Study on the interaction between a dislocation and impurities Part IX Influence of an impurity (divalent cation) size on activation energy ΔH(Tc)
大島商船高等専門学校紀要 Volume 41
Page 121-124
published_at 2008-12
Title
転位と不純物との相互作用に関する研究(9) : 活性化エネルギーΔH(Tc)に及ぼす 不純物（2 価陽イオン）サイズの影響
Study on the interaction between a dislocation and impurities Part IX Influence of an impurity (divalent cation) size on activation energy ΔH(Tc)
Source Identifiers
Creator Keywords
moving dislocation
plastic deformation
strain-rate cycling tests
ultrasonic oscillation
force-distance profile between a dislocation and an impurity
activation energy
The four kinds of specimens (KCl:Mg2+, Ca2+, Sr2+, or Ba2+) were deformed by compression along the <100> axis at 77－254K and ultrasonic oscillatory stress was applied in the same direction as the compression. The activation energy for overcoming of the impurity by a dislocation was determined by examining the relative curve of strain-rate sensitivity and stress decrement due to the oscillation. The activation energy increases with the divalent ionic size. Fleischer’s model attributes this to the difference of tetragonality around the divalent ion-vacancy dipole for each specimen.
Languages
jpn
Resource Type
departmental bulletin paper
Publishers
大島商船高等専門学校
Date Issued
2008-12
File Version
Version of Record
Access Rights
open access
Relations
[ISSN]0387-9232
[NCID]AN00031668