PROCESS FOR FORMING CERAMICS

摘要

CASE 452 PROCESS FOR FORMING CERAMICS A process for forming ceramics comprises mixing titanium nitride with an average particle size less than 0.2 micron, zirconia having a particle size less than 1 micron and a stabilising agent for stabilising the zirconia in the tetragonal or cubic phase forming the mixture into a desired shape and firing at between 1300 and 1700.degree.C. Preferably the stabilising agent is in the form of coating on the zirconia. The process is suitable for forming hard and tough ceramics which are electroconducting and can be shaped by electro-discharge machining. It is particularly suitable for forming ceramics containing between 70 and 90% by weight titanium nitride.