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Temperature dependence of free energy of formation of various Ti-Al compounds and their values at process temperatures.
| Compounds | Gibbs free energy of formation (ΔGf) (J/mole) |
(ΔGf) 857 K (J/mole) |
(ΔGf) 884 K (J/mole) |
|---|---|---|---|
| Ti3Al | -29,633 + 6.708T | -23,884.244 | -23703.128 |
| TiAl | -37,445 + 16.793T | -23,053.399 | -22,599.988 |
| Al2Ti | -40,349 + 10.365T | -31,466.195 | -31,186.34 |
| Al3Ti | -43,858 + 11.021T | -34,413.515 | -34,115.436 |
| Al5Ti2 | -40,495 + 9.529T | -32,328.647 | -32,071.364 |
