The diffusion of B at temperatures of between 900 and 1200C was measured by means of particle tracking auto-radiography (tables 69 and 70). It was found that the B diffusivity in -Fe increased as Ni was added.
W.Wang, S.Zhang, X.He: Acta Metallurgica et Materialia, 1995, 43[4], 1693-9
Table 69
Diffusivity of B in Various Alloys
Material | Temperature (C) | D (m2/s) |
04MnNb | 954 | 4.860 x 10-12 |
04MnNb | 1003 | 7.324 x 10-12 |
04MnNb | 1056 | 1.075 x 10-11 |
04MnNb | 1104 | 1.530 x 10-11 |
04MnNb | 1154 | 2.318 x 10-11 |
04MnNb | 1204 | 2.996 x 10-11 |
Fe-30%Ni | 954 | 2.330 x 10-11 |
Fe-30%Ni | 1003 | 3.732 x 10-11 |
Fe-30%Ni | 1056 | 5.859 x 10-11 |
Fe-30%Ni | 1104 | 7.898 x 10-11 |
Fe-30%Ni | 1154 | 1.172 x 10-10 |
Fe-30%Ni | 1204 | 1.597 x 10-10 |
Ni | 950 | 5.021 x 10-11 |
Ni | 1003 | 7.592 x 10-11 |
Ni | 1056 | 1.088 x 10-10 |
Ni | 1097 | 1.366 x 10-10 |
Ni | 1154 | 1.947 x 10-10 |
Ni | 1201 | 2.566 x 10-10 |
25MnTi | 950 | 2.801 x 10-12 |
25MnTi | 1001 | 4.424 x 10-12 |
25MnTi | 1097 | 8.779 x 10-12 |
25MnTi | 1147 | 1.388 x 10-11 |
25MnTi | 1201 | 1.866 x 10-11 |
Fe-3%Si | 904 | 1.694 x 10-11 |
Fe-3%Si | 954 | 2.613 x 10-11 |
Fe-3%Si | 1003 | 3.639 x 10-11 |
Fe-3%Si | 1056 | 4.879 x 10-11 |
Fe-3%Si | 1104 | 6.445 x 10-11 |
Table 70
Parameters for B Diffusion in Various Alloys
Material | Do (m2/s) | Q (kcal/mol) |
04MnNb | 2.6 x 10-7 | 26.5 |
Fe-30%Ni | 1.9 x 10-6 | 27.5 |
Ni | 6.6 x 10-7 | 23.0 |
25MnTi | 2.0 x 10-7 | 27.2 |
Fe-3%Si | 1.5 x 10-7 | 21.2 |