动载下剪应力对硫化镉单晶相变影响的实验研究

唐志平 Gupta Y M

唐志平, Gupta Y M. 动载下剪应力对硫化镉单晶相变影响的实验研究[J]. 高压物理学报, 1989, 3(4): 290-297 . doi: 10.11858/gywlxb.1989.04.005
引用本文: 唐志平, Gupta Y M. 动载下剪应力对硫化镉单晶相变影响的实验研究[J]. 高压物理学报, 1989, 3(4): 290-297 . doi: 10.11858/gywlxb.1989.04.005
TANG Zhi-Ping, Gupta Y M. Experimental Study of the Effect of Shear Stress on Phase Transition in c-Axis CdS Single Crystal under Dynamic Loading[J]. Chinese Journal of High Pressure Physics, 1989, 3(4): 290-297 . doi: 10.11858/gywlxb.1989.04.005
Citation: TANG Zhi-Ping, Gupta Y M. Experimental Study of the Effect of Shear Stress on Phase Transition in c-Axis CdS Single Crystal under Dynamic Loading[J]. Chinese Journal of High Pressure Physics, 1989, 3(4): 290-297 . doi: 10.11858/gywlxb.1989.04.005

动载下剪应力对硫化镉单晶相变影响的实验研究

doi: 10.11858/gywlxb.1989.04.005
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    通讯作者:

    唐志平

Experimental Study of the Effect of Shear Stress on Phase Transition in c-Axis CdS Single Crystal under Dynamic Loading

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    Corresponding author: TANG Zhi-Ping
  • 摘要: 动载下剪应力对相变起始压力有无影响,长期以来一直是一个未解决的问题。Duvall和Graham建议用硫化镉(CdS)晶体来作为判断材料。本文采用前后压电石英传感器方法系统地研究了高速平面撞击下的c轴CdS单晶试样中剪应力对相变起始压力的影响。实验测得其轴向相变起始应力为T=(3.250.1) GPa,对应的平均压力pT=(2.290.07) GPa,与静高压值2.3 GPa相比在实验误差范围内很吻合,这时相应的剪应力T=0.72 GPa,高达平均压力的31.5%。这一结果表明,相变机制可以假定为仅与临界平均应力或临界热力学状态有关,剪应力对相变起始压力的影响可以忽略。

     

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出版历程
  • 收稿日期:  1989-08-05
  • 修回日期:  1989-08-05
  • 发布日期:  1989-12-05

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