Composite nitride sintered body.

摘要

A composite nitride sintered body consisting essentially of aluminium nitride, boron nitride and at least one metal compound selected from the group consisting of compounds of metals of Groups IIa and ilia of the periodic table.

The composite nitride sintered body is produced by intimately mixing a powder of aluminium nitride, a powder of boron nitride and at least one metal compound selected from the group consisting of metal compounds of metals of Groups IIa and IIIa of the periodic table, and sintering the mixture under atmospheric or elevated pressures at a temperature in the range of 1600 to 2400 °C.

The sintered body has a good machinability.