METHOD FOR PRODUCING BONDED MATERIAL OF TANTALUM AND CARBON, GRADIENT COMPOSITION STRUCTURE OF TANTALUM AND CARBON, METHOD FOR PRODUCING TANTALUM TUBE AND PIT CARBON CORE, TANTALUM TUBE AND PIT CARBON CORE, METHOD FOR PRODUCING TANTALUM CARBIDE WIRE, AND TANTALUM CARBIDE WIRE

摘要

PROBLEM TO BE SOLVED: To bond tantalum of a predetermined shape and carbon by solid phase diffusion welding and form carbide on the surface of tantalum other than the portion where tantalum and carbon are subjected to solid phase diffusion welding by a simple method.

SOLUTION: Tantalum or a tantalum alloy and a carbon substrate are placed in a vacuum heat treatment furnace, heat-treated under such a condition that Ta2O5being a naturally oxidized film to be formed on the surface of tantalum or the tantalum alloy sublimes and further heat-treated after the Ta2O5is removed while introducing a carbon source into the vacuum heat treatment furnace. As a result, the surface of tantalum or the tantalum alloy is bonded to the surface of the carbon substrate by solid phase diffusion welding and simultaneously the carbide is formed on the surface of tantalum other than the portion where tantalum and carbon are subjected to solid phase diffusion welding.

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