Phase Equilibria of the Er-Si-V Ternary System at 1173 K

The phase equilibria of the Er-Si-V ternary system at 1173 K has been investigated mainly by means of powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential thermal analysis (DTA). 8 binary compounds, namely Er5Si3, Er5Si4, ErSi, Er3Si5, Si2V, Si5V6, Si3V5 and SiV3 have been confirmed. No binary compound was found in the Er-V binary system, and no ternary compound has been found in this isothermal section. The maximum solid solubility of Si in V is about 4 at.%. Er3Si5 has a narrow homogeneity range (from 61 to 62.5 at.% Si) while the homogeneity range of SiV3 is from 22 to 25 at.% Si. No remarkable solid solubility of the elements in any of the other phases has been observed. The isothermal section consists of 11 single-phase regions, 19 two-phase regions, and 9 three-phase regions.