Method of making high strength hot pressed si.sub.3n.sub.4

Details Method of making high strength hot pressed si.sub.3n.sub.4 Method of making high strength hot pressed si.sub.3n.sub.4

C - Chemistry, Metallurgy

04

B

25/128

C04B 35/50 (2006.01)

Patent

CA 1227623

Abstract of the Disclosure A method of making high strength silicon nitride is disclosed. A mixture of silicon and reactive oxygen carrying agents it milled to an absolute maximum particle size of 16 microns or less. The milled mixture is com- pacted and heated in a nitrogen atmosphere to substantially fully react the materials to form a Si3N4 comprising body. The body is then hot pressed to full density under reduced pressing conditions.

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