Pure (4N5) Fe, with a grain size of 0.25mm was implanted with 27Al+ ions (40keV) to a fluence of 9 x 1016/cm. The 15at%Al specimens were then annealed in dry Ar and the diffusion coefficients (table 31) were calculated by monitoring changes in the Al distribution profiles at between 775 and 900C. The latter data were found to obey:
D (cm2/s) = 1.6 x 100 exp[-3.17(eV)/kT]
J.Hirvonen, J.Räisänen: Journal of Applied Physics, 1982, 53[4], 3314-6
Table 31
Diffusion Coefficients for Al in Fe-15at%Al
Temperature (C) | D (cm2/s) |
775 | 1.0 x 10-15 |
800 | 1.8 x 10-15 |
825 | 5.6 x 10-15 |
850 | 9.7 x 10-15 |
875 | 1.8 x 10-14 |
900 | 3.9 x 10-14 |