Process for firing alloys containing easily oxidizable elements

U.S. Patent Number: 5330703

Abstract: A shaped material comprising powders of alloys containing easily oxidizable elements is fired in a hydrogen-based atmosphere containing at least one hydrocarbon gas in a total amount of 0.01-5.0 volume %. Therefore, the amount of oxides formed on the surfaces of material powder particles is reduced, and the sinterability of powder particle surfaces is improved owing to the sticking of atomic carbon thereto and thereby the mutual diffusion of powder particles becomes easy. As a result, there can be obtained a sintered alloy of desired density, superior in oxidation resistance, etc.

Inventors: Ohashi; Tsuneaki (Ohgaki, JP), Tsuno; Nobuo (Kasugai, JP)

Assignee: NGK Insulators, Ltd. (Nagoya, JP)

Application Number: 08/009,959

Issued: 1994-07-19

Expired: 2006-07-19

Classes: 419/57 ; 419/59

Field of search: 419/57,58,59,45

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