in wear rate for the high copper content group at high temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Mechanical
Yuankai Zhou, Mengdi Du, Xue Zuo
Summary: The influence of current on the temperature rise and wear mechanism of the copper-graphite friction pair was studied using pin-disc current-carrying friction experiments under different current conditions. The results showed that the temperature of the friction pair increases with current, and the main wear mechanism changes from material spalling to melt ejection and arc erosion. Changes in the lubricating film led to complex wear behavior.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Chemical
Ruoxuan Li, Seiji Yamashita, Katsumi Yoshida, Hideki Kita
Summary: The purpose of this study was to investigate the influence of different counterbodies on Cu-MgPG composite materials and find the best material combination in terms of friction coefficient and specific wear amount. The results showed that the addition of magnesium phosphate treated graphite can reduce the friction coefficient and is related to the oxidation behavior of the sliding material.
Article
Metallurgy & Metallurgical Engineering
Tu Chuan-jun, Gong Pei, Ren Gai-mei, Chen Gang, Chen Jian, Hong Li-rui, Liu Ping
Summary: Resin matrix carbon brush composites reinforced with tungsten copper composite powders exhibit low wear rate and friction coefficient, effectively reducing wear.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Materials Science, Multidisciplinary
Boyong Ren, Chenyu Gao, Wei Wu, Jiaxing He, Junwu Liu, Honghai Zhong, Yang Jiang
Summary: The Cu/C composites have potential applications in high-speed railway pantograph sliders due to the self-lubrication and conductivity. However, the poor wettability between Cu and C affects the bonding strength. In this study, chromium powder was added to improve the bonding by forming Cr3C2 at the interface. The addition of chromium also enhances the mechanical and current-carrying wear performances. The Cr-Cu/C composite with 0.48wt% Cr exhibits the best comprehensive performance and lowest wear rate and friction coefficient.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Engineering, Mechanical
Jing Zhao, Yitian Peng, Qianguang Zhou, Kun Zou
Summary: Cu/graphene composites exhibit excellent current-carrying tribological properties, with the introduction of graphene enhancing friction reduction and anti-wear properties.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Mechanical
Shaolin Li, Chaofan Jia, Xiuhua Guo, Kexing Song, Xu Wang, Hao Guo, Juanhua Su
Summary: Cf-Al2O3/Cu composites were fabricated using powder metallurgy and internal oxidation, and their microstructure, electrical contact properties, and tribological properties were characterized. The results showed that the addition of an appropriate amount of carbon fibers improved the tribological properties of Al2O3/Cu composites. The composites exhibited a lower friction coefficient (0.182) and a 64.2% reduction in specific wear rate compared to Al2O3/Cu composites. The reduction in arc erosion resulted in a smoother friction surface, improved friction stability, and prevention of concentrated arc erosion at the bumps.
Article
Materials Science, Composites
Serhat Sap, Usame Ali Usca, Mahir Uzun, Khaled Giasin, Danil Yu Pimenov
Summary: This research focuses on evaluating the mechanical characteristics of high-performance copper composites produced through powder metallurgy. By adding reinforcement elements (Al2O3-Cr3C2) at different rates (3-6-9 wt.%) into copper-graphite (Cu-5Gr) via hot pressing technique, the composites' microstructure, hardness, three-point bending, and wear performance were analyzed. The results show that the hybrid reinforced composites exhibit higher density, hardness, and bending strength compared to Cu-Gr composites. Additionally, the wear resistance significantly increased with the addition of the hybrid reinforcements, achieving improvements in hardness, bending strength, and wear performance by 15.92%, 58.16%, and 83.21% respectively. This study demonstrates that the powder metallurgy process and the addition of reinforcements can enhance certain mechanical properties of copper, expanding its applications in various industries.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Engineering, Mechanical
M. F. C. Ordonez, M. C. M. Farias, S. Descartes, I. F. Machado, R. M. Souza
Summary: Consolidated composites of Astaloy 85Mo with the addition of MoS2, graphite, or a mixture of graphite/MoS2 were prepared using Spark Plasma Sintering. Graphite addition resulted in the formation of a tribofilm, leading to the lowest values of friction and wear; MoS2 composites exhibited an increase in friction coefficient at the highest normal loads. MoS2/graphite composites showed intermediate friction coefficient and the highest hardness.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Jinping Liu, Yi Ding, Ke Sun, Longfei Zeng, Xiangpeng Xiao, Wei Cao, Lijun Guan, Jingyou Ran, Zhe Sun, Shuaifei Shi, Jianbo Zhang
Summary: Copper-graphite sandwich composites prepared by continual annealing and accumulative roll-bonding processes were investigated. The dispersion of graphite particles became more uniform and the hardness of the composites increased with the increase of rolling cycles. The friction coefficient and wear loss of the composites decreased with the increase of rolling cycles.
FRONTIERS IN MATERIALS
(2022)
Article
Engineering, Mechanical
Zhengjie Li, Xiaowen Qi, Changxin Liu, Bingli Fan, Xiao Yang
Summary: This study aims to investigate the effect of polytetrafluoroethylene (PTFE) particle size on the friction and wear properties of glass fiber reinforced epoxy resin composites. The results show that the composite filled with larger PTFE particles has a significantly lower wear rate and exhibits better anchoring of glass fibers compared to composites with other particle sizes.
Article
Polymer Science
R. Keshavamurthy, Vijay Tambrallimath, Ali A. Rajhi, Shabbir R. M. Ahmed, Arun Y. Patil, T. M. Yunus Khan, R. Makannavar
Summary: In this study, ABS composites filled with graphite powder were synthesized using FDM technique. The addition of graphite resulted in weight losses for FDM components and a decrease in coefficient of friction. The wear mechanisms in graphite filled ABS composites and ABS were extensively examined using microscopy techniques.
Article
Chemistry, Multidisciplinary
Hongming Wie, Jianpeng Zou, Xiaoya Li, Cong Xiao
Summary: Copper-graphite composites with different copper content were prepared by SPS, showing variations in density, hardness, friction coefficient, and wear rate in friction testing. Increasing copper content improved density and hardness, while decreasing friction coefficients under dry friction conditions. Water friction conditions resulted in lower friction coefficients and the wear rate was influenced by copper content and etching treatment.