転位と不純物との相互作用に関する研究 (23) :　様々な2価不純物を含んだKCl 単結晶中の転位が不純物を乗り越えるときの活性化エンタルピー

Study on the interaction between a dislocation and impurities Part XXIII The enthalpy for the breakaway of a dislocation in KCl single crystals doped with various divalent impurities

Creators Kohzuki Yohichi

The value of ΔH(Tc ) was estimated on the basis of the difference between strain-rate sensitivity (SRS) at first plateau place and at second one on the stair-like relative shape of SRS and stress decrement due to superposition of oscillatory stress during plastic deformation for four kinds of single crystals (KCl: Mg2+, Ca2+, Sr2+ or Ba2+). ΔH(Tc ) is the enthalpy of activation for the breakaway of a dislocation from the impurity. Tc is the critical temperature at which the effective stress due to only one type of the impurities which lie on the dislocation is zero when the dislocation moves forward with the help of oscillation.

[ISSN]0387-9232

[NCID]AN00031668