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

The Phase relationship in the Er-Mn-Ti ternary system at 773K has been investigated by X-ray powder diffraction with the aid of differential thermal analysis(DTA)and optical microanalysis techniques in this work.The eight binary compounds Mn₁₅Ti₈₅,αMnTi,βMnTi,Mn₂Ti,Mn₅Ti,ErMn₁₂,Er₆Mn₂₃and ErMn₂ have 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 Er in Mn₂Ti phase is about less than 1at.%Er.No ternary compounds were found in this ternary system.The isothermal section of phase diagram consists of eleven single-phase regions,nineteen two-phase regions and nine three-phase regions.The eleven single-phase regions are:α(Er),β(Ti),γ(Mn₁₅Ti₈₅),δ(αMnTi),ε(βMnTi),ζ(Mn₂Ti),η(Mn₅Ti),θ(Mn),ι(ErMn₁₂),κ(Er₆Mn₂₃), andλ(ErMn₂).The nineteen two-phase regions are:α+β,β+γ,γ+δ,δ+ε,ε+ζ,ζ+η,η+θ,θ+ι,ι+κ,κ+λ,λ+α,α+γ,α+δ,α+ε,α+ζ,ζ+λ,ζ+κ,η+κandθ+κ.The nine three-phase regions are:α+β+γ,α+γ+δ,α+δ+ε,α+ε+ζ,α+ζ+λ,ζ+κ+λ,ζ+η+κ,η+θ+κandθ+ι+κ.