固体材料高功率激光斜波压缩研究进展

李牧; 孙承纬; 赵剑衡

doi:10.11883/1001-1455(2015)02-0145-12

固体材料高功率激光斜波压缩研究进展

doi: 10.11883/1001-1455(2015)02-0145-12

中国工程物理研究院流体物理研究所, 四川绵阳 621999

基金项目: 国家自然科学基金项目(11172280, 11472255)

详细信息

作者简介:
李牧(1979—), 男, 博士, 副研究员

通讯作者:
赵剑衡, jianh_zhao@sina.com

中图分类号: O381
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- 被引次数: 0
出版历程
- 收稿日期: 2014-12-26
- 修回日期: 2015-02-20
- 刊出日期: 2015-03-25

Progress in high-power laser ramp compression of solids

Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

摘要

摘要: 利用高功率激光诱导的应力波对固体材料进行高应变率斜波压缩，是近年来快速发展的新型动高压实验技术。与传统加载手段不同，它可以在数ns时间内以极高的应变率(10⁶~10⁹ s^-1)将薄样品平滑加载到数千万大气压，并仍然保持其固体状态。结合多种先进的诊断技术，可以测得样品材料的热力学、动力学参数和原位微观结构特性，是研究动高压物理、物态方程和高应变率动力学问题的先进途径。本文梳理了这种技术的发展历程，对其加载和诊断技术以及已取得的主要结果进行综述，并展望了其发展前景。
- 爆炸力学 /
- 斜波压缩 /
- 高功率激光 /
- 固体材料 /
- 物态方程 /
- 应变率相关
Abstract: Laser-induced stress waves can deliver ramp compression on solid materials with very high strain rates, and it is one of the newly-developed dynamic high-pressure methods in decades. Distinct from the conventional methods, laser ramp compression can reach terapascal pressures smoothly from ambient pressure with a high strain rate 10⁶-10⁹ s^-1, but the sample is still in solid state. During the rapid loading process, the thermodynamic state, dynamic characteristics, and in situ microstructure can all be probed by the advanced diagnostic technology. This method is becoming an important and new approach to further investigation on high-pressure physics, equation of state, and rate-dependent material dynamics. In this paper, the history, principle, diagnostics and main breakthroughs of laser ramp compression are reviewed and expected.
- mechanics of explosion /
- ramp compression /
- high-power laser /
- solids /
- equation of state /
- rate dependent

HTML全文

图 1 激光驱动斜波压缩的基本途径^{[8, 11, 43, 46]}

Figure 1. Approaches to ramp compression by laser^{[8, 11, 43, 46]}

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图 2 NIF正在进行的钽样品高压斜波压缩测量方案和实验靶^[51]

Figure 2. Sketch map of target diffraction in situ (TARDIS) and C-Ta-C sandwich target utilized by NIF^[51]

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图 3 金刚石在无冲击加载和冲击-斜波加载下的不同响应曲线^[39]

Figure 3. Different stress-density curves of diamond under shockless or shock-ramp loading^[39]

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图 4 600 GPa以下钽的物态方程测量结果，冲击-斜波加载声速测量和衍射测量的对比^[50]

Figure 4. Stress-density relations in 600 GPa, shock or ramp compression, there is different between results from sound and diffraction measurement^[50]

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5(a) 铝^[88]的Hugoniot弹性极限与应变率的关系

5(a). Elastic limit as a function of strain rate for Al^[88]

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5(b) 硅^[92]的Hugoniot弹性极限与应变率的关系

5(b). Elastic limit as a function of strain rate for Si^[92]

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5(c) 铁的Hugoniot弹性极限与应变率的关系

5(c). Elastic limit as a function of strain rate for Fe

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5(d) 钽^[20]的Hugoniot弹性极限与应变率的关系

5(d). Elastic limit as a function of strain rate for Ta^[20]

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图 6 材料结构相变的驱动压力与加载应变率的关系，铋^[64]、铁

Figure 6. Over-driven pressure as a function of strain rate for Bi^[64] and Fe

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