C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 41/87 (2006.01) C04B 41/89 (2006.01) C01B 31/30 (2006.01)
Patent
CA 2559042
The problem of the present invention is provision of a tantalum carbide-coated carbon material having superior corrosion resistance to reducing gas and superior resistance to thermal shock at a high temperature and a production method thereof. According to the present invention, a tantalum carbide--coated carbon material having a carbon substrate and a coating film formed directly or via an intermediate layer on the aforementioned carbon substrate can be provided. The coating film consists of a number of microcrystals of tantalum carbide, which are densely gathered and, in an X-ray diffraction pattern of the coating film, the diffraction intensity of the (220) plane of tantalum carbide preferably shows the maximum level, more preferably, the aforementioned diffraction intensity is not less than 4 times the intensity of the second highest diffraction intensity.
L'invention porte: sur un matériau de carbone recouvert de carbure de tantale offrant une excellente résistance à la corrosion par les gaz réducteurs, et aux chocs thermiques à haute température, et sur son procédé de production. Ledit matériau comporte une base de carbone et un film de revêtement appliqué sur la base directement ou par l'intermédiaire d'une couche intermédiaire. Le film de revêtement qui consiste en un grand nombre de fins cristaux de carbure de tantale densément agrégés, présente de préférence un réseau de diffraction aux rayons X tel que l'intensité de diffraction (220) de la surface de carbure de tantale présente la plus forte intensité, et pas moins de quatre fois plus que l'intensité de diffraction venant en second.
Abe Yoshihisa
Fujiwara Hirokazu
Yamada Norimasa
Fetherstonhaugh & Co.
Toyo Tanso Co. Ltd.
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