450?°C Isothermal Section of the Al-V-Zn System

The 450?°C isothermal section of Al-V-Zn ternary system has been determined experimentally by means of optical microscopy, scanning electron microscopy coupled with energy-dispersive spectrometric, and x-ray diffraction. A new ternary compound named T, containing 8.2-9.9?at.% V, 12.1-27.4?at.% Zn, is positively identified for the first time in this study. The T phase only equilibrates with Al₃V, ??-Al, and L-Zn. Experimental results indicates that the maximal solubility of Al in VZn₃ is 25.2?at.%. The maximum solubility of Zn in ??-V is 5.7?at.%. The Zn solubility in Al-V compounds (Al₈V₅, Al₃V, Al₂₃V₄, Al₄₅V₇, and Al₂₁V₂) is 10.6, 9.2, 1.2, 0.6, and 0.4?at.%, respectively. The maximum solubility of Al in V is 41.0?at.%. Nine three-phase regions have been confirmed experimentally in this ternary system.