Isothermal sections of the Al–Pd–Co alloy system for 50–100 at.% Al

Abstract The Al–Pd–Co alloy system was studied in the range of 50 to 100 at.% Al. Isothermal sections at 1050, 1000, 940 and 790 °C were determined. The isostructural AlCo and AlPd phases form a continuous range of solid solutions. The Al–Pd e-phase(s) region extends up to ∼16.1 at.% Co, Al 3 Pd 2 up to 7.1 at.% Co, M-Al 13 Co 4 , Al 5 Co 2 , Al 9 Co 2 and the Al–Co Z-phase exhibit moderate extensions into the ternary compositional range of the phase diagram. Six stable ternary compounds designated W, Y 2 , U, V, F and C 2 were revealed and characterized.