WANG Xingguo¹, LUO Rong¹, CHEN Tao¹, SHAN Yingchun ², FAN Yuenong ¹

(1. School of Mechanical and Electronic Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China;

2. Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, Liaoning, China)

Abstract: The friction and wear properties of Sialon ceramic composite materials at high temperature were researched with a self-designedhigh temperature pin-on-disk tester heated by middle frequency induction, and then the composition and the preparation method of a Sialon ceramic material with better high temperature wear resistance were optimized. The results show that when the load was 20N and the pin-ondisk circumrotating speed was 360r/min, the main wear mechanisms at high temperature were mainly oxidation wear and adherence abrasive wear, the combined effect of the friction heat and the external heat source on the wear surface engendered the recrystallization and oxide debris, which led to a white layer on the wear surface. The wear loss and coefficient of friction decreased with temperature increasing. A Sialon ceramic composite material with optimal wear resistance was obtained, when the sintering temperature was 1900 °C and the added amount of BN was 5wt.%.

Key words: Sialon ceramic; high temperature wear; wear mass loss; friction coefficient