Si.sub.3n.sub.4 having high temperature strength and method

Details Si.sub.3n.sub.4 having high temperature strength and method Si.sub.3n.sub.4 having high temperature strength and method

B - Operations, Transporting

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B24D 3/16 (2006.01) C04B 35/58 (2006.01) C04B 35/584 (2006.01) C04B 35/593 (2006.01)

Patent

CA 1131257

ABSTRACT OF THE DISCLOSURE Polycrystalline ceramic bodies of Si3N4 when prepared to obtain an intergranular phase which is substantially crystalline, exhibits significantly improved mechanical strength at elevated temperatures above 1,000°C up to 1600°C over bodies having glass-containing intergranular phases.

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