On the Formation of UC1-x Nx

Abstract
From the known values of the free energy of formation of several uranium compounds in the ternary system U-C-N, the condition of stable existence of the solid solution between UC and UN, UC1-x-Nx, was determined, and several ternary sections were obtained at constant temperature and constant nitrogen pressure. In order to examine these results, some experiments were carried out under several different conditions of temperature and nitrogen pressure. From these results, it is concluded that the stable compounds which exist in the ternary system U-C-N change from larger to smaller value of (log PN2)/T in the following order:

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