High Temperature Creep of SiC/β-SiAlON Composite (1)

Abstract

The microstructure and the creep properties of SiC/β-SiAlON composites were investigated. The grain size of β-SiAlON in SiC/ β-SiAlON composites was smaller than that of β-SiAlON ceramics. And a part of sintering aid existed at inside of β-SiAlON grains in SiC/β-SiAlON composites. SiC/β-SiAlON composites and annealed composite were raised the starting temperature of deformation in creep. It is considered that the rising temperatures result from suppressed slipping in the grain boundary, decrease and crystallization of the grain boundary glass phase.