GROWTH MECHANISM OF TiC WHISKERS PREMRED BY A MODIFIED CHEMICAL VAPOR DEPOSITION METHOD

查看全文 作　　者：J.S. Pan and Y. W. Yuan (Department of Materials Science and Engineering, Tsinghua Universityt Beijing 100084, China)(Department of Materials Science and Engineering, Tsinghua Universityt Beijing 100084, China) 出　　处：《Acta Metallurgica Sinica(English Letters)》索引1999年第12卷第3期,共5页 摘　　要：High quality TiC whiskers have been prepared by a modified chemical vapor deposition (CVD) method using TiCl4 and CH4 as reactant gases and Ni as substrate. The deposition temperature and gas flow mies have ampreciable effect on the whisker growth.The whisker orientations and morphology are determined by X-my diffraction (XRD),scanning electron micmpmph (SEM) and transmission electron microgmph (TEM).In addition to the spherical tips, spiral growth microsteps and obvious terraces are observed at the tips and side faces of whiskers in the present eoperiment. The whiskers grow mostly along (100) direction. The whisker growth mechanism is discussed in detail. 关 键 词：TIC WHISKER CHEMICAL vapor DEPOSITION (CVD) growth mechanism