Method of making thermal-shock resistant molded articles on the basis of silicon carbide

摘要: Refractory parts or articles, even of very large dimensions, are made with starting material carbon particles mixed silicon in a predetermined ratio which is suspended solution binder, after the suspension squirted into precipitating liquid to coat solids then being separated and dried, molded under slight pressure, coked (at 800°-1,000° C.), rapidly raised temperature (to 1,400°-1,600° C.) for formation carbide throughout article. It useful add powdered mix it before coking step and, also, hold heated body at somewhat below 1,400° C. long enough remove gradients within it, followed by rapid heating up carbide-forming temperature. The porous bodies thus formed can be reduce porosity impregnation powder resin, again coked, may carried out on completely fired body, resin molten metal, evacuation application pressure impregnating fluid.