METHOD OF MAKING CERAMIC COMPOSITE ARTICLES Russian patent published in 1994 - IPC

FIELD: fabrication of composite ceramic articles. SUBSTANCE: method involves relative orientation of the body of main metal and permeable mass of refractory filler material to form products of oxidation reaction, heating in gaseous oxidizing fluid at a temperature higher than the melting temperature of the main metal, but lower than the melting temperature of the product of oxidation reaction for 10 to 95 hours, and holding in gaseous oxidizing fluid at this temperature for 2 to 400 hours for the metal and the product of its reaction with gaseous oxidizing fluid to penetrate the mass of filler material. The first source of main metal is formed from the main metal and tank containing molten main metal communicating with first source to be replenished as the metal is depleted for oxidation reaction from the tank of molten main metal. Used as the main metal is titanium, or zirconium, or silicon, or tin, or aluminum alloy. Used as the aluminum alloy is an alloy of aluminum with magnesium, silicon, chromium, zinc, and iron taken in the quantity of 0.1-13 mass per cent each. Used as the refractory material is an oxide, nitride, boride, or carbide. The refractory material has preferably the form of powder, or granules, or fibers. Used as the gaseous fluid is air, or nitrogen-containing gas. A layer of solid oxidant is applied to the surface of the first source of main metal in the form of aluminum alloy. Mold can be introduced to the permeable mass of filler material. At least part of the surface of the permeable mass of the filler or mold is confined by a barrier acting to prevent formation of metal and product of reaction with gaseous fluid. EFFECT: enhanced efficiency of the method. 10 cl