固体材料高功率激光斜波压缩研究进展

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。

Progress in high-power laser ramp compression of solids

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.