Phase relationships in the Ho–Mn–Ti ternary system at 773K

The isothermal section of phase diagram of the Ho–Mn–Ti ternary system at 773 K has been investigated mainly by X-ray powder diffraction analysis with the aid of differential thermal analysis in this work. The existence of eight binary compounds HoMn 2 , Ho 6 Mn 23 , HoMn 12 , Mn 5 Ti, Mn 2 Ti, βMnTi, αMnTi and Mn 15 Ti 85 has been confirmed in this system. At 773 K, the maximum solid solubility of Ti in αMn is about 8 at.%Ti. The homogeneity range of Mn 2 Ti extends from about 31 at.% to 39 at.% Ti. The maximum solid solubility of Ho in Mn 2 Ti phase is about less than 1 at.% Ho. The existence of solid solubility of other phases was not observed. No ternary compounds were found in this ternary system. At 773 K, the isothermal section of phase diagram of Ho–Mn–Ti ternary system consists of 11 single-phase regions, 19 two-phase regions and 9 three-phase regions.