The self-diffusion of 59Fe was studied, at temperatures ranging from 850 to 1250C, by using a modified Gruzin residual activity method. It was found that the self-diffusion coefficients (table 67) satisfied an Arrhenius relationship, and were a function of the Mn content. The pre-exponential factor and the activation energy depended linearly upon the Mn concentration (table 68).
B.Million, J.Ruzicková, J.Kucera: Zeitschrift für Metallkunde, 1993, 84[10], 687-9
Table 67
Self-Diffusion of 59Fe in Fe-Mn Alloys
Temperature (K) | Mn (at%) | D (cm2/s) |
1250 | 0.4 | 7.90 x 10-11 |
1250 | 2.9 | 1.13 x 10-10 |
1250 | 8.1 | 9.45 x 10-11 |
1200 | 0.4 | 5.97 x 10-11 |
1200 | 2.9 | 4.60 x 10-11 |
1200 | 8.1 | 5.72 x 10-11 |
1150 | 0.4 | 2.48 x 10-11 |
1150 | 2.9 | 2.44 x 10-11 |
1150 | 8.1 | 3.20 x 10-11 |
1150 | 19.0 | 5.83 x 10-11 |
1150 | 27.8 | 1.42 x 10-10 |
1100 | 0.4 | 8.95 x 10-12 |
1100 | 2.9 | 8.54 x 10-12 |
1100 | 19.0 | 2.92 x 10-11 |
1100 | 27.8 | 6.07 x 10-11 |
1100 | 37.7 | 8.59 x 10-11 |
1100 | 48.8 | 5.75 x 10-11 |
1050 | 0.4 | 3.54 x 10-12 |
1050 | 2.9 | 3.56 x 10-12 |
1050 | 8.1 | 5.37 x 10-12 |
1050 | 19.0 | 1.21 x 10-11 |
1050 | 27.8 | 2.88 x 10-11 |
1050 | 37.7 | 3.88 x 10-11 |
1050 | 48.8 | 4.56 x 10-11 |
1000 | 0.4 | 1.60 x 10-12 |
1000 | 2.9 | 2.57 x 10-12 |
1000 | 8.1 | 1.74 x 10-12 |
1000 | 19.0 | 5.57 x 10-12 |
1000 | 27.8 | 1.60 x 10-11 |
1000 | 37.7 | 1.77 x 10-11 |
1000 | 48.8 | 1.72 x 10-11 |
950 | 19.0 | 2.41 x 10-12 |
950 | 27.8 | 6.49 x 10-12 |
950 | 37.7 | 6.09 x 10-12 |
950 | 48.8 | 3.98 x 10-12 |
900 | 27.8 | 1.63 x 10-12 |
900 | 37.7 | 3.37 x 10-12 |
900 | 48.8 | 2.54 x 10-12 |
850 | 37.7 | 1.24 x 10-12 |
850 | 48.8 | 1.56 x 10-12 |
Table 68
Self-Diffusion Parameters for 59Fe in Fe-Mn Alloys
Mn (at%) | ln[Do (cm2/s)] | Q (kJ/mol) |
0.4 | -1.897 | 267.8 |
2.9 | -3.069 | 253.3 |
8.1 | -2.263 | 261.8 |
19.0 | -3.958 | 232.1 |
27.8 | -2.761 | 235.7 |
37.7 | -4.300 | 216.4 |
48.8 | -5.478 | 205.6 |