冲击压缩下单晶LiF高压声速及卸载路径研究

于锦泉; 肖亚斌; 周显明; 谭华

doi:10.11858/gywlxb.2005.03.003

冲击压缩下单晶LiF高压声速及卸载路径研究

doi: 10.11858/gywlxb.2005.03.003

1.
中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室，四川绵阳 621900；
2.
国防科技大学理学院，湖南长沙 410073

详细信息

通讯作者:
于锦泉

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出版历程
- 收稿日期: 2004-01-17
- 修回日期: 2005-01-13
- 发布日期: 2005-09-05

Study on Sound Velocity and Unloading Path for Single Crystal LiF under Shock Compression

1.
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Mianyang 621900, China;
2.
College of Science, National University of Defense Technology, Changsha 410073, China

More Information

Corresponding author: YU Jin-Quan

摘要

摘要: 采用二级轻气炮加载手段，在5~79.1 GPa冲击压力范围内，利用加窗VISAR技术对氟化锂（LiF）单晶样品进行了研究，得到了不同冲击压力下的纵波声速、体积声速以及卸载路径。实验结果显示：单晶LiF沿冲击绝热线的Lagrange纵波声速随粒子速度呈线性变化；在5~79.1 GPa冲击压力下，单晶LiF并未发生熔化及其它相变；卸载路径及速度剖面弹塑性明显。
- LiF /
- 逆向碰撞 /
- 高压声速 /
- 卸载路径 /
- VISAR
Abstract: Symmetrical impact experiments for single crystal LiF were conduced at two-stage light-gas gun with a VISAR diagnostic. Longitudinal and bulk sound velocities, and unloading path of LiF were obtained up to 79.1 GPa shock pressure. Experimental results indicate a good linearity between the Lagrangian longitudinal sound velocity and the particle velocity. There is no evidence of shock-induced melting or phase transition for LiF in the present pressure range. The LiF unloading path and velocity profiles show a clear transformation from the elastic release to the plastic unloading.
- LiF /
- reverse-impact /
- sound velocity /
- unloading path /
- VISAR

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