Isothermal section of Nd-Zr-Si ternary system at 773 K

Phase diagram is an important basis for materials research and materials application. The phase relations of the Nd-Zr-Si ternary system at 773 K were investigated by X-ray powder diffraction analysis, metallographic analysis and scanning electron microscopy with energy dispersive analysis. The isothermal section of the phase diagram of the Nd-Zr-Si ternary system at 773 K was determined. The isothermal section of the system consisted of 13 single-phase regions, 23 two-phase regions and 11 three-phase regions. The homogeneity range of α-NdSix was from 63 at.% to 66 at.% Si (with x=1.70–1.94). The maximum solid solubilities of Nd in Zr-Si binary compounds and Zr in the Nd-Si binary compounds were observed less than 1 at.% at 773 K.