Alumina based ceramic material and method of manufacturing the same.

摘要

A mixed powder containing: 5-30 wt% of SiC whiskers; 3-30 wt% of a sintering auxiliary agent composed of one kind or more of oxides of Mg, Si, Ca, Ti, Zr, Cr, Ni, Y and rare earth elements; and an Al2O3 powder as a base material; or further containing 0.5-40 wt% of one kind or more of compounds composed of one kind or more of transient elements in the groups IVa, Va, and VIa of the periodic table and one kind or more of C, N and B, are compacted and subjected to pressureless-sintering in a nitrogen containing inert gas atmosphere at a temperature between 1500 and 1900 DEG C. With this method, the SiC Whiskers containing Al2O3 based ceramic material, which is densified and has a sufficient strength and toughness, can be formed in a complex shape and a large size.