Abstract
Interaction between impurity elements (in particular, Si, Ni and O) dissolved in copper melt has been investigated experimentally and theoretically. The X-rays microanalysis has been used to investigate reactions products in the melt. Experimental results have allowed to determine conditions of various complex compounds formation. In particular, interaction between Si and Ni in copper melt leading to formation of double compounds (silicides) has been discovered. Phase diagram of Cu2O-NiO system has been calculated. Calculation results are in good agreement with literary data. Activities aCu2O and aNiO have been calculated. The deviation of activity from Raoult law is negative for Cu2O and positive for NiO.
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