Phase separation in ternary system of Ni3MnxAl1−x alloys

Abstract The concentration dependence of the resistance of the alloys of Ni 3 Mn x Al 1− x system is described in the framework of the percolation theory in the model of an effective medium. The regions corresponding to the alloys of terminal compositions are present in the entire volume of the samples. The formation of an infinite cluster occurs near the percolation threshold x =0.3 for the phase of the Ni 3 Al and x =0.7 for the phase of the Ni 3 Mn type. This makes it possible to suppose that in the ternary Ni 3 Mn x Al 1− x alloys in the intermediate region of concentrations there is realized an inhomogeneous heterophase structure.