DIAMOND SINTERED COMPACT AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To produce a diamond sintered compact having chipping, heat and acid resistances under conditions capable of industrial production. SOLUTION: This diamond sintered compact consists of 0.1-30vol.% material made of a compd. contg. Si, Ti and O and the balance diamond, and a silicon oxide-titanium oxide mixture is used as a sintering aid. This powder is mixed with diamond powder, non-diamond powder or a mixture of them and the resultant mixture is sintered by holding under conditions of pressure and temp. in a region in which diamond is thermodynamically stable.