Phase equilibria of Ni-Al-Pd and Ni-Cr-Pd ternary systems and Ni-Al-Cr-Pd quaternary system at 1423 K

In this work, the isothermal sections of the Ni-Al-Pd and Ni-Cr-Pd ternary and the Ni-Al-Cr-Pd quaternary systems at 1423 K, with Ni fixed at 53 at.%, were experimentally determined by scanning electron microscopy, coupled with energy dispersive spectroscopy and X-ray diffraction. Three three-phase regions were confirmed and one three-phase region was deduced in the isothermal section of the Ni-Al-Pd system at 1423 K. No three-phase regions existed in the isothermal section of the Ni-Cr-Pd system at 1423 K. Three three-phase regions were determined in the 1423 K isothermal section of the Ni-Al-Cr-Pd quaternary, with Ni fixed at 53 at.%, and two four-phase regions were deduced.