seen framstella a foremal of silicon nitride by isostatic pressing of powder of silicon nitride - silicon free

摘要

A powder of silicon nitride containing free silicon, or a body preformed from the powder, is sintered and isostatically pressed into an article, after first filling spaces between the powder particles, or pores in the preformed body, respectively, with nitrogen. When the powder or the preformed body, respectively, is heated, nitrogen and silicon combine to form silicon nitride