転位と不純物との相互作用に関する研究その6 : KCl:Sr^2+単結晶中の転位と不純物との力対距離関係に及ぼす不純物の状態の影響

概要

論文の詳細を見る
Strain-rate cycling tests associated with the oscillation were carried out at 80 to 240K for two kindsof single crystals: quenched and annealed specimens of KCl:Sr^2+ (0.050 mol% in the melt). The followingthree results were mainly found on the basis of linear plots of effective stress vs. temperature andproportionality of temperature vs. activation energy. 1: The force-distance profile, which expresses theinteraction between a dislocation and an impurity, cannot be approximated by the Fleischer's modelwhen I-V (Impurity-Vacancy) dipoles turn into aggregates (at least trimers). 2: Comparing with thequenched specimen, the activation energy for the break away of a dislocation from the impuritybecomes small for the annealed one. 3: The critical temperature, T_C, for the annealed specimen isslightly smaller in contrast to that for the quenched one.
大島商船高等専門学校の論文
2007-12-01