Experimental Investigation of Phase Equilibria in the Cr-Ni-Zr Ternary System

In the literature, knowledge of the phase relations in the Cr-Ni-Zr system is limited. To remedy the situation, the phase equilibria of the Cr-Ni-Zr ternary system at 1273 K were investigated via experimental techniques applied to 13 key ternary alloys. In addition, 7 ternary alloys were prepared to determine the isothermal section at 1373 K in the ZrCr 2 -NiZr-Ni-Cr region. X-ray diffraction analysis (XRD) and electron probe micro-analysis (EPMA) were used for the phase identification and composition measurement, respectively. According to the experimental results, the isothermal sections of the Cr-Ni-Zr system at 1273 and 1373 K were constructed and 3 three-phase regions were identifying in the isothermal section at 1273 K. The phase relations from the present work and the literature are compared and analyzed. The presently obtained phase equilibria in the Cr-Ni-Zr ternary system can provide new phase diagram data for a further thermodynamic optimization, which is expected to provide important information for selecting compositions in the design in Cr-Ni-Zr based alloys.