Experimental phase diagram of the V–Si–Ho ternary system

Abstract The phase equilibria of the V–Si–Ho ternary system at 973 K were experimentally investigated by using X-ray powder diffraction and backscattered electron imaging with energy dispersive X-ray analysis. The existence of nine binary compounds, namely, V 5 Si 3 , V 6 Si 5 , VSi 2 , V 3 Si, HoSi 2− b , HoSi 2− a , HoSi, Ho 5 Si 3 and Ho 5 Si 4 was confirmed. The phases of HoSi (FeB) and Ho 4 Si 5 were not found at 973 K. No binary compound was found in the V–Ho binary system. No ternary compound was found at 973 K in this system. The homogeneity range of V 3 Si was determined to be from 22 at.% to 25 at.% Si. The maximum solid solubility of Si in V is about 4 at.%.