Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1992-06-08
1993-10-19
Lesmes, George F.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428288, 428294, 428408, 428426, 428428, 428432, 428688, 428689, 428697, 428698, 428902, 501 87, 501 88, 501 91, 501 95, 501102, B32B 900, B32B 1800, C04B 3502, C04B 3552
Patent
active
052543978
ABSTRACT:
A coated carbon fiber-reinforced composite material comprising a substrate material which comprises a carbon or ceramic matrix and reinforcing carbon fibers and a coating layer which comprises silicon carbide and at least one material selected from the group consisting of titanium carbide, zirconium carbide and hafnium carbide, wherein a part of the coating layer contacting to the substrate consists of at least one material selected from the group consisting of titanium carbide, zirconium carbide and hafnium carbide, a surface part of the coating layer consists of silicon carbide and a composition in an intermediate part between the part contacting to the substrate and the surface part continuously or stepwise changes from at least one material selected from the group consisting of titanium carbide, zirconium carbide and hafnium carbide to silicon carbide, and a carbon fiber-reinforced composite material comprising a matrix which comprises carbon and oxidation resistant ceramic and reinforcing carbon fiber contained in the matrix and optionally a coating layer which comprises hafnium carbide, wherein both surface parts of the matrix consists of the oxidation resistant ceramic, a center part of the matrix consists of carbon and a composition in each of intermediate parts between each surface and the center part continuously or stepwise changes from the oxidation resistant ceramic to carbon, which have improved oxidation resistance and thermal shock resistance.
REFERENCES:
patent: 3019128 (1962-01-01), Smiley
patent: 4264682 (1981-04-01), Fuyama et al.
patent: 4751099 (1988-06-01), Niino et al.
patent: 4844951 (1989-07-01), Sarin et al.
Igarashi Tadashi
Kawai Chihiro
Lesmes George F.
Sumitomo Electric Industries Ltd.
Withers James D.
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