P – T – X diagram of the Co – Mg system

Up to now Co – Mg alloys have not been studied in detail. The information available in the literature refers to the study of changes in the Co – Mg system in the composition-temperature coordinates. However, this does not take into account the significant difference in vapor pressure values of Mg and Co in the alloy, which significantly reduces the accuracy of the results obtained. It is proposed to analyze the Co – Mg system in the coordinates composition-temperature-pressure. The following results have been obtained and presented in the article: a detailed description of the Mg – Co system diagram in the pressure-temperature coordinates, the projections of the three-phase equilibrium lines, some isobaric and isothermal sections of the p – T – X state diagram of Mg – Co system, Mg – Co state diagram in coordinates temperature – partial pressure Mg. The results obtained in this work can be successfully used in the development of ternary and more alloys containing cobalt and magnesium.