On the structural-phase change of transition metals implanted by interstitial element ions

Structural-phase changes of transition metals under implantation by B+,C+,N+,O+,F+ ions at room temperature are investigated. The dual character of structural transition versus a kind of ions: recrystallization or amorphization - is discovered. Short-range order parameters and charge states of impurity atoms are determined. In the work a mechanism of structural changes and amorphization is formulated according to which the character of transition determines by the energetic state of impurity atom electrons subsystem into implanted excited layer. The suggested configuration model of structural changes allows to determine the direction, the kind and critical dose of the structural transition under implantation. 22 refs.; 1 fig.; 3 tabs. (author)