Effect of AIN-polytypoid on Elongated α-Sialon Formation
CHEN Wei-Wu; SUN Wei-Ying; YAN Dong-Sheng(State key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute ofCeramics, Chinese Academy of Sciences, Shanghai 200050, China)
The microstructural characteristic of (Y+Sm) α-Sialon with different amount of AINpolytypoid was studied by SEM and EDS. The formation mechanism of elongated α-Sialon inα'-AIN-polytypoids dual-phases area was discussed. The results show that with increasing amountof AIN-polytypoid, more α-Sialon grains exhibit the enlongated morphology.