Tensile Fracture Behavior and Strength of Surface‐Modified SiTiCO Fiber SiC‐Matrix Minicomposites Fabricated by the PIP Process

The effect of surface‐modified SiTiCO (Tyranno®) fiber on the tensile behavior of SiC‐matrix minicomposites has been examined. Standard SiTiCO fiber and two kinds of surface‐modified fibers were used and the composites were fabricated by a polymer infiltration pyrolysis process. The strengths of the surface‐modified‐fiber‐reinforced minicomposites were significantly improved compared to that of the standard fiber minicomposite. The scattering of tensile strength also decreased with the use of surface‐modified fibers. The results demonstrate the achievement of SiTiCO‐fiber‐reinforced SiC‐matrix composite by modifying the surface chemistry of the fiber.