METHOD OF MAKING HIGH STRENGTH HOT PRESSED SILICON NITRIDE

摘要

A method of making high strength silicon nitride. A mixture of silicon and reactive oxygen carrying agents is milled to an absolute maximum particule size of 16 microns or less. The milled mixture is compacted 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.