| Autor: |
Minwen Deng, Zongxiang Jin, Zhongyi Zhang, Taimin Gong, Lin Zhao, Haibin Zhou, Pingping Yao, Xiaoting Zuo, Yelong Xiao |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Wear. 320:127-134 |
| ISSN: |
0043-1648 |
| DOI: |
10.1016/j.wear.2014.09.005 |
| Popis: |
The tribological properties of a copper matrix composite (Cu-MMC) for use in spacecraft rendezvous and docking operations were investigated using a special ground system that was capable of testing at various temperatures and pressures. The temperature range was between −100 °C and +100 °C, and pressures ranged from ambient to as low as 1×10 −4 Pa. The results indicate that the friction and wear behavior were identified as a function of the operation conditions. During braking operations, Cu-MMC showed the steady-state friction characteristics in air at 25 °C and in vacuum at −100 °C. In vacuum at 25 °C and 100 °C, the mean friction coefficients ( μ mean ) exhibited significant fluctuations and the wear rates increased remarkably. While in the process of clutching operations, the tribological performances showed little sensitivity to friction cycles in air at 25 °C, in vacuum at 25 °C and 100 °C. But the friction became unstable in vacuum at −100 °C. Examinations, analyses and profiles of the friction surfaces and subsurfaces corroborated the correlation between environments and tribological behavior and wear mechanism. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect