为了提高TiAl基合金的抗高温氧化性能，采用热浸镀铝法和热扩散处理工艺在合金Ti-45A1—2Cr-2Nb-0．15B（原子分数，％）表面制备TiAl3涂层。用......

Rocks are composed of mineral particles and micropores between mineral which has a great influence on the mechanical pro......