Effect of Rare Earth Oxides on Densification and Mechanical Properties in β-SiAION Ceramics
CHEN Hong-Guang; SUN Wei-Ying(State Key Lab on High Pedermancc Ceramics and Superfine Micrstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai 200050 China)
The effects of mixed rare earth oxides on densification, microstructure and mechanical properties Dy-β-SiAlON ceramics were investigated. It was found that the densities and mechanical properties were improved while Dy'+ was half replaced by Sm3+, but there was no such effect found while replaced by Y3+. It was also observed that the growth of β-SiAlON grains was restrained while Sm2O3 was added.