Improvement of the mechanical and thermophysical properties of C/SiC composites fabricated by liquid silicon infiltration

摘要: Abstract Two different matrices (silicon and Ti 3 SiC 2 ) were introduced into two-dimensional woven C/SiC reinforced with T-300™ carbon fiber (40 vol.%) by liquid silicon infiltration, their mechanical thermophysical properties studied compared those of fabricated chemical vapor infiltration. C/SiC–Si shows higher tensile strength than C/SiC–Ti due to the existence low thermal residual stress (TRS), while interlaminar shear three-point bending can be attributed brittleness dense Si–SiC matrix. The introduction in a matrix cause toughening mechanisms inhibit crack propagation various micro-deformations grains. Therefore, Young’s modulus, conductivity C/SiC–Si. is high TRS .