Diffusion of ⁵⁹Fe in single-crystal α-Zr

Diffusion in α-Ti and Zr

“…In the particular cases of -Zr, Fe 23) and Co 24) also show a downward curvature that follows the self-diffusion behaviour, as we can see in Fig. 8.…”

“…Nakajima et al 23) found non-Arrhenius behaviour of diffusion of Fe in -Zr. The low activation energy for Fe diffusion in high temperature range is consistent with the general systematics of the atomic-size effect in diffusion, and some kind of interstitial mechanism could be the responsible for such high diffusion coefficients.…”

“…23) where the Fe diffusion coefficients are eight to nine orders of magnitude larger than the self-diffusion ones, the atomic fraction of Fe atoms available for the formation of rapid-pairs amounted from 10 À9 to 10 À8 . In the low temperature region B defined in section 3.1, A will be determined by the mean distance that rapid-pairs travel before they arrive at vacancy sinks and is, then, temperature independent.…”

“…Based on the Fe diffusion in -Zr 23) work, Frank postulates that the tracer self-diffusion, which form rapid-pairs (i.e. Fe), are interrelated via…”

Ab initio approach to the effect of Fe on the diffusion in hcp Zr II: The energy barriers

“…Experimentally, an extremely fast diffusivity of Fe in a-Zr [3], coupled with very low solubility [4] are found. Tracer diffusion studies [3] have established that Fe diffusion is up to nine orders of magnitude faster than Zr self-diffusion, as shown in Fig.…”