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AssigneeFrenton Ltd.
InventorsAnatoly Birukov, Sergey Gordeev, Vladimir Morozov, Sergey Zhukov
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A refractory material powder of a carbide-forming metal or alloy is formed into an intermediate body having a shape and size corresponding to the desired shape and size of the article. The intermediate body is exposed to a gaseous hydrocarbon or a mixture of hydrocarbons at a temperature exceeding the decomposition temperature for the hydrocarbon or hydrocarbons until the mass of the intermediate body has increased by at least 3%. The intermediate body is thereafter exposed to a temperature of 1000-1700° C. in an inert atmosphere if the temperature during exposure to the hydrocarbon or hydrocarbons was too low to ensure a complete carbidization of the intermediate body.
A method of forming a refractory article including the step of forming a powder material into an intermediate body having a shape and size corresponding to the desired shape and size of the article, characterised by choosing a carbide-forming metal or metal alloy as material for the intermediate body, exposing the intermediate body formed to a gaseous hydrocarbon or a mixture of hydrocarbons at a temperature exceeding the decomposition temperature for the hydrocarbon or hydrocarbons until the mass of the intermediate body has increased by at least 3%, and thereafter exposing the intermediate body to a temperature of 1000-1700° C. in an inert atmosphere, thereby creating a continuous metal carbide skeleton body.
A refractory article, characterised in that it consists of a single continuous metal carbide skeleton body having a porosity of 8-75% vol, the metal component being a metal or a metal alloy.
Dependencies are inferred from the claim text.