Process for sintering silicon nitride compacts

Details Process for sintering silicon nitride compacts Process for sintering silicon nitride compacts

1980-08-25

1982-10-19

Parrish, John A.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

501154, C04B 3558

Patent

active

043549900

ABSTRACT:
Sintered silicon nitride articles are prepared by sintering a silicon nitride compact of a density of at least 1.3 g/cm.sup.3 in nitrogen gas atmosphere at substantially atmospheric pressure, while the compact is embedded in a protective powder comprising silicon nitride, boron nitride, or a mixture of silicon nitride and boron nitride, and one or more sinterization additives for silicon nitride, said additives being present in the protective powder in an amount of from 3 to 20% by weight.

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