A TWO-DIMENSIONAL INFILTRATION DYNAMICS MODEL OF C-SiC COMPOSITES

摘要

This article presents the mathematical modeling of Si infiltration material in a porous carbon fiber preforms. Capillary infiltration kinetics in the limit of both interface and diffusion control for situations where the capillary radius decreases with time, and the contact angle was assumed constant during infiltration were studied. One major manufacturing process of the carbon fiber reinforced SiC composite materials is the liquid silicon infiltration(LSI) of a porous carbon fiber preforms to form C-SiC composites. The results show that the large-radius (r_0 = 5 μm) capillary yields faster infiltration kinetics and longer penetration lengths than the small-diameter (r_0 = 1 μm).