SiC-Si.sub.3 N.sub.4 Composite system for special heat-resisting

Details SiC-Si.sub.3 N.sub.4 Composite system for special heat-resisting SiC-Si.sub.3 N.sub.4 Composite system for special heat-resisting

1980-11-26

1982-06-15

Peters, G. O.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

C04B 3556, C04B 3558

Patent

active

043352170

ABSTRACT:
A SiC-Si.sub.3 N.sub.4 composite system for special heat-resisting ceramic materials which is fabricated by firing in a nitriding gas atmosphere a green compact prepared from and composed of, as starting materials, silicon powder and an organic silicon polymer containing carbon and silicon atoms as the major skeletal components, whereby said composite system, as a final fired compact has an interwoven texture of SiC and Si.sub.3 N.sub.4 with sufficient micro gaps to absorb thermal stresses, wherein the quantitative ratio by weight of SiC to Si.sub.3 N.sub.4 in said composite system being in the range of 5%-20%:95%-80%.

REFERENCES:
patent: 3853567 (1974-12-01), Verbeek
patent: 3892583 (1975-07-01), Winter
patent: 4097294 (1978-06-01), Rice et al.
patent: 4127411 (1978-11-01), Yajima et al.
patent: 4177230 (1979-12-01), Mazdiyasni

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