Silicon nitride compositions

Details Silicon nitride compositions Silicon nitride compositions

2008-07-22

2008-07-22

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Refractory

C501S097400, C089S036020

Reexamination Certificate

active

11378886

ABSTRACT:
The present invention provides silicon nitride with tungsten carbide additives in a sinterable material comprising silicon nitride and tungsten carbide, in which the silicon nitride content is a minimum of about 80% and wherein the total nitride component is about 28-40 w/w % N2, and further comprising about 1.5-3.5 w/w % Al, about 2-6 w/w % Y, about 1.5-7 w/w % W, and about 3-9 w/w % O2. which after sintering will produce ceramic bodies with a high degree of toughness suitable for armor applications.

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