Shock wave on materials
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- 作者：Xiuxia Cao (1)
Tao Li (1)
Xuhai Li (1)
Chuanmin Meng (1)
Xianming Zhou (1)
Wenjun Zhu (1) - 关键词：Shock compression ; Phase transition ; Optical and mechanical property ; Reaction synthesis
- 刊名：Chinese Science Bulletin
- 出版年：2014
- 出版时间：December 2014
- 年：2014
- 卷：59
- 期：36
- 页码：5302-5308
- 全文大小：1,911 KB
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Tao Li (1)
Xuhai Li (1)
Chuanmin Meng (1)
Xianming Zhou (1)
Wenjun Zhu (1)
1. National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang, 621900, China - ISSN：1861-9541
文摘
Shock wave is associated with dynamic loading that can result in phase transition (PT), optical and mechanical property changing, and chemical reaction on materials. Here, we report recent progress about shock-induced PT of polycrystalline iron, the underlying mechanism of the optical emission from sapphire, and the synthesis from single-phase RuSi in the National Key Laboratory of Shock Wave and Detonation Physics. Results indicated that grain boundary (GB) could affect the PT pressure threshold and rate of iron, the pressure threshold decreases with decreasing GB defects, and the PT rate shows a variation with increasing GB size; wavelength-dependent optical emissivity (non-gray-body emission) would be generated that was not revealed previously for shocked sapphire, and the observed luminescence was from the shock-induced shear bands, but without superheating phenomenon; shock compression could be an effective way to synthesis Ru-Si nanocrystals, when the shock pressure was appropriate; and Ru-Si powder could completely transform to fine-grain structure CsCl-type Ru-Si at 40.4?GPa.