Diffusion in Titanium.

概要

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Recent studies of self-diffusion and impurity diffusion in α- and β-titanium are reviewed. The transition metal elements and phosphorus exhibit fast diffusion in α-Ti, which are three to five orders of magnitude faster than the self-diffusion. The mechanism of the fast diffusion is discussed on the basis of the several features: the effect of α→β phase transformation, the diffusion anisotropy, the atomic size effect and the correlation between solubility and diffusivity. In β-Ti self- and impurity diffusion exhibit marked upward curvatures in the Arrhenius plots, which are known as anomalous diffusion, Various models proposed to explain the anomalous behaviour are briefly reviewed.
The Iron and Steel Institute of Japanの論文