| 摘要 |
PROBLEM TO BE SOLVED: To provide a porous silicon carbide sintered product having high porosity and excellent strength characteristics, and to provide a method for producing the same. SOLUTION: This porous silicon carbide sintered product having a porosity of 40-80% comprises a composite tissue structure in which silicon carbide granules and a fibrous silicon carbide obtained by silicifying carbon fibers are homogeneously dispersed. This method for producing the porous silicon carbide sintered product comprises mixing the mixture of silicon carbide powder, carbon powder subjected to an oxidation treatment, and silicon powder with 0.5-10 wt.% of carbon fibers whose surfaces are subjected to an oxidation treatment, molding the mixture, subjecting the molded product to a heating treatment at a temperature of 1,800-2,100 deg.C in a non-oxidizing atmosphere and subsequently removing the unreacted silicon, or mixing the mixture of silicon carbide powder and carbon powder subjected to an oxidizing treatment with 0.5-10 wt.% of carbon fibers subjected to an oxidizing treatment, molding the mixture, impregnating the molded product with melted silicon, thermally treating the impregnated product at a temperature of 1800-2100 deg.C in a non-oxidizing atmosphere, and subsequently removing the unreacted silicon. |
