The Isothermal Section Of The Ho-Mn-Ti Ternary System At 773K

Phase relations in the Ho-Mn-Ti ternary system at 773K have been investigated mainly by X-ray powder diffraction with the aid of differential thermal analysis in this work. The existence of eight binary compounds HoMn₂, Ho₆Mn₂₃, HoMn₁₂, Mn₅Ti, Mn₂Ti,βMn_Ti,αMnTi and Mn₁₅Ti₈₅ has been confirmed in this system. At 773K, the maximum solid solubility of Ti in Mn is about 8at%Ti. The homogeneity range of Mn₂Ti extends from about 61at% to 69at% Mn. The maximum solid solubility of Ho in Mn₂Ti phase is about less than 1at.% Ho. The existence of solid solubility of other phases was observed. No ternary compounds were found in this ternary system. At 773 K, the isothermal section of phase diagram consists of eleven single-phase regions, nineteen two-phase regions and ten three-phase regions.