<報文>バナジウム金属と黒鉛の高温反応に関する研究

概要

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The reactivity of pure vandium metal associated with graphite was studied in the temperature range of 1000 to 1300℃. From the present results of X-ray diffraction and EPMA analysis, the reaction products are found to be two kinds of vanadium carbides, i.e. VC and V_2C, and the homogeneous ranges of both of the carbide phases are determined. It was also found that each layer growth rate of the two carbides follows the parabolic growth law and the reaction rate constants of both layers can be expressed by the following equations : [numerical formula] [numerical formula] The mean chemical diffusion coefficients of carbon in the carbides are obtained, using the theoretical analysis which is a modification of the Wagner's theory as advocated by U. Roy. The results are as follows. [numerical formula] [numerical formula]
東北大学の論文
1976-03-30