碳纳米管在铜基体中对干滑动和边界润滑条件下力学特性及摩擦学行为的影响。

Effect of CNTs in Copper Matrix on Mechanical Characteristics and Tribological Behavior under Dry Sliding and Boundary Lubrication Conditions.

作者信息

Zhao Lin, Yao Pingping, Zhou Haibin, Gong Taimin, Deng Minwen, Zhang Zhongyi, Xiao Yelong, Deng Hui, Li Yang, Luo Fenghua

机构信息

State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China.

出版信息

Materials (Basel). 2019 Jul 9;12(13):2203. doi: 10.3390/ma12132203.

DOI:10.3390/ma12132203

PMID:31323910

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6650956/

Abstract

In the present work, the mechanical and tribological properties of carbon nanotube (CNT)-reinforced Cu matrix composites featuring 0-1.8 vol% CNTs prepared by spark plasma sintering under dry sliding and boundary lubrication conditions were investigated. The results of microstructure revealed that the bonding interface in Cu/CNT composites was very well established. Additionally, the addition of CNTs has a positive effect on improving the hardness and tensile strength of the composites, while the stress-strain response quasi-static tensile test confirms the same results. CNTs are proved to lead to certain self-lubrication. The addition of CNTs could result in decreased coefficient of friction (COF) and wear rates by reducing adhesive wear under dry sliding conditions, while the oil lubricating film was the major reason for decreased COF under boundary lubrication conditions.

摘要

在本研究中，对通过放电等离子烧结制备的、含有0 - 1.8体积%碳纳米管（CNT）的碳纳米管增强铜基复合材料在干滑动和边界润滑条件下的力学和摩擦学性能进行了研究。微观结构结果表明，铜/碳纳米管复合材料中的结合界面建立得非常好。此外，碳纳米管的添加对提高复合材料的硬度和拉伸强度有积极作用，同时准静态拉伸试验的应力 - 应变响应也证实了相同的结果。碳纳米管被证明具有一定的自润滑作用。在干滑动条件下，碳纳米管的添加通过减少粘着磨损可导致摩擦系数（COF）和磨损率降低，而在边界润滑条件下，油润滑膜是摩擦系数降低的主要原因。