Table 1 The deduced values of the characteristic temperatures (M s and T min ), transformation width (ΔT) of the B2 → R transition, the Fermi energy (E F ), and the enthalpy change (ΔH) during the martensitic transformation for the Ti50Ni50-x Fe x (x = 2.0–10.0) and Ti49Ni45Fe6 samples.
Sample | M s and T min (K) from the ρ(T) | ΔT (K) of the B2 → R transition from the ρ(T) | M s (K) from the S(T) | E F (eV) | ΔS (J/mole K) | ΔH (J/g) |
---|---|---|---|---|---|---|
Ti50Ni48Fe2 | 293.1 | 25.1 | 288.2 | 2.4 | 1.31 | 18.1 |
Ti50Ni47Fe3 | 285.5 | 27.2 | 280.4 | 3.9 | 1.37 | 17.3 |
Ti50Ni46Fe4 | 250.9 | 76.3 | 236.8 | 1.9 | 1.35 | 6.1 |
Ti50Ni44.5Fe5.5 | 225.6 | 77.9 | 205.0 | 2.2 | 1.28 | 3.6 |
Ti50Ni44Fe6 | 209.1 | 108.4 | 176.3 | 2.3 | 0.32 | 1.6 |
Ti49Ni45Fe6 | 123.5 | — | — | 2.4 | — | — |
Ti50Ni42Fe8 | 185.7 | — | — | 2.7 | — | — |
Ti50Ni40Fe10 | 142.0 | — | — | 3.2 | — | — |