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利用小型脉冲功率装置CQ-4, 实现了RDX单晶(210), (100)两种晶向15 GPa内的斜波压缩加载. 利用激光干涉测速技术, 实验获得了RDX单晶样品与LiF界面的速度历史曲线. 速度曲线表现出明显的三波结构, 表明出现了弹塑性转变和α-γ相变. 分别计算了两种晶向的应力屈服极限和屈服强度, 不同晶向的RDX单晶的屈服极限表现出明显的差别. 并对斜波加载下的α-γ相变特征进行了分析, 两种晶向的相转变起始压力基本相同, α-γ相变起始压力在3.5—4.0 GPa之间, 相变起始压力至5 GPa内均为相转变区, 5—15 GPa为稳定新相.The dynamics of RDX single crystal under ramp wave loading is studied experimentally and numerically. The ramp wave loading experiments on RDX single crystal in the orientation of (210) and (100) within 15 GPa are carried out with the magnetic driven device CQ-4, which can provide a loading pressure waveform with a rising time of 450–600 ns. The particle velocity curves of the interface between RDX single crystal and LiF window are obtained with the photonic Doppler velocimetry (PDV). The velocity profiles show an obvious three-wave structure, indicating that the RDX undergoes physical processes such as elastic-plastic transition and α-to-γ phase transition in the loading section. The stress yield limits of different crystallographic orientations of RDX single crystal show obvious difference. The onset phase transition pressures in two crystallographic orientations are the same, which is between 3.5 GPa and 4.0 GPa. The pressure range of phase transition is between initial phase transition pressure and 5 GPa. The γ phase is stable from 5 GPa to 15 GPa. The Hayes multi-phase equation of state and non-equilibrium phase transition kinetic model are employed to simulate the experimental process, and the numerical results can well describe the experimental physical processes such as elastoplastic transformation and phase transformation in the loading section. The calculated results reveal that the correction of the bulk modulus with pressure is necessary under ramp wave compression.
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[16] 罗斌强, 张红平, 种涛, 王桂吉, 谭福利, 赵剑衡, 孙承纬 2017 高压物理学报 31 295
Google Scholar
Luo B Q, Zhang H P, Chong T, Wang G J, Tan F L, Zhao J H, Sun C W 2017 Chin. J. High. Pressure Phys. 31 295
Google Scholar
[17] Baer M R, Hobbs M L, Hall C A, Hooks D E, Gustavsen R L, Sheffield S A 2007 Shock Compression of Condensed Matter New York, United States, June 23 −29, 2007 p1165
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Google Scholar
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Chong T, Wang G J, Tan F L, Luo B Q, Zhang X P, Wu G, Zhao J H 2014 Sci. Sin-Phys. Mech Astron 44 630
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图 4 RDX单晶(210)晶向实验速度曲线
Fig. 4. Experimental velocity curve of (210) RDX single crystal explosive.
图 5 RDX单晶(100)晶向实验速度曲线
Fig. 5. Experimental velocity curve of (100) RDX single crystal explosive.
图 7 RDX与LiF窗口之间界面处的压力历史曲线 (a) (210)晶向; (b) (100) 晶向
Fig. 7. Pressure history curves at the interface between RDX single crystal explosive and LiF: (a) (210) crystal orientation; (b) (100) crystal orientation.
图 8 (210)晶向模拟计算结果与实验结果对比
Fig. 8. Calculated and experimental data of (210) RDX single crystal explosive.
图 9 (100)晶向模拟计算结果与实验结果对比
Fig. 9. Calculated and experimental data of (100) RDX single crystal explosive.
表 1 实验条件
Table 1. Experimental condition.
实验发次 样品晶向 样品厚度/mm 充电电压/kV Shot-1 RDX(210) 0.763 70 0.697 Shot-2 RDX(100) 0.835 70 0.746 
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表 2 数值模拟的模型参数
Table 2. Parameters for numerical simulation.
晶向 形核时间/ns n 屈服强度/GPa Kξ/GPa $K_\xi '$ Remarks (210) 60 1.3 0.5 10.10 8.20 α 9.56 5.03 γ (100) 60 1.3 0.7 13.00 10.20 α 10.56 8.53 γ
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[1] Hall C A, Asay J R, Knudson M D, Stygar W A, Spielman R B, Pointon T D 2001 Rev. Sci. Instrum. 72 3587
Google Scholar
[2] Hare D E, Forbes J W, Reisman D B 2004 Appl. Phys. Lett. 85 949
Google Scholar
[3] Hare D E, Reisman D B, Garcia F, Green L G, Forbes J W, Furnish M D, Hall C, Hickman J W 2004 AIP Conference Proceedings 706 145
Google Scholar
[4] Hare D E, Reisman D B, Dick J J 2004 UCRL-JRNL-202601
[5] Baer M R, Root S, Dattelbaum D Hooks D E, Gustavsen R L, Orler B, Pierce T, Garcia F, Vandersall K, DeFisher S, Travers B 2009 AIP Conference Proceedings 706 699
[6] Baer M R, Hall C A, Gustavsen R L 2007 J. Appl. Phys. 101 034906
Google Scholar
[7] Ricardo I C, Leonardo C P, Samuel P H 2010 J. Mol. Struct. 970 51
Google Scholar
[8] Dreger Z A, Gupta Y M 2007 J. Phys. Chem. B. 111 3893
Google Scholar
[9] Goto N, Fujihisa H, Yamawaki H, Wakabayashi K, Nakayama Y, Yoshida M, Koshi M 2006 J. Phys. Chem. B. 110 23655
Google Scholar
[10] Patterson J E, Dreger Z A, Gupta Y M 2007 J. Phys. Chem. B 111 10897
Google Scholar
[11] Cawkwell M J, Ramos K J, Hooks D E, Sewell T D 2010 J. Appl. Phys. 107 063512
Google Scholar
[12] Ramos K J, Hooks D E, Sewell T D, Cawkwell M J 2010 J. Appl. Phys. 108 066105
Google Scholar
[13] Cawkwell M J, Sewell T D, Zheng L, Thompson D L 2008 Phys. Rev. B. 78 014107
Google Scholar
[14] Hooks D E, Ramos K J, Martinez A R 2006 J. Appl. Phys. 100 024908
Google Scholar
[15] Wang G J, Luo B Q, Zhang X P, Zhao J H, Sun C W, Tan F L, Chong T, Mo J J, Wu G, TaO Y H 2013 Rev. Sci. Instrum. 84 015117
Google Scholar
[16] 罗斌强, 张红平, 种涛, 王桂吉, 谭福利, 赵剑衡, 孙承纬 2017 高压物理学报 31 295
Google Scholar
Luo B Q, Zhang H P, Chong T, Wang G J, Tan F L, Zhao J H, Sun C W 2017 Chin. J. High. Pressure Phys. 31 295
Google Scholar
[17] Baer M R, Hobbs M L, Hall C A, Hooks D E, Gustavsen R L, Sheffield S A 2007 Shock Compression of Condensed Matter New York, United States, June 23 −29, 2007 p1165
[18] Munday Lynn B, Chung Peter W, Rice Betsy M, Solares Santiago D 2011 J. Phys. Chem. B 115 4378
Google Scholar
[19] Ralph Menikoff, Dick J J, Hooks D E 2005 J. Appl. Phys. 97 023529
Google Scholar
[20] 种涛, 王桂吉, 谭福利, 罗斌强, 张旭平, 吴刚, 赵剑衡 2014 中国科学: 物理学 力学 天文学 44 630
Google Scholar
Chong T, Wang G J, Tan F L, Luo B Q, Zhang X P, Wu G, Zhao J H 2014 Sci. Sin-Phys. Mech Astron 44 630
Google Scholar
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