ZHANG Li ¹ WU Qide ² XIANG Haibo ¹ XU Hongmin ¹ WANG Kegang ¹

(1. ZiBo Entry-exit insepetion and quarantine bureau, ZiBo 255031; 2. Key :aboratory of Silicate Materials Science and

Enginneering Ministry of Education. Wuhan, University of technology, Wuhan 430070 )

Abstract:α-cordierite glass-ceramic bonded silicon carbide (SiC) porous compound material with high intensity was prepared by adding MAS (MgO－Al₂O₃－SiO₂) glass to SiC through the heat treatment of 750℃×2h/1200℃×2h. The thermal-expansion coefficient of α-cordierite glass-ceramic was measured. And the coring temperature and the crystallization temperature of the MAS glass were analyzed using DTA. The material's phase composition and microstructure were characterized by XRD and SEM respectively, while the intensity of the material was also measured. Through the established model, the residual stress of α -cordierite glass -ceramic boundary was calculated. The results demonstrated that the thermal -expansion coefficient of MAS (MgO－Al₂O₃－SiO₂) glass wa s 4.04×10^-6/K, and the fracture resistance intensity of silicon carbide (SiC)porous compound material was 131Mpa.

Keywords:silicon carbide, α-cordierite glass-ceramic, high intensity porous material, residual stress