Tracer diffusion measurements were performed, in vacuum and under high hydrostatic pressures, using amorphous samples. A marked structural relaxation effect was observed for both solutes, and led to a decrease in the diffusivity with annealing time. The relaxation time was nearly the same in both cases. For well-relaxed samples, the results could be described by:
Au: D (m2/s) = 1.9 x 10-9 exp[-1.65(eV)/kT]
Hf: D (m2/s) = 2.8 x 10-9 exp[-1.78(eV)/kT]
The activation volumes were equal to 0.51 and 0.52 atomic volumes, respectively.
Y.Loirat, J.L.Bocquet, Y.Limoge: Journal of Non-Crystalline Solids, 2000, 265[3], 252-Table 211
Diffusion Coefficients of 63Ni in Ni-Sn Compounds
Compound | Temperature (K) | Orientation* | D (cm2/s) |
Ni61Sn39 | 928 | | 1.36 x 10-12 |
Ni61Sn39 | 928 | | 7.62 x 10-13 |
Ni62Sn38 | 928 | | 9.52 x 10-13 |
Ni62Sn38 | 928 | | 6.95 x 10-13 |
Ni62Sn38 | 974 | | 4.33 x 10-12 |
Ni62Sn38 | 974 | | 2.87 x 10-12 |
Ni61Sn39 | 978 | | 4.74 x 10-12 |
Ni61Sn39 | 978 | | 3.11 x 10-12 |
Ni61Sn39 | 1051 | | 2.43 x 10-11 |
Ni61Sn39 | 1051 | | 1.67 x 10-11 |
Ni61Sn39 | 1122 | | 1.15 x 10-10 |
Ni61Sn39 | 1122 | | 8.06 x 10-11 |
Ni62Sn38 | 1123 | | 1.31 x 10-10 |
Ni62Sn38 | 1123 | | 7.41 x 10-11 |
Ni61Sn39 | 1190 | | 3.87 x 10-10 |
Ni61Sn39 | 1190 | | 2.92 x 10-10 |
Ni62Sn38 | 1270 | | 1.43 x 10-9 |
Ni62Sn38 | 1270 | | 1.10 x 10-9 |
Ni61Sn39 | 1274 | | 1.73 x 10-9 |
Ni61Sn39 | 1274 | | 1.37 x 10-9 |
Ni61Sn39 | 1341 | | 4.19 x 10-9 |
Ni61Sn39 | 1341 | | 3.64 x 10-9 |
Ni61Sn39 | 1434 | | 1.65 x 10-8 |
Ni61Sn39 | 1434 | | 1.44 x 10-8 |
Ni62Sn38 | 1442 | | 1.65 x 10-8 |
* with respect to c-axis
continued
Table 211 (continued)
Diffusion Coefficients of 63Ni in Ni-Sn Compounds
Compound | Temperature (K) | Orientation* | D (cm2/s) |
Ni62Sn38 | 1442 | | 1.46 x 10-8 |
Ni61Sn39 | 1472 | | 2.58 x 10-8 |
Ni61Sn39 | 1472 | | 2.31 x 10-8 |
* with respect to c-axis