Tracer diffusion coefficients of 59Fe and 99Mo in high-purity alloys containing up to 1.8at%Mo were determined at 823 to 1173K (tables 1 and 2) by using a serial sputter-microsectioning technique. The diffusion coefficient of Fe (solvent) increased with increasing Mo content, whereas the diffusion coefficient of Mo (solute) decreased. The influence of magnetic transformation on the diffusion of Fe in the Fe–Mo alloys decreased with increasing Mo content, while that on the diffusion of Mo in the alloys was a maximum at about 0.8at%Mo. Analysis of jump frequency ratios showed that a vacancy was weakly bound by a Mo atom.
Self-Diffusion in Iron-Based Fe–Mo Alloys. H.Nitta, K.Miura, Y.Iijima: Acta Materialia, 2006, 54[10], 2833-47
Table 1
Diffusion of Fe in Fe-Mo Alloys
Mo (at%) | Temperature (K) | D (m2/s) |
0.4 | 823 | 9.49 x 10-22 |
0.4 | 823 | 2.20 x 10-21 |
0.4 | 873 | 1.38 x 10-20 |
0.4 | 873 | 2.12 x 10-20 |
0.4 | 898 | 7.61 x 10-20 |
0.4 | 923 | 2.45 x 10-19 |
0.4 | 923 | 3.36 x 10-19 |
0.4 | 953 | 9.73 x 10-19 |
0.4 | 973 | 3.64 x 10-18 |
0.4 | 973 | 2.98 x 10-18 |
0.4 | 993 | 8.08 x 10-18 |
0.4 | 1023 | 2.65 x 10-17 |
0.4 | 1023 | 3.42 x 10-17 |
0.4 | 1038 | 4.81 x 10-17 |
0.4 | 1052 | 1.73 x 10-16 |
0.4 | 1053 | 1.22 x 10-16 |
0.4 | 1073 | 1.96 x 10-16 |
0.4 | 1073 | 3.00 x 10-16 |
0.4 | 1088 | 3.56 x 10-16 |
0.4 | 1103 | 6.90 x 10-16 |
0.4 | 1123 | 7.78 x 10-16 |
0.4 | 1123 | 1.02 x 10-15 |
0.4 | 1138 | 1.55 x 10-15 |
0.4 | 1143 | 1.23 x 10-15 |
0.4 | 1173 | 2.40 x 10-15 |
continued
Table 1 (continued)
Diffusion of Fe in Fe-Mo Alloys
Mo (at%) | Temperature (K) | D (m2/s) |
0.4 | 1173 | 3.44 x 10-15 |
0.7 | 823 | 1.67 x 10-21 |
0.7 | 848 | 7.33 x 10-21 |
0.7 | 873 | 2.12 x 10-20 |
0.7 | 923 | 3.10 x 10-19 |
0.7 | 953 | 1.56 x 10-18 |
0.7 | 973 | 4.20 x 10-18 |
0.7 | 993 | 1.04 x 10-17 |
0.7 | 1023 | 3.38 x 10-17 |
0.7 | 1033 | 8.23 x 10-17 |
0.7 | 1053 | 1.54 x 10-16 |
0.7 | 1073 | 2.65 x 10-16 |
0.7 | 1103 | 5.12 x 10-16 |
0.7 | 1123 | 8.02 x 10-16 |
0.7 | 1143 | 1.53 x 10-15 |
0.7 | 1173 | 3.10 x 10-15 |
1.0 | 823 | 1.95 x 10-21 |
1.0 | 873 | 2.33 x 10-20 |
1.0 | 903 | 1.87 x 10-19 |
1.0 | 956 | 1.59 x 10-18 |
1.0 | 973 | 3.62 x 10-18 |
1.0 | 1023 | 4.40 x 10-17 |
1.0 | 1035 | 7.95 x 10-17 |
1.0 | 1073 | 3.62 x 10-16 |
1.0 | 1085 | 4.68 x 10-16 |
1.0 | 1103 | 6.50 x 10-16 |
1.0 | 1123 | 1.12 x 10-15 |
1.0 | 1143 | 2.10 x 10-15 |
1.0 | 1168 | 3.25 x 10-15 |
1.5 | 823 | 1.19 x 10-21 |
continued
Table 1 (continued)
Diffusion of Fe in Fe-Mo Alloys
Mo (at%) | Temperature (K) | D (m2/s) |
1.5 | 858 | 1.22 x 10-20 |
1.5 | 873 | 1.92 x 10-20 |
1.5 | 903 | 1.07 x 10-19 |
1.5 | 923 | 2.22 x 10-19 |
1.5 | 953 | 1.15 x 10-18 |
1.5 | 993 | 8.56 x 10-18 |
1.5 | 1023 | 3.70 x 10-17 |
1.5 | 1033 | 6.05 x 10-17 |
1.5 | 1053 | 1.61 x 10-16 |
1.5 | 1063 | 1.90 x 10-16 |
1.5 | 1073 | 2.56 x 10-16 |
1.5 | 1088 | 3.78 x 10-16 |
1.5 | 1103 | 6.48 x 10-16 |
1.5 | 1113 | 7.92 x 10-16 |
1.5 | 1120 | 9.16 x 10-16 |
1.5 | 1153 | 2.03 x 10-15 |
1.5 | 1173 | 2.70 x 10-15 |
1.8 | 848 | 9.12 x 10-21 |
1.8 | 873 | 2.82 x 10-20 |
1.8 | 903 | 1.81 x 10-19 |
1.8 | 956 | 1.50 x 10-18 |
1.8 | 973 | 4.49 x 10-18 |
1.8 | 993 | 1.35 x 10-17 |
1.8 | 1023 | 5.90 x 10-17 |
1.8 | 1033 | 8.69 x 10-17 |
1.8 | 1051 | 2.09 x 10-16 |
1.8 | 1063 | 2.77 x 10-16 |
1.8 | 1071 | 3.62 x 10-16 |
1.8 | 1086 | 6.09 x 10-16 |
1.8 | 1103 | 9.15 x 10-16 |
continued
Table 1 (continued)
Diffusion of Fe in Fe-Mo Alloys
Mo (at%) | Temperature (K) | D (m2/s) |
1.8 | 1112 | 1.18 x 10-15 |
1.8 | 1153 | 2.58 x 10-15 |
1.8 | 1173 | 5.32 x 10-15 |
Table 2
Diffusion of Mo in Fe-Mo Alloys
Mo (at%) | Temperature (K) | D (m2/s) |
0.4 | 834 | 2.79 x 10-21 |
0.4 | 843 | 4.75 x 10-21 |
0.4 | 853 | 1.21 x 10-20 |
0.4 | 863 | 1.26 x 10-20 |
0.4 | 873 | 2.07 x 10-20 |
0.4 | 887 | 3.93 x 10-20 |
0.4 | 903 | 1.31 x 10-19 |
0.4 | 903 | 2.86 x 10-19 |
0.4 | 923 | 3.13 x 10-19 |
0.4 | 923 | 4.26 x 10-19 |
0.4 | 953 | 1.43 x 10-18 |
0.4 | 963 | 2.23 x 10-18 |
0.4 | 973 | 3.43 x 10-18 |
0.4 | 983 | 5.50 x 10-18 |
0.4 | 1003 | 1.22 x 10-17 |
0.4 | 1023 | 3.05 x 10-17 |
0.4 | 1033 | 9.73 x 10-17 |
0.4 | 1034 | 6.69 x 10-17 |
0.4 | 1044 | 1.07 x 10-16 |
0.4 | 1053 | 1.49 x 10-16 |
0.4 | 1053 | 2.21 x 10-16 |
0.4 | 1063 | 1.99 x 10-16 |
continued
Table 2 (continued)
Diffusion of Mo in Fe-Mo Alloys
Mo (at%) | Temperature (K) | D (m2/s) |
0.4 | 1073 | 2.65 x 10-16 |
0.4 | 1073 | 4.32 x 10-16 |
0.4 | 1089 | 4.52 x 10-16 |
0.4 | 1093 | 7.64 x 10-16 |
0.4 | 1104 | 6.62 x 10-16 |
0.4 | 1113 | 1.29 x 10-15 |
0.4 | 1123 | 1.14 x 10-15 |
0.4 | 1133 | 2.01 x 10-15 |
0.4 | 1143 | 1.80 x 10-15 |
0.4 | 1155 | 4.42 x 10-15 |
0.7 | 833 | 2.50 x 10-21 |
0.7 | 873 | 4.63 x 10-20 |
0.7 | 923 | 3.60 x 10-19 |
0.7 | 973 | 4.73 x 10-18 |
0.7 | 1003 | 1.87 x 10-17 |
0.7 | 1033 | 8.41 x 10-17 |
0.7 | 1043 | 1.50 x 10-16 |
0.7 | 1053 | 1.59 x 10-16 |
0.7 | 1073 | 3.71 x 10-16 |
0.7 | 1093 | 8.03 x 10-16 |
0.7 | 1113 | 1.23 x 10-15 |
0.7 | 1133 | 2.54 x 10-15 |
0.7 | 1153 | 2.82 x 10-15 |
1.0 | 833 | 3.71 x 10-21 |
1.0 | 853 | 1.08 x 10-20 |
1.0 | 873 | 3.60 x 10-20 |
1.0 | 903 | 1.77 x 10-19 |
1.0 | 913 | 2.82 x 10-19 |
1.0 | 923 | 4.77 x 10-19 |
1.0 | 953 | 2.06 x 10-18 |
continued
Table 2 (continued)
Diffusion of Mo in Fe-Mo Alloys
Mo (at%) | Temperature (K) | D (m2/s) |
1.0 | 995 | 1.63 x 10-17 |
1.0 | 1012 | 2.73 x 10-17 |
1.0 | 1023 | 5.72 x 10-17 |
1.0 | 1034 | 1.05 x 10-16 |
1.0 | 1053 | 2.02 x 10-16 |
1.0 | 1063 | 3.26 x 10-16 |
1.0 | 1073 | 4.55 x 10-16 |
1.0 | 1086 | 6.02 x 10-16 |
1.0 | 1103 | 1.05 x 10-15 |
1.0 | 1111 | 1.27 x 10-15 |
1.0 | 1123 | 1.67 x 10-15 |
1.0 | 1143 | 3.07 x 10-15 |
1.5 | 838 | 3.62 x 10-21 |
1.5 | 858 | 8.97 x 10-21 |
1.5 | 873 | 1.95 x 10-20 |
1.5 | 903 | 1.02 x 10-19 |
1.5 | 923 | 2.97 x 10-19 |
1.5 | 953 | 1.28 x 10-18 |
1.5 | 970 | 2.81 x 10-18 |
1.5 | 984 | 4.60 x 10-18 |
1.5 | 1004 | 1.09 x 10-17 |
1.5 | 1033 | 4.84 x 10-17 |
1.5 | 1040 | 6.52 x 10-17 |
1.5 | 1053 | 1.13 x 10-16 |
1.5 | 1063 | 1.48 x 10-16 |
1.5 | 1073 | 2.19 x 10-16 |
1.5 | 1088 | 2.91 x 10-16 |
1.5 | 1103 | 5.19 x 10-16 |
1.5 | 1120 | 7.34 x 10-16 |
1.8 | 853 | 1.02 x 10-20 |
continued
Table 2 (continued)
Diffusion of Mo in Fe-Mo Alloys
Mo (at%) | Temperature (K) | D (m2/s) |
1.8 | 873 | 3.04 x 10-20 |
1.8 | 923 | 3.85 x 10-19 |
1.8 | 973 | 3.70 x 10-18 |
1.8 | 1033 | 6.18 x 10-17 |
1.8 | 1043 | 1.21 x 10-16 |
1.8 | 1073 | 2.62 x 10-16 |
1.8 | 1093 | 4.20 x 10-16 |
1.8 | 1113 | 7.74 x 10-16 |
1.8 | 1133 | 1.64 x 10-15 |
1.8 | 1155 | 2.87 x 10-15 |