The Isothermal Section Of The Er-Mn-Ni Ternary System At 803K

The isothermal section of the phase diagram of the Er-Mn-Ni ternary system at 803K has been investigated by X-ray powder diffraction with the aid of DTA and OM techniques. It consists of 14 single-phase regions, 24 two-phase regions and 11 three-phase regions. At 803K, the maximum solid solubility of Mn in Ni, Er2Nin, ErNi5, Er2Ni7, ErNi3 and ErNi2 are about 31, 13,8,4,3 and 2at% Mn, respectively. The maximum solid solubility of Ni in Mn, ErMnn and Er6Mn23 are about 3, 3 and 3at% Ni, respectively. The existence of ErNi4, Er4Ni17 and Er5Ni22 has not been confirmed. The existence of any ternary compound of the Er-Mn-Ni was not observed.