Effect of the surface structure of Si-Ti-C-O fiber on the properties of three-dimensional fiber-reinforced silicon carbide composites

Three-dimensional Tyranno® fiber-reinforced silicon carbide composites were fabricated by using polycarbosilane as the precursor for matrix and some types of fiber with different surface structures. Composites made of a fiber with an excess carbon layer at the surface had the highest values of bending strength and fracture toughness at room temperature. Composites of a fiber with a double layer of oxide and carbon had the largest value of work of fracture and a superior oxidation resistance property.