p–T–x State Diagram of the Co–Mg System

Abstract

Co–Mg alloys have not been studied in sufficient detail. Information available in the literature relates to the study of changes in the Co–Mg system in composition–temperature coordinates. However, this does not take into account the significant difference in the 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. A detailed description of the state diagram of the system in pressure–temperature coordinates is given, projections of three-phase equilibrium lines are determined, individual isobaric and isothermal sections of the spatial p–T–x state diagram of the Mg–Co system are constructed, and the state diagram of the Co–Mg system in temperature–partial pressure of Mg coordinates is presented. The results obtained can be successfully used in the development of ternary and more alloys containing cobalt and magnesium.