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AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsHuy K. Tran, William D. Henline, Ming-ta S. Hsu, Daniel J. Rasky, Salvatore R. Riccitiello
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A low-density resin impregnated ceramic article advantageously employed as a structural ceramic ablator comprising a matrix of ceramic fibers. The fibers of the ceramic matrix are coated with an organic resin film. The organic resin can be a thermoplastic resin or a cured thermosetting resin. In one embodiment, the resin is uniformly distributed within the ceramic article. In a second embodiment, the resin is distributed so as to provide a density gradient along at least one direction of the ceramic article. The resin impregnated ceramic article is prepared by providing a matrix of ceramic fibers; immersing the matrix of ceramic fibers in a solution of a solvent and an organic resin infiltrant; and removing the solvent to form a resin film on the ceramic fibers.
A method for making a uniform density resin impregnated ceramic article comprising the steps of
A method for making a uniform density resin impregnated ceramic article comprising the steps of (a) providing a matrix of ceramic fibers;
A method for making a uniform density resin impregnated ceramic article comprising the steps of (a) providing a matrix of ceramic fibers;
A method for making a non-uniform resin impregnated ceramic article where the resin is distributed so as to provide a density gradient along at least one direction of the ceramic article, comprising the steps of (a) providing a matrix of ceramic fibers (b) immersing the matrix of ceramic fibers in a solution of a solvent and a thermoplastic resin having a molecular weight of from 10.sup.3 to less than 10.sup.5 ;
A method for making a non-uniform resin impregnated ceramic article wherein the resin is distributed so as to provide a density gradient along at least one direction of the ceramic article, comprising the steps of (a) providing a matrix of ceramic fibers;
Dependencies are inferred from the claim text.