Host: The Ceramic Society of Japan
Core-shell-structured micron spheres of SiC-Si consisting of a layer of silicon carbide nanocrystallites and a silicon single-crystal core were synthesized by thermal plasma carbonization of in-flight silicon micron powders in CH4. TEM showed a uniform distribution of SiC nano-sized grains (∼80 nm) at a depth of 500 nm beneath the surface of the composite spheres. Micron voids and nano pores were observed at the SiC-Si interface and in the Si matrix. The formation of long and thick SiC nanotubes was observed in the Si matrix near the SiC-Si interface.
