非静水压下HMX炸药晶体的高压相变  

High Pressure Phase Transition of HMX Crystal under Non-Hydrostatic Pressure

作　　者：随志磊 代如成 王中平[2] 郑贤旭[1] 张增明[2] SUI Zhilei;DAI Rucheng;WANG Zhongping;ZHENG Xianxu;ZHANG Zengming(Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621999,Sichuan,China;School of Physics Science,University of Science and Technology of China,Hefei 230026,Anhui,China)

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621999 [2]中国科学技术大学物理学院,安徽合肥230026

出　　处：《高压物理学报》2022年第3期15-22,共8页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(11904340);科学挑战专题(TZ2016001)。

摘　　要：HMX是一种性能优良的高能炸药,在武器工业中广泛使用。目前,HMX在高压下特别是非静水压下的相变规律仍存在争议。为此,采用不同的传压介质,开展了非静水压下HMX晶体的高压拉曼实验研究。结果表明,HMX晶体分别在4.9、13.9和17.5 GPa发生了结构相变。在13.9 GPa下,HMX开始发生相Ⅱ→相Ⅲ的相变,并在一定的压力范围内两相共存;当压力为17.5 GPa时,出现另一个新相(相Ⅳ),在17.5~23.6 GPa的压力范围内出现相Ⅱ、相Ⅲ和相Ⅳ三相共存现象。HMX晶体在非静水压下的相变路径与准静水压下的相变路径完全不同,非静水压环境下的压力梯度是造成该差异的原因。HMX is a high-energy explosive with excellent performance and is widely used in weapons.The phase transition law of HMX,especially under non-hydrostatic pressure,is controversial.In this work,a high-pressure Raman experimental study of HMX crystals under non-hydrostatic pressure was carried out using different pressure-transmitting media.The HMX crystal undergoes three phase transitions at pressures of 4.9,13.9 and 17.5 GPa,respectively.Under the pressure of 13.9 GPa,HMX began to undergo phase transition from structureⅡto structureⅢ,and the two phases existed simultaneously within a certain pressure range;another new phase(structureⅣ)began to appear from 17.5 GPa.The three-phase coexistence of structureⅡ,structureⅢand structureⅣappeared in the pressure range of 17.5−23.6 GPa.Importantly,the phase transition process of HMX crystals under non-hydrostatic pressure is completely different from the phase transition path under quasi-hydrostatic pressure,and the pressure gradient under non-hydrostatic pressure environment is the reason for the difference.

关 键 词：HMX晶体 拉曼光谱 相变 非静水压 

分 类 号：O521.2[理学—高压高温物理]