The isothermal section of the Er–Mn–Ni ternary system at 803 K

The isothermal section of the phase diagram of the Er–Mn–Ni ternary system at 803K was investigated by X-ray powder diffraction with the aid of microanalysis and electron probe microanalysis 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, Er2Ni17, ErNi5, Er2Ni7, ErNi3, and ErNi2 is about 31, 13, 8, 4, 3, and 2at.% Mn, respectively. The maximum solid solubility of Ni in Mn, ErMn12, and Er6Mn23 is about 3at.% Ni, for all three compounds. 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.