Affiliation:
1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
2. Qingdao Almatis Co., Ltd., Qingdao 266510, China
Abstract
In this paper, the effect of B4C content and heat treatment temperature on microstructure, mechanical properties and oxide resistance of SiC refractory ceramics were investigated. The results show that the inclusion of B4C could improve the crystallinity of gengerated SiC and graphitization. When the B4C content was 6%, the linear change of SiC-based refractory ceramics after heat treatment at 1450°C decreased from 1.39% to 0.58%. At the same time, the cold modulus of rupture and cold compressive strength increased by 1.8 times and 2 times, respectively. Meanwhile, with the increase of B4C content, the oxidation index of the SiC-based refractory ceramics decreased from 30.33% to 16.63% after oxidation at 1400°C.