Mechanical properties of LSI based 3D-stitched-C-SiC composites prepared by coal-tar pitch as carbon precursor

3D-stitched C-SiC composites are fabricated by liquid-silicon-infiltration (LSI) method for thrust-vectoring of a solid propulsion system. Mechanical properties are investigated under bending, tensile, and impact loading at room-temperature. Weibull-modulus approach is applied to analyze bending strength. Weibull-modulus is found to be 10.18 while characteristic strength is 185.7 MPa. Effect of temperature on the bending strength was studied up to 1200 deg. C in air. Micro-hardness is measured at room temperature