Isothermal Section of the Ti-Ta-Sn Ternary System at 1173 K

Thermodynamic Assessment of Bio-Oriented Ti-Ta-Sn System

“…Due to small solid solubility or limited experimental verification, ternary solid solubility only considering the substitution between Ti and Ta was employed to describe intermetallic compounds, except Ti 3 Sn and Ti 2 Sn. Table 3 shows the calculated solubilities of the third element in binary compounds compared with experimental data [16,17]. As can be seen, the experimentally determined results can be well reproduced by the present calculations with the consideration of experiment errors.…”

“…According to the experimental data, the ternary compound, Ti36Ta28Sn36, is stable at 1173 K, while disappears at 973 K. As can be seen, the thermal stabilities of Ti36Ta28Sn36 can be well reproduced by using the present thermodynamic modeling. A total of four two-phase regions and three three-phase regions at 973 K, and five twophase regions and two three-phase regions at 1173 K have been experimentally detected by Wang et al [16,17], signed by vacant symbols for two-phase regions and solid symbols for three-phase regions in Figures 2 and 3. As can be seen in Figures 2 and 3, all the three-phase regions and most of the two-phase regions can be well reproduced based on the present thermodynamic modeling.…”

“…Crystal structure data of phases in the ternary system. Ni 2 In hP6 P6 3 /mmc Ti 5 Sn 3 Ti 5 Sn 3 Mn 5 Si 3 hP16 P6 3 /mcm Ti 6 Sn 5 Ti 6 Sn 5 Ti 6 Sn 5 oI44 Immm Ti 2 Sn 3 Ti 2 Sn 3 -oC40 Cmca Ta 3 Sn Ta 3 Sn Cr 3 Si cP8 Pm3n Ta 2 Sn 3 Ta 2 Sn 3 CuMg 2 oF48 Fddd The literature information for the sub-binary systems have been critically reviewed in previous works [12][13][14][15][16][17], which will not be repeated here. The recent evaluations of the Ti-Ta [12], Ti-Sn [13] and Ta-Sn [14] binary systems are considered to be reliable and adopted in the present assessment of the Ti-Ta-Sn ternary system.…”

“…However, they only determined its composition using EPMA without further studying its crystal structure. Additionally, the solubility of the third element in boundary compounds were experimentally determined by means of EPMA technique [16,17]. The solubilities of Ta were determined to be 8.3 at.% at 973 K and 9.3 at.% at 1173 K in Ti 3 Sn, no less than 8.8 at.% at 973 K and no less than…”

“…GHSERXX (XX = SN, TA and TI) are the reference state of Gibbs energies. Figures 2 and 3 show the calculated isothermal sections of the Ti-Ta-Sn system at 973 and 1173 K compared with experimental information [16,17], respectively. The chemical compositions of the annealed alloys together with the corresponding equilibrium phases are displayed in the figures.…”