The tracer diffusivities of various impurity atoms in the metallic glass were measured, at 604 and 690K, by using secondary ion mass spectrometry. It was found that B atoms diffused some 2 orders of magnitude faster than Si atoms. The diffusivities of Be and Fe were intermediate, so that the overall trend in the coefficients was in the decreasing order: B – Be – Fe - Si. (table 305). This order was precisely opposite to the trend in the atomic radii of the diffusing species.
S.K.Sharma, M.P.Macht, V.Naundorf: Physical Review B, 1992, 46[5], 3147-50
Table 301
Chemical Diffusion Coefficients for the Ti-Mo System
Ti (at%) | Temperature (K) | D (m2/s) |
10 | 1199 | 2.3 x 10-14 |
20 | 1199 | 2.5 x 10-14 |
30 | 1199 | 3.7 x 10-14 |
continued
Table 301 (continued)
Chemical Diffusion Coefficients for the Ti-Mo System
Ti (at%) | Temperature (K) | D (m2/s) |
10 | 1199 | 2.3 x 10-14 |
20 | 1199 | 2.5 x 10-14 |
30 | 1199 | 3.7 x 10-14 |
40 | 1199 | 4.0 x 10-14 |
50 | 1199 | 5.0 x 10-14 |
60 | 1199 | 6.4 x 10-14 |
70 | 1199 | 8.9 x 10-14 |
80 | 1199 | 1.7 x 10-13 |
90 | 1199 | 2.1 x 10-13 |
10 | 1217 | 3.2 x 10-14 |
20 | 1217 | 4.2 x 10-14 |
30 | 1217 | 4.3 x 10-14 |
40 | 1217 | 4.7 x 10-14 |
50 | 1217 | 6.0 x 10-14 |
60 | 1217 | 7.5 x 10-14 |
70 | 1217 | 1.03 x 10-13 |
80 | 1217 | 1.82 x 10-13 |
90 | 1217 | 2.42 x 10-13 |
10 | 1330 | 1.30 x 10-13 |
20 | 1330 | 1.90 x 10-13 |
30 | 1330 | 2.00 x 10-13 |
40 | 1330 | 2.30 x 10-13 |
50 | 1330 | 2.90 x 10-13 |
60 | 1330 | 3.60 x 10-13 |
70 | 1330 | 4.50 x 10-13 |
80 | 1330 | 7.00 x 10-13 |
90 | 1330 | 9.20 x 10-13 |
10 | 1364 | 2.20 x 10-13 |
20 | 1364 | 2.20 x 10-13 |
30 | 1364 | 2.30 x 10-13 |
continued
Table 301 (continued)
Chemical Diffusion Coefficients for the Ti-Mo System
Ti (at%) | Temperature (K) | D (m2/s) |
40 | 1364 | 3.00 x 10-13 |
50 | 1364 | 4.30 x 10-13 |
60 | 1364 | 5.00 x 10-13 |
70 | 1364 | 6.20 x 10-13 |
80 | 1364 | 9.60 x 10-13 |
90 | 1364 | 1.22 x 10-12 |
10 | 1479 | 8.00 x 10-13 |
20 | 1479 | 1.10 x 10-12 |
30 | 1479 | 1.20 x 10-12 |
40 | 1479 | 1.30 x 10-12 |
50 | 1479 | 1.50 x 10-12 |
60 | 1479 | 1.80 x 10-12 |
70 | 1479 | 2.10 x 10-12 |
80 | 1479 | 2.70 x 10-12 |
90 | 1479 | 3.70 x 10-12 |
10 | 1518 | 1.70 x 10-12 |
20 | 1518 | 2.00 x 10-12 |
30 | 1518 | 2.05 x 10-12 |
40 | 1518 | 2.10 x 10-12 |
50 | 1518 | 2.20 x 10-12 |
60 | 1518 | 2.80 x 10-12 |
70 | 1518 | 3.30 x 10-12 |
80 | 1518 | 3.90 x 10-12 |
90 | 1518 | 5.50 x 10-12 |