Ceramic composition

摘要

An improved ceramic composite material is provided based on zirconia and boron nitride that can be satisfactorily bonded without sintering. The material comprises a particulate mixture of boron nitride, stabilized zirconia and silicon nitride bonded together by whiskers of silicon nitride. The silicon nitride whiskers may conveniently be formed in-situ by heating the mixture of particulate boron nitride, stabilized zirconia and silicon nitride together with powdered metallic silicon in an atmosphere of nitrogen.