共查询到20条相似文献，搜索用时 15 毫秒
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为了降低高能炸药六硝基六氮杂异伍兹烷(HNIW,CL-20)的机械感度,以DMSO为溶剂,水、水+离子液体、水+乙酸、水+乙酸+离子液体分别为非溶剂,对CL-20和钝感炸药TATB进行了共同结晶研究。采用溶剂-非溶剂法重结晶,制备得到CL-20/TATB共同结晶晶体,通过红外光谱、扫描电镜、热重-差热分析及撞击感度分析。分析表明,所得晶体为几百纳米到几微米、分散性良好的、多边形或圆形片状晶体,特性落高为26.5~36.5 cm,撞击感度显著降低。 相似文献
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Jason S. Moore Keith D. Morrison Alan K. Burnham Ana Racoveanu John G. Reynolds Batikan Koroglu Keith R. Coffee Greg L. Klunder 《Propellants, Explosives, Pyrotechnics》2024,49(2):e202300237
We investigate and model the cook-off behavior of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) to understand the response of explosive systems in abnormal thermal environments. Decomposition has been explored via conventional ODTX (one-dimensional time-to-explosion), PODTX (ODTX with pressure-measurement), PyGC-MS (pyrolysis gas chromatography mass spectrometry), TGA (thermo-gravimetric analysis), DSC (differential scanning calorimetry), and IR (infrared spectroscopy) experiments under isothermal and ramped temperature profiles. The data were used to fit rate parameters for proposed reaction schemes in a MATLAB thermo-chemical computational model. These parameterizations were carried out utilizing a genetic algorithm optimization method on LLNL's high-performance computing clusters, which enabled significant parallelization. These results include a multi-step reaction decomposition model, identification of likely autocatalytic gas-phase species, accurate high-temperature sensitization, and prediction of confined system pressurization. This model will be scalable to several applications involving TATB-based explosives, like LX-17, including thermal safety models of full-scale systems. 相似文献
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TATB基PBX的热膨胀系数研究 总被引：3，自引：1，他引：3
用线膨胀仪测试了TATB基PBX的线膨胀系数(CTE)，分析了配方、工艺等因素对PBX的CTE的影响情况。结果表明，氟聚合物粘结的TATB基PBX在室温—70℃间的CTE值很大，粘结剂氟聚合物在物理特性上的差别对TATB基PBX的CTE影响很小，而替用玻璃化转变温度高于75℃的高聚物可使PBX在室温—70℃间的CTE值显著下降。与钢模压制方法相比，采用等静液压方法可以便TATB基PBX药柱在室温—70℃的CTE值降低30％以上。冷热循环处理也可在一定程度上降低PBX的CTE值。 相似文献
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采用溶剂/非溶剂法,在超声辅助的情况下,制备了TATB/HMX共晶炸药;探究了TATB/HMX共晶技术的影响因素;计算了TATB/HMX共晶炸药的理论密度和理论爆速;采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和差示扫描热量法(DSC)对其进行表征和热分析,并测试了其撞击感度。结果表明,制备TATB/HMX共晶的最佳工艺条件为:以[Emim]Ac/DMSO为复合溶剂,TATB和HMX投料比(摩尔比)为3∶7,温度为80℃,搅拌速率为500r/min;与原料相比,TATB/HMX共晶分子在结构上发生改变;TATB/HMX共晶炸药颗粒大小约为2μm,形貌为六边形晶体;共晶炸药的热安定性优于原料HMX,其特性落高比原料HMX高74cm,撞击感度明显降低;理论密度为1.891g/cm~3,理论爆速为8.758km/s,表明其爆炸性能良好。 相似文献
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叠氮类含能粘合剂研究进展 总被引：2，自引：0，他引：2
粘合剂含能化是火炸药未来的发展方向,叠氮类粘合剂是含能粘合剂中的典型代表。该文主要从热塑性含能粘合剂和热固性含能粘合剂两方面综述了近5年叠氮类粘合剂研究进展,并对该类粘合剂的发展趋势和应用前景进行了展望。 相似文献
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Yang Yang Zhuoping Duan Shurui Li Yong Han Hui Huang Liansheng Zhang Fenglei Huang 《Propellants, Explosives, Pyrotechnics》2023,48(1):e202200088
Investigations of the detonation characteristics of a new aluminized DNAN-based melt-cast explosive RMA-2X (containing 30 wt.% DNAN (2,4-dinitroanisole), 30 wt.% NTO (3-nitro-1,2,4-triazol-5-one), 10 wt.% HMX (1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane) and 30 wt.% aluminum) were undertaken, as well as a lithium fluoride (LiF) substituted explosive RMF-2X (containing 30 wt.% DNAN, 30 wt.% NTO, 10 wt.% HMX and 30 wt.% LiF). The interfacial velocity experiment was carried out to measure the reaction zone parameters (including the CJ pressure, the pressure at the Von Neumann spike, and the reaction zone length) of RMA-2X. The cylinder test was also performed, and employing the test data, the detonation velocity, the Gurney energy, and the detonation energy of RMA-2X were calculated. Investigation results are analyzed and some conclusions are drawn. The role of aluminum in the detonation characteristics are also discussed. Finally, parameters of the Jones-Wilkins-Lee equation of state of the detonation products were confirmed. 相似文献
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《Propellants, Explosives, Pyrotechnics》2018,43(3):267-273
Ammonium perchlorate(AP) and LiBH4 can form an oxidation‐fuel energetic system, which provides a new development direction in designing novel mixed explosive formula. The microcalorimetry and self‐designed slow cook‐off setup were used to study thermal performance of AP/LiBH4 energetic powders and grains respectively. Experimental results show that heat release in microcalorimetry method for the mixed system at low temperature was due to the reaction between LiBH4 and residual water vapour. The oxidant gases from AP decomposition participate in the oxidation of LiBH4 at high temperature. The ignition temperature for the AP/LiBH4 grain was 270 °C and the explosion reactions were violent in slow cook‐off test. 相似文献
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物理界面对炸药慢速烤燃特性的影响 总被引：1，自引：0，他引：1
利用自行设计的烤燃试验装置,在1℃/min的升温速率下对RDX基高能炸药进行了慢速烤燃试验。用FLUENT软件进行了模拟计算,研究了3种物理界面(空气、T-09耐烧蚀隔热涂料和GPS-2硅橡胶涂料)对炸药慢速烤燃特性的影响。结果表明,物理界面是影响炸药慢速烤燃响应特性的重要因素。相同条件下,物理界面为空气时,能增加烤燃弹的烤燃响应温度、响应时间以及烤燃响应的剧烈性;物理界面为惰性材料时,能增加烤燃弹的烤燃响应温度、响应时间,降低烤燃弹烤燃响应的剧烈性。数值计算结果表明,炸药慢速烤燃响应温度及烤燃时间受物理层厚度的影响,物理层厚度为0~5mm时,炸药烤燃响应温度、烤燃时间随着物理层厚度的增加而增大;物理层厚度为2.5mm时,炸药烤燃响应温度、烤燃时间达到最大值,之后随着物理层厚度的增加而减小。 相似文献
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从模拟燃烧条件、组分相互作用、组分物理状态、分析测试技术等几方面介绍了含能材料燃烧过程中热分解化学研究近几年来的最新进展。着重介绍燃烧热分解中的基元反应对建立推进剂燃烧新型模型的重要性、氧化剂和黏合剂及催化剂之间的相互作用、氧化剂的黏度和相态变化对燃烧和热分解过程的影响。 相似文献
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Wenquan Zhang Honglei Xia Rujing Yu Jiaheng Zhang Kangcai Wang Qinghua Zhang 《Propellants, Explosives, Pyrotechnics》2020,45(4):546-553
A series of novel fused-ring pyrazolo[4,3-c]pyrazole derivatives featuring N-dinitromethyl and N-fluorodinitromethyl energetic groups (compounds 3 – 7 ) were synthesized using a nine-step reaction. All these compounds were characterized using multinuclear nuclear magnetic resonance (NMR) spectroscopy, infra-red (IR) spectroscopy, and elemental analysis. X-ray diffraction analysis was performed, and the single-crystal structures of compounds 3 , 4 , 6, and 7 were obtained. For these newly prepared energetic materials, the thermal stability was determined using differential scanning calorimetry (DSC), while the sensitivities were evaluated using BAM drop hammer and friction test. The calculated heat of formation values and the measured densities were used to determine the detonation parameters, including detonation velocity and pressure, using the EXPLO5 program. Of all the prepared compounds, dipotassium 1,4-bis(dinitromethyl)-3,6-dinitro-1,4-dihydropyrazolo[4,3-c]pyrazole ( 3 ) was crystallized as a three-dimensional energetic metal-organic framework (MOF) and showed outstanding detonation performances, which even outperformed the traditional primary explosive lead azide. Compound 7 exhibited a high crystal density of 1.939 g cm−3, the high decomposition temperature of 213 °C and desirable impact and friction sensitivities (IS: 12 J; FS: 240 N). These combined properties and performances make these novel fused-ring energetic compounds suitable candidates for high-performance energetic materials. 相似文献
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Philip Pagoria 《Propellants, Explosives, Pyrotechnics》2016,41(3):452-469
The continued interest in improving the safety of munitions towards unintentional insults has led to a significant amount of research in the synthesis of new insensitive energetic compounds. This paper discusses various approaches to the synthesis of insensitive energetic compounds, theoretical modeling and correlations of structural properties that contribute to reducing the sensitivity of energetic compounds, and how synthetic chemists integrate theoretical predictions into the design and synthesis of new insensitive energetic compounds. 相似文献
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DMA法评价TATB填充含氟共聚物的耐热性 总被引：1，自引：0，他引：1
用DMA研究了TATB填充氟聚物的耐热性，并用常规力学性能分析加以验证，探讨了TATB粒径及复合物制样方式对TATB填充氟聚物动力学性能的影响。结果表明，(1)使用大颗粒TATB的PBX，其耐热温度高于使用小颗粒TATB的PBX耐热温度；(2)等静压制试样的耐热性好于模压制试样的耐热性；(3)在耐热温度处，TATB填充含氟共聚物的力学性能呈现突变，表明DMA技术可用于表征材料的耐热性。 相似文献
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P. B. Mirkarimi S. T. Pease Y. Moua F. J. Gagliardi A. E. Gash 《Propellants, Explosives, Pyrotechnics》2023,48(7):e202200337
In this paper we present measurements and analysis on the mechanical and thermomechanical properties of the LLM-105 based plastic bonded high explosive RX-55-DQ. Specifically we present uni-axial compression, and thermal measurements (CTE and ratchet growth), and for some of the measurements we provide a comparison to measurements on TATB-based PBX 9502. We also present the same mechanical property measurements performed on RX-55-DQ samples that underwent accelerated aging. 相似文献
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Xiang Zhou Ying Zhu Zhipeng Cheng Xiang Ke Kaiwen Shi Kaili Zhang 《Propellants, Explosives, Pyrotechnics》2019,44(11):1368-1374
The effect of interfacial contact conditions between cyclotrimethylenetrinitramine (RDX) and copper oxide (CuO) on the thermal decomposition kinetics of RDX was investigated in this study. CuO was deposited onto the surface of superfine RDX particles to form RDX@CuO core‐shell structure through RF magnetron sputtering technology. The thermal decomposition characteristics of RDX, RDX@CuO and RDX‐CuO ultrasonic mixture were studied through thermo‐gravimetric method. Kissinger and Kissinger‐Akahira‐Sunose methods were used to obtain kinetic parameters of thermal decomposition processes. It was found that the temperature corresponding to maximum weight loss rate decreased in the order of RDX>RDX‐CuO>RDX@CuO. However, the apparent activation energy of RDX decomposition did not show apparent difference for the two kinds of CuO‐containing samples. The results indicate that the interfacial contact conditions between RDX and CuO have an effect on the thermal stability of RDX but do not alter the thermal decomposition paths of RDX. 相似文献