应用于200C至1800C蓝宝石中基面和棱面滑移的Peierls机制的kink对模型分析
Analysis of a kink pair model applied to a peierls mechanism in basal and prism plane slips in sapphire deformed between 200C and 1800C
AI总结：
该研究改进kink对形核传播模型，考虑位错密度和段长随温度应力变化，成功拟合蓝宝石基面与棱面滑移的CRSS实验数据，揭示位错解离机制及应力依赖的位错密度作用。
摘要：
本文重新审视并修改了一个基于高Peierls应力晶体中kink对形核与传播控制的位错滑移模型，以考虑位错密度和位错段长度随温度及应力的变化。该模型被应用于蓝宝石（α-Al2O3）中基面和棱面滑移的临界分解剪切应力（CRSS）。根据关于蓝宝石中位错的公认知识，基面滑移和棱面滑移分别采用不解离位错和解离位错进行建模；在后一种情况下，不全位错独立运动。在众多拟合参数组中，通过采用物理上合理的参数（包括位错密度对应力的依赖性），在长位错段极限下，实验与模型计算的CRSS在整个温度范围内获得了良好的一致性。
英文摘要：
A model based on dislocation glide controlled by the nucleation and propagation of kink pairs in a high Peierls stress crystal is revisited and modified to account for changes in dislocation densities and segment lengths with temperature and stress. It is applied to the critical resolved shear stress (CRSS) for basal and prism plane slip in sapphire (alpha-Al2O3). According to agreed-upon knowledge on dislocations in sapphire, basal slip and prism plane slip are modelled with undissociated and dissociated dislocations, respectively. In the latter case, partial dislocations move independently. Amongst a number of sets of fitting parameters, good fits between experimental and modelled CRSS9s are obtained in the long segment limit over the whole range of temperatures by making use of physically sound parameters, including a stress dependence of the dislocation density.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
