抄録
Chemical Liquid Vaporized Infiltration (CLVI) is a rapid densification process with great potentiality. In the present paper, a detailed morphologies and characterizations of matrix pyrocarbons and interfaces as received C/C composites were examined. The effects of the temperature on the microstructures were analyzed. The results showed that, the most matrix pyrocarbon deposited at various temperatures are optically anisotropic and characterized by various amounts of growth cones, and the carbon fibers are surrounded by ring-shaped layers with different optical reflectance at some regions in samples deposited at higher temperature. The SEM morphologies of samples reveal that the growth cones display laminar deposit, which exhibit a preferential orientation of the pyrocarbon layers parallel to the growth surface. Furthermore, TEM images, high resolution lattice images and corresponding SAD diffraction patterns of the matrix pyrocarbons and different levels of interfaces between fiber and matrix, and between different matrix textures, were given and analyzed.
