High temperature strength of SiC_PCS fiber reinforced Al composite wires

Abstract

Preform wires, which are organosilicone polymer (polycarbosilane) derived SiC fiber reinforced Al composite are expected to be a useful semi-finished material for fabricating FRM. High temperature strength and thermal stability of those preform wires were investigated. The tensile strength of wires at 723K was about 85% of the strength at room temperature. The degradation in the strength was not due to degradation in the fiber strength, and was due to degradation in the transmission ability of stress from the matrix to the fibers. Those preform wires can be used as semi-finished materials without the degradation of strength during fabricating FRM at elevated temperature.