中文摘要：

采用反应熔体渗透法（reactive melt infiltration,RMI）制备了碳/碳化硅（C/SiC）刹车材料,利用X射线衍射分析了材料组成,并通过光学、扫描电子和透射电子显微镜从不同尺度观察了刹车材料的微观结构.结果发现,反应生成的SiC是面心立方的β-SiC,主要分布在胎网层、针刺纤维附近以及无纬布层的纤维束间;残余的单质Si分布在SiC的颗粒间.SiC在SiC-Si界面上,以大约5～15μm的粗大颗粒存在;而在SiC-C界面上,以粒径100nm左右的细小颗粒存在.

英文摘要：

Carbon fiber reinforced silicon carbide matrix （C/SiC） braking materials were prepared by a reactive melt infiltration method. The microstructure characteristics of SiC were studied by means of optical microscope, scanning electron microscope and transmission electron microscope in combination with component analysis by X-ray diffraction. Results show that 3-SIC zone usually forms inside the short-cut fabric, around the needling fibers, and among the fiber bundles in the non-woven web. Residual Si locates among SiC grains. In C/SiC composites, there exist two different areas of SiC, one is coarser 3-SIC grains between 5-15μm at the SiC-Si interface, and the other is a zone of a fine grained β-SIC layer with dimension of about 100nm at the SiC-C interface.