Phase equilibria in the Co-Cr-Ni system

The 800°C isothermal section of the Co-Cr-Ni system was plotted using a set of physicochemical methods. The section is characterized by an extensive field of a cobalt-and nickel-based γ solid solution. The homogeneity region of the σ phase is as large as 18 at % Ni and is directed to Ni₄₀Cr₆₀. The penetration depth of the hcp ? phase does not exceed 10 at % Ni.