论文部分内容阅读
本文通过一组c轴与主应力(σ_1)夹角ψ不同的人工合成石英单晶体定向样品的实验变形,研究了主应力取向对石英晶体滑移系开动的影响。研究表明,主应力取向对石英晶体滑移系的可动性有明显影响:在450—650℃温度,300—500MPa围压条件下,当ψ=0°时,石英滑移系不开动;ψ=90°时,(001)[100]、(011)[111]等底面或锥面的滑移系有微小动作;ψ=45°时,石英晶体滑移系可动性最好。在这种温度压力条件下,石英晶体的位错沿开动的滑移系运动是石英产生塑性变形的直接原因。
In this paper, we investigate the effect of principal stress orientation on the slippage of quartz crystals by experimental deformation of a set of oriented synthetic quartz single crystals with different c-axis and principal stress (σ_1) angles. The results show that the principal stress orientation has a significant influence on the mobility of the quartz crystal slip system: the quartz slip system does not start at a temperature of 450-650 ℃ and a confining pressure of 300-500MPa; ψ = 90 °, the slip systems of (001) [100], (011) [111] and so on have a slight movement on the bottom surface or the conical surface. When ψ = 45 °, the movement of the quartz crystal slip system is the best. Under such temperature and pressure conditions, the movement of quartz crystal dislocations along the slipping slip system is the direct cause of the plastic deformation of quartz.