Stock material or miscellaneous articles – Composite – Of silicon containing
Patent
1979-07-02
1981-02-24
Smith, Ronald H.
Stock material or miscellaneous articles
Composite
Of silicon containing
4272554, 427343, 4273722, B32B 904, B32B 1304
Patent
active
042528607
ABSTRACT:
A method is described for increasing the impact properties of dense silicon nitride articles. The method includes the application of a slurry composed predominately of silicon powder to the surface of the dense silicon nitride article. The slurry coated article is then nitrided at an elevated temperature to partially convert the silicon powder to silicon nitride and to bond the particles together and to the substrate. About 15 to 45 volume percent of the silicon powder is not converted to silicon nitride but remains as elemental silicon.
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Poponiak et al. "Formation of Thick Si.sub.3 N.sub.4 or Si.sub.x O.sub.y N.sub.z On Sl Substrate by Anodnitridization", vol. 19, No. 3, Aug. 1976.
Brennan John J.
Galasso Francis S.
Hulse Charles O.
Childs S. L.
Smith Ronald H.
Sohl Charles E.
United Technologies Corporation
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