Abstract
C/SiC composites were prepared by pulse chemical liquid–vapor deposition (pulse CLVD) process in 3h with liquid polycarbosilane as precursor. The microstructure and properties of the C/SiC composites were studied. The results show that the apparent density and open porosity of the C/SiC composites are 1.81 g⋅cm−3 and 8.0%, respectively. The matrix consists of β-SiC, α-SiC and pyrolytic carbon, with the grain size of β-SiC of ~42nm. And the carbon fiber adheres to the matrix with a strong interface, therefore the C/SiC composites exhibit a brittle fracture behavior with flexural strength of 138.0MPa, flexural modulus of 31.0GPa.
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