At the beginning of the interfa cial reaction,there appears a layer of TiC and Ti 3 Si with fine grains. A layer of TiC and a layer of Ti 3 Si with large grains were formed due t o element diffusion and reaction dur ing composite consol-idation.

• 反应初期形成晶粒非常细小的TiC,Ti5Si3,晶粒较大的TiC和Ti3Si是由于元素扩散和反应所形成。