Phase Transformation of α-β-Sialon by Heat Treatment
Sun Weiying; Wang Peiling; Chen Jianxin; Jia Yingxin (The State Key Lab on High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai 200050 China)
?Sialon→ β-Sialon transformation more or less occurs during heat treatments. The tendency of the transformation increases with increasing liquid phase in the compositions and is also related with the Z-value of the rare-earth elements. For lower La Z-values, this phase transformation is more easy to occur.On the basis of the phase relationships in the Ln-Si-Al-O-N systems and the characteristics of the α-sialon formation, the mechanism of α-Sialon→β-Sialon transformation was discussed.
【CateGory Index】： TQ174.1