Preparation and characterization of porous Si3N4 ceramics prepared by compression molding and slip casting methods

Bulletin of Materials Science

关键词: Porous Si3N4 ceramics;    preparation;    microstructure;    mechanical properties;    gas permeability.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Porous silicon nitride (Si3N4) ceramics were fabricated by compression molding and slip casting methods using petroleum coke as pore forming agent, and Y2O3–Al2O3 as sintering additives. Microstructure, mechanical properties and gas permeability of porous Si3N4 ceramics were investigated. The mechanical properties and microstructure of porous Si3N4 ceramics prepared by compression molding were better than those which were prepared by slip casting method, whereas slip casting method is suitable for the preparation of porous Si3N4 ceramics with higher porosity and excellent gas permeability.

【 授权许可】

CC BY