Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1992-04-09
1994-03-22
Lesmes, George F.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428268, 428289, 428325, 428331, 428469, 428920, 501 53, 501133, B32B 1800
Patent
active
052962881
ABSTRACT:
A protective coating for ceramic materials such as those made of silicon carbide, aluminum oxide, zirconium oxide, aluminoborosilicate and silicon dioxide, and a thermal control structure comprising a ceramic material having coated thereon the protective coating. The protective coating contains, in admixture, silicon dioxide powder, colloidal silicon dioxide, water, and one or more emittance agents selected from silicon tetraboride, silicon hexaboride, silicon carbide, molybdenum disilicide, tungsten disilicide and zirconium diboride. In another aspect, the protective coating is coated on a flexible ceramic fabric which is the outer cover of a composite insulation. In yet another aspect, a metallic foil is bonded to the outer surface of a ceramic fabric outer cover of a composite insulation via the protective coating. A primary application of this invention is as a protective coating for ceramic materials used in a heat shield for space vehicles subjected to very high aeroconvective heating environments.
REFERENCES:
patent: 4093771 (1978-06-01), Goldstein et al.
patent: 4381333 (1983-04-01), Stewart et al.
patent: 5066330 (1991-11-01), Holcombe, Jr.
patent: 5079082 (1992-01-01), Leiser et al.
D. Mui and H. M. Clancy, "Development of a Protective Ceramic Coating for Shutter Orbiter Advanced Flexible Reusable Surface Insulation (AFRSI)", Ceramic Engineering and Science Proceedings, vol. 6, No. 7-8, pp. 793-805 (Jul.-Aug. 1985).
Churchward Rex A.
Kourtides Demetrius A.
Lowe David M.
Brekke Darrell G.
Brown Christopher
Lesmes George F.
Manning John R.
Miller Guy
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