Phase separation in ternary system of Ni3MnxAl1−x alloys

The concentration dependence of the resistance of the alloys of Ni3MnxAl1−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 Ni3Al and x=0.7 for the phase of the Ni3Mn type. This makes it possible to suppose that in the ternary Ni3MnxAl1−x alloys in the intermediate region of concentrations there is realized an inhomogeneous heterophase structure.