A New Explanation for Interstitial Migration Anomaly in Transition Metals by Using a Model d-Band

抄録

The atomic radius and the actual valence dependence of the band electron energy has been calculated by using a model d-band for transition metals in a wide range of atomic radius to cover the interstitial configuration as well as the normal equilibrium lattice site. From this calculation the pressure acting on an interstitial atom has been estimated and compared with the migration temperature determined experimentally for 3d, 4d and 5d transition group elements. The anomalously high migration temperatures of interstitials in the titanium group can be explained by the present theory. The low migration temperatures for the copper group elements are also discussed.