Sintered ceramic composite body and method of manufacturing same.

摘要

A sintered ceramic composite body is manufactured by preparing a powdery mixture composed of a base material composed of either one of oxide ceramic such as alumina, mullite, magnesia, or the like, and nonoxide ceramic such as silicon nitride, sialon, or the like, and a reinforcement material composed of particles of silicon carbide which have a size of 1 mu m or less and a size ranging from 5 to 20 mu m, or have a size of 1 mu m or less and platelet silicon carbide particles having a maximum diameter ranging from 5 to 50 mu m and a thickness which is 1/3 or less of the maximum diameter, the particles of silicon carbide being contained at a volume ratio ranging from 10 to 50 %. The powdery mixture is molded into a shaped product, which is then sintered in a temperature range from 1,400 to 1,900 DEG C for the base material which is composed of oxide ceramic or in a temperature range from 1,500 to 2,000 DEG C for the base material which is composed of nonoxide ceramic. The body has high toughness.