Tribological behaviors and mechanisms of Ti3AlC2 |
| |
Authors: | Zhenying Huang Hongxiang Zhai Wei Zhou Xin Liu Mingxing Ai |
| |
Affiliation: | (1) School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing, 100044, China |
| |
Abstract: | Tribological behaviors and the relevant mechanism of a highly pure polycrystalline bulk Ti3AlC2 sliding dryly against a low carbon steel disk were investigated. The tribological tests were carried out using a block-on-disk type high-speed friction tester, at the sliding speeds of 20–60 m/s under a normal pressure of 0.8 MPa. The results showed that the friction coefficient is as low as 0.1∼0.14 and the wear rate of Ti3AlC2 is only (2.3–2.5) × 10−6 mm3/Nm in the sliding speed range of 20–60 m/s. Such unusual friction and wear properties were confirmed to be dependant dominantly upon the presence of a frictional oxide film consisting of amorphous Ti, Al, and Fe oxides on the friction surfaces. The oxide film is in a fused state during the sliding friction at a fused temperature of 238–324 °C, so it takes a significant self-lubricating effect. |
| |
Keywords: | Ti3AlC2 friction coefficient wear rate frictional oxide film self-lubricating mechanism |
本文献已被 SpringerLink 等数据库收录! |