高压物理学报2018，Vol.32Issue(1)：62-70,9.DOI:10.11858/gywlxb.20170599
桌面式激光驱动冲击波技术及其在含能材料分子反应机制研究中的应用
A Desktop Laser Driven Shock Wave Technique and Its Applications to Molecular Reaction Mechanism of Energetic Materials
摘要
Abstract
The miniature desktop pulse laser equipment can be used to drive shock wave and load dynamic high pressure (DHP) in materials,a technique marked by its low cost,high experimental repetition frequency and ultra high loading rate.The present paper presents the work we have done so far on the desktop laser driven shock wave technique and its corresponding application in exploring the molecular reaction mechanism of energetic materials under shock.We have built an experimental system using nanosecond laser pulses and developed a method to characterize the features of shock wave.The laser driven shock wave obtained in our experiment has a rise-time of only a few nanoseconds and a peak pressure of no less than 2 GPa.This experimental system has been used to study the shock sensitivity of the typical energetic materials RDX.It was found that the intramolecular charge transfer induced by DHP is a key factor influencing the sensitivity.Under high pressure,the electrons on the C-N heterocycle will transfer to the nitro group,leading to the increase of the sensitivity of NO2.This result can provide experimental reference for understanding the shock ignition mechanism of RDX.Through the present and the future subsequent work,we expect to develop a comprehensive experimental technique that can support the investigation about the shock ignition mechanism of energetic materials on the molecular level.关键词
桌面式激光驱动冲击波技术/含能材料/冲击反应/RDXKey words
desktop laser driven shock wave technique/energetic materials/shock reaction/RDX分类
数理科学引用本文复制引用
宋云飞,郑朝阳,吴红琳,郑贤旭,吴强,于国洋,杨延强..桌面式激光驱动冲击波技术及其在含能材料分子反应机制研究中的应用[J].高压物理学报,2018,32(1):62-70,9.基金项目
国家自然科学基金(21673211,11404307) （21673211,11404307）
科学挑战计划(2016001) （2016001）
