The migration of Cu in amorphous samples was measured, at 573 to 645K, by using secondary ion mass spectrometry. The experiments were performed on pre-relaxed specimens, and the diffusion coefficients were found to be between 3.0 x 10-24 and 9.0 x 10-21m2/s. The temperature dependence of the diffusivity was of Arrhenius type, and the data (table 150) could be described by:
D (m2/s) = 1.3 x 101exp[-2.73(eV/atom)/kT]
The results suggested the possible existence of a size-dependence of the diffusivity.
S.K.Sharma, M.P.Macht, V.Naundorf: Physica Status Solidi A, 1991, 126[1], 101-8
Table 151
Diffusivity of Fe in Fe40Ni40B20
Pre-Annealing (K, h) | Temperature (K) | Diffusivity (m2/s) |
- | 533 | 3.60 x 10-24 |
- | 553 | 1.25 x 10-23 |
- | 571 | 4.09 x 10-23 |
573, 96 | 571 | 3.07 x 10-23 |
613, 4 | 571 | 3.02 x 10-23 |
633, 0.67 | 571 | 3.09 x 10-23 |
- | 593 | 5.95 x 10-22 |
593, 15 | 593 | 3.92 x 10-22 |
593, 30 | 593 | 3.87 x 10-22 |
593, 45 | 593 | 3.82 x 10-22 |
593, 60 | 593 | 3.47 x 10-22 |
593, 75 | 595 | 3.37 x 10-22 |
573, 96 | 593 | 3.48 x 10-22 |
613, 4 | 593 | 3.30 x 10-22 |
633, 0.67 | 593 | 3.34 x 10-22 |
- | 613 | 3.33 x 10-21 |
613, 4 | 613 | 1.40 x 10-21 |
613, 8 | 613 | 1.51 x 10-21 |
613, 12 | 613 | 1.43 x 10-21 |
continued
Table 151 (continued)
Diffusivity of Fe in Fe40Ni40B20
Pre-Annealing (K, h) | Temperature (K) | Diffusivity (m2/s) |
613, 16 | 613 | 1.55 x 10-21 |
613, 20 | 613 | 1.41 x 10-21 |
613, 24 | 613 | 1.40 x 10-21 |
573, 96 | 631 | 5.01 x 10-21 |
613, 4 | 631 | 4.71 x 10-21 |
633, 0.67 | 631 | 4.90 x 10-21 |
- | 633 | 3.77 x 10-21 |
613, 4 | 633 | 2.61 x 10-21 |
- | 643 | 1.05 x 10-20 |
613, 4 | 643 | 1.01 x 10-20 |
633, 0.67 | 643 | 1.03 x 10-20 |