ZHANG Xiaohua, HU Yuehui ,YANG Feng ,XIN Feng, FAN Yuenong, ZENG Qingming, CHEN Yichuang

（School of Mechanical and Electronic Engineering, Jingdezhen Ceramic Institute, Jingdezhen Jiangxi 333403, China）

Abstract:In industrial process of silicon carbide (SiC) smelting, the wear resistant SiC coating was fabricated on the graphite substrate. The formation of SiC coating was discussed. The phase structure and surface morphology were characterized by using x -ray diffractometer (XRD) and scanning electron microscope (SEM). The hardness and wear resistance of SiC coating were analyzed. The results indicate that SiC coating is high temperature stable α-SiC, and the impurity phase of Fe3Si and SiO2 are also present. The surface hardness of SiC coating reaches 1120 HV. The wear mechanism is the particle wear and the SiC coating has excellent wear resistance.

Key words: graphite substrate; SiC coating; superhardness; wear resistance