摘要
High-speed friction and wear behaviors of bulk Ti3SiC2 sliding drily against low carbon steel were investigated. Tests were carried out using a block-on-disk type tester with normal pressures ranging from 0.1 to 0.8 MPa and several sliding speeds from 20 to 60 m/s. The results show that, in the case of sliding speeds of 2040 m/s, the friction coefficient exhibits a decreasing tendency with increasing the normal pressure after an increment in the smaller pressure range, and the worn quantity of Ti3SiC2 exhibits a nearly linear increase with increasing the normal pressure. However, when the sliding speed is up to 60 m/s, the friction coefficient exhibits a monotonous increase and the worn quantity exhibits a quadric increase with increasing the normal pressure. These speed-dependent and pressure-dependent behaviors are attributed to the antifriction effects of a frictionally generated oxide film covering the friction surface of Ti3SiC2, and a balance between the generating rate and the removing （wearing） rate of the film.
High-speed friction and wear behaviors of bulk Ti_3SiC_2 sliding drily against low carbon steel were investigated. Tests were carried out using a block-on-disk type tester with normal pressures ranging from 0.1 to 0.8 MPa and several sliding speeds from 20 to 60 m/s. The results show that, in the case of sliding speeds of 2040 m/s, the friction coefficient exhibits a decreasing tendency with increasing the normal pressure after an increment in the smaller pressure range, and the worn quantity of Ti_3SiC_2 exhibits a nearly linear increase with increasing the normal pressure. However, when the sliding speed is up to 60 m/s, the friction coefficient exhibits a monotonous increase and the worn quantity exhibits a quadric increase with increasing the normal pressure. These speed-dependent and pressure-dependent behaviors are attributed to the antifriction effects of a frictionally generated oxide film covering the friction surface of Ti_3SiC_2, and a balance between the generating rate and the removing (wearing) rate of the film.
出处
《中国有色金属学会会刊：英文版》
CSCD
2005年第2期266-269,共4页
Transactions of Nonferrous Metals Society of China
基金
Project(2003AA332080) supported by Hi tech Research and Development Program
Project(50472045) supported by theNational Natural Science Foundation of China
Project(JXJ04008) supported by the Science Developing Fund of Beijing Jiaotong Universi ty
关键词
耐摩擦性
磨损性质
Ti3SiC2松散材料
氧化膜
Ti_3SiC_2
tribological behavior
oxide film
antifriction effect
sliding speed
normal pressure
