<報文>UC_2の窒化

概要

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Fundamental studies were made on the reaction rate between UC_2 and nitrogen in the range from room temperature to 1,000℃ with a thermobalance in nitrogen current at about 1 atm. Within the heating rates and the flow rates of nitrogen adopted in these studies, there was no influence at the beginning temperature of the reaction. The sample was heated at a heating rate of 190℃/hr and its weight change was measured. The reaction began at 530℃, proceeded rapidly above 630℃ and very slowly above 950℃. The amount of weight gain of the sample agrees with that calculated from the following reaction : UC_2+3/4N_2→1/2U_2N_3+2C. The rate determining the step was considered to be a surface reaction of the powder. The reaction rate was measured for the initial reaction in the temperature range from 590℃ to 660℃, and the activation energy calculated by Arrhenius formula was about 27 kcal/mol.
東北大学の論文
1966-12-20