TANTALUM CARBIDE-COVERED CARBON MATERIAL AND PROCESS FOR PRODUCING THE SAME

摘要

This invention provides a tantalum carbide-covered carbon material, which has excellent corrosion resistance to reducing gases and thermal shock resistance at high temperatures, and a process for producing the same. The tantalum carbide-covered carbon material comprises a carbon base material and a covering film provided on the carbon base material directly or through an intermediate layer. The covering film is formed of a large number of densely aggregated fine crystals of tantalum carbide. Preferably, the covering film exhibits such an X-ray diffraction pattern that the diffraction intensity based on (220) face of tantalum carbide is the highest intensity. More preferably, this diffraction intensity is not less than four times higher than the second highest diffraction intensity.