Determination of the phase equilibria in the Al–Er–V ternary system at 773 K

The phase equilibria of the Al–Er–V ternary system at 773 K has been investigated over the whole concentration range mainly by powder X-ray diffraction (XRD), scanning electron microscope (SEM) and optical microscopy (OM). This isothermal section consists of 14 single-phase regions, 26 two-phase regions, and 13 three-phase regions. There are 10 binary compounds, i.e. Al3Er, Al2Er, AlEr, Al2Er3, AlEr2, Al10V, Al45V7, Al23V4, Al3V and Al8V5 confirmed in the Al–Er–V system. The ternary compound Al43Er6V4 is confirmed and its lattice parameter is calculated and refined. The solid solubility of V in Al2Er3, AlEr and Al2Er are determined to be about 1–2 at.%, and the solubility of Al in V is 39 at.% at 773 K.