材料期刊网

The microstructure of fiber-like SiC/Si3N4 composite particulate was investigated using high-resolution transmission electron microscopy techniques. The SiC/Si3N4 composite particulate consisted of a beta-SiC core and a alpha-Si3N4 outer shell. Two kinds of composite particulate were distinguished when the observed orientation of the SiC core was <1 1 0>. In one type of the SiC/Si3N4 composite particulate, a crystal relationship of (1 1 1) beta-SiC parallel to (1 0 2) alpha-Si3N4 and (1 1 1) beta-SiC parallel to (1 1 4) alpha-Si3N4 was identified; in the other type of the SiC/Si3N4 composite particulate, a crystal relationship of (1 1 1) beta-SiC parallel to (0 0 1) alpha-Si3N4, and (1 1 1) beta-SiC parallel to (1 0 1) alpha-Si3N4 was observed.