SCHNEIDWERKZEUG AUF NITRIDBASIS.

摘要

A nitride based ceramic cutting tool is described comprising from 50 to 90% by weight Si2N4, from 5 to 45% by weight TiN, and from 5 to 45% by weight sintering aid, said sintering aid comprising (1) at least one of Y2O3 and Dy2O3 and (2) Al2O3 alone or a mixture of AlN and Al2O3, said mixture comprising from 5 to 65% by weight AlN, and the weight ratio of (1) at least one of Y2O3 and Dy2O3 to (2) Al2O3 alone or the AlN and Al2O3 mixture being 3:1 to 1:3.