C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/1
C04B 35/58 (2006.01) C04B 35/593 (2006.01)
Patent
CA 1125790
46,833 SILICON NITRIDE COMPOSITIONS IN THE Si3N4-Y2O3-SiO2 SYSTEM Dense, ceramic compositions fabricated within the Si3N4-Si2N2O-Y2Si207 compatibility triangle in the Si3N4- SiO2-Y203 system are extremely stable in oxidizing environ- ments and particularly suited for use as a high temperature structural material. In addition, the hot-pressed, densi- fied articles fabricated from compositions within the com- patibility triangle exhibit improved strength and creep resistance at elevated temperatures relative to commercial Si3N4.
290783
Lange Frederick F.
Singhal Subhash C.
Mcconnell And Fox
Westinghouse Electric Corporation
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