AbstractTribology properties of C/C composites under different load and condition were tested by MM-W1 vertical universal friction and wear tester. The surface microstructure after tests were observed with scanning electron microscopy (SEM). The results show that all friction coefficients under dry, water and oil conditions gradually increased with time, and then remains stable. The friction coefficient decreases with the increasing load under a dry condition. The friction coefficient reaches maximum and the mass lose reaches minimum under a dry condition with the same load. A complete and smooth wear debris film is formed under a dry condition, effectively reducing contact between the C/C composites and friction parts, leading to a decreased wear rate. The lubricating film in the water and oil situation reduces the friction coefficient, but hinders the formation of wear debris film, resulting in an increased wear rate.
Received: 11 January 2017
Published: 26 December 2018