...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical Review X >Real-Time Observation of Stacking Faults in Gold Shock Compressed to 150?GPa
【24h】

Real-Time Observation of Stacking Faults in Gold Shock Compressed to 150?GPa

机译：实时观察金冲击压缩到150？GPA

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A microscopic-level understanding of the high-pressure states achieved under shock compression, including comparisons with static compression, is a long-standing and important scientific challenge. Unlike hydrostatic compression, uniaxial strains inherent to shock compression result in plastic deformation and abundant lattice defects. At high pressures ( 50 GPa ), the role of shock-induced deformation and defects remains an open question. Because of the nanosecond time scales in shock experiments, real-time in?situ observations of shock-induced lattice defects have been challenging. Here, we present synchrotron x-ray diffraction measurements on laser-shock-compressed gold that provide the first unambiguous in?situ measurements of stacking faults (SFs), likely formed by partial dislocations, during shock compression. SF abundance increases monotonically with shock compression up to 150?GPa, where SFs comprise almost every 6th atomic layer. Our results show that SFs play an important role in the plastic deformation of face-centered-cubic metals shocked to high stresses, providing a quantitative benchmark for future theoretical developments.
机译：对震动压缩下实现的高压状态的微观程度的理解，包括静态压缩的比较，是一种长期和重要的科学挑战。与静液压压缩不同，对冲击压缩固有的单轴菌株导致塑性变形和丰富的晶格缺陷。在高压（> 50GPa）中，冲击引起的变形和缺陷的作用仍然是一个开放的问题。由于休克实验中的纳秒时间尺度，实时的震惊诱导的晶格缺陷的原位观察一直挑战。在这里，我们在激光冲击压缩金上呈现同步X射线衍射测量，其提供第一明确的堆叠故障（SFS）的原位测量，这可能在震动压缩期间由部分位错形成。 SF丰度在单调上随着冲击压缩而单调增加，高达150°GPA，其中SFS几乎包括每第6个原子层。我们的研究结果表明，SFS在震动对高应力的塑性变形中发挥着重要作用，为未来的理论发展提供了定量基准。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号