共查询到19条相似文献,搜索用时 93 毫秒
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钝感纳米RDX的制备与表征 总被引:6,自引:0,他引:6
用HLG-50型粉碎机大批量制备了纳米RDX,通过共沸分散体系和普通液体体系分别对RDX浆料进行干燥.用TEM、SEM、IR、Raman spectra、XRD以及ICP-AES对干燥后纳米RDX颗粒的大小、形貌及杂质含量进行了表征,测试了纳米RDX的摩擦、撞击和冲击波感度.结果表明,在共沸分散体系中干燥后的RDX颗粒大多在50 nm以下,呈类球形,而普通液体体系干燥后的RDX颗粒团聚长大明显.与原料相比,纳米RDX的纯度很高,并且其机械感度降低明显,尤其是撞击感度和冲击波感度,分别降低46.3%和44.8%. 相似文献
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《火炸药学报》2021,44(4)
为了研究六硝基六氮杂异伍兹烷/环三亚甲基三硝胺(CL-20/RDX)共晶炸药的性能,采用喷雾干燥法制备了质量比为1∶1的CL-20/RDX共晶炸药;通过扫描电镜(SEM)观察了共晶炸药的形貌;采用粉末X-射线衍射法与红外光谱法测试了共晶炸药的结构;采用差示扫描量热法(DSC)测试了共晶炸药的热性能;通过感度实验分别测试了共晶炸药的撞击感度与摩擦感度。结果表明,CL-20/RDX共晶呈球形,粒径在1~5μm; CL-20/RDX共晶的衍射图与CL-20和RDX的衍射图均不完全相同,衍射峰有明显的位移;CL-20/RDX共晶炸药的热分解温度为222.8℃,比CL-20低30℃左右,比RDX低20℃左右,说明共晶的生成对其热性能有较大影响;CL-20/RDX共晶炸药的撞击感度为76%,特性落高为26.9cm,摩擦感度为64%,其机械感度较CL-20有大幅降低,表明共晶炸药的感度显著降低,安全性能得到明显提高,进一步说明共晶在含能材料改性和降感方面的优势。 相似文献
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改变化学基团降低炸药感度的研究 总被引:2,自引:0,他引:2
通过分子组成的改变,可使 RDX 和 TNT 的感度下降。人们已合成 RDX 的亚硝基、三亚硝基的衍生物和3-氨基-TNT,并且进行许多感度试验。结果表明,这些衍生物感度明显下降。从爆炸当量的测定看,得知由于分子组成改变所引起的能量释放的变化是很小的。1.引言降低炸药的感度具有很大的实用价值。本文主要研究的是实验室内试验 RDX 及 TNT 的钝感。RDX 是一种很重要的军用炸药。但它的感度比实用的要求稍高,致使装填 B 炸药(RDX与 TNT 的混合物)的炮弹在射击时引起过早爆炸。为此,人们一直在实验室内努力进行 RDX 相似文献
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Robert J. Hudson Peter Zioupos Philip P. Gill 《Propellants, Explosives, Pyrotechnics》2012,37(2):191-197
The shock sensitivity of RDX is of major interest for the development of insensitive munitions. Previous research has implied that internal defects that form within RDX crystals have a strong sensitising effect, increasing the probability of shock initiation. During the NATO Reduced sensitivity RDX Round Robin (R4) program the number of internal defects within RDX crystals of differing qualities were assessed by optical microscopy and a scoring system. The results suggested that RDX crystals with many internal defects were more sensitive. Studies investigating the mechanical properties of bulk RDX have shown that lots consisting of poorer crystals are weaker. This study investigates the mechanical properties of individual crystals from different RDX lots using nano‐indentation. It is shown that crystals with many internal defects have reduced modulus of elasticity, stiffness and prone to greater deformation under applied load. The results also show a correlation between these parameters and previously reported shock sensitivity data. 相似文献
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AntoineE.D.M. vanderHeijden RichardH.B. Bouma AlbertC. vanderSteen 《Propellants, Explosives, Pyrotechnics》2004,29(5):304-313
TNO Prins Maurits Laboratory has actively followed and contributed to the research on the development of insensitive munitions (IM). One of the initial research topics at TNO focused on the improvement of the shape of RDX crystals and its relation to the shock sensitivity. The variation of crystal shape has been studied by crystallization from different solvents and/or by post‐treatment of the crystals. The role of the mean particle size on shock sensitivity was also included in these analyses. The decrease in shock sensitivity is even more pronounced when controlling the internal quality of crystals. In the meantime research has shifted to other energetic materials as well – in particular HMX and CL‐20 – in this way revealing step by step the important physicochemical parameters which play a role in determining the shock sensitivity of formulations containing these types of nitramines. Various characterization techniques, to determine the internal and external quality of crystals will be discussed, and their relation to shock sensitivity in PBXs will be shown. Two different grades of I‐RDX have been subjected to different characterization tests. The objective is to gain more understanding about which of the physicochemical parameters enables one to discriminate between a reduced sensitivity RDX and normal RDX. 相似文献
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Reduced sensitivity RDX (RS‐RDX) particles are now available from several manufacturers. But a clear understanding of this reduced sensitivity behavior is not yet available. RS‐RDX particles are usually employed in cast formulations to reduce their shock sensitivity. The use of RS‐RDX in pressed formulations is more recent and does not always give reduced sensitivity formulations. 相似文献
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An interlaboratory comparison of seven lots of commercially available RDX was conducted to determine what properties of the nitramine particles can be used to assess whether the RDX has relatively high or relatively low sensitivity. The materials chosen for the study were selected to give a range of HMX content, manufacturing process and reported shock sensitivity. The results of two different shock sensitivity tests conducted on a PBX made with the RDX lots in the study showed that there are measurable differences in the shock sensitivity of the PBXs, but the impact sensitivity for all of the lots is essentially the same. Impact sensitivity is not a good predictor of shock sensitivity for these types of RDX. Although most RDX that exhibits RS has low HMX content, that characteristic alone is not sufficient to guarantee low sensitivity. A range of additional analytical chemistry tests were conducted on the material; two of these (HPLC and DSC) are discussed within. 相似文献
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Christian Spyckerelle Genevive Eck Per Sjberg Anna‐Maria Amnus 《Propellants, Explosives, Pyrotechnics》2008,33(1):14-19
In recent years much interest has been generated in a quality of reduced sensitivity RDX (RS‐RDX), like I‐RDX® which, when incorporated in cast cure and even pressable plastic bonded explosives (PBX compositions), can confer reduced shock sensitivity as measured through gap test. At crystal level, lot of work has been done to try to determine which property or properties may explain the behaviour of the corresponding cast PBX composition. But up to now, and despite an international inter‐laboratory comparison (Round Robin) of seven lots of RDX from five different manufacturers conducted from 2003 to 2005, even if some techniques lead to interesting results, there is no dedicated specification to apply to RS‐RDX. This quality (I‐RDX®) has proved to retain its low sensitivity even after ageing, which does not seem to be the case for standard RDX produced by the Bachmann process (when re‐crystallized under I‐RDX conditions in order to obtain RS‐RDX). It has been shown that the higher sensitivity of RDX produced by the Bachmann process, or the evolution of sensitivity after ageing of RS‐RDX produced from Bachmann RDX may be linked to the presence of octogen (HMX) during the crystallization process. In order to check such hypothesis, low HMX content RDX produced by the Bachmann process has been prepared and evaluated in cast PBX composition (PBX N 109). Results of the characterization of such quality of RDX and its evaluation in cast PBX composition as well as ageing behaviour are presented and discussed; there are indications that removal of HMX from Bachmann RDX may lead to RS‐RDX, which retains its RS character even after ageing. 相似文献
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RDX-CMDB推进剂燃速温度敏感系数的实验研究 总被引:2,自引:0,他引:2
为了揭示RDX-CMDB推进剂中各常见组分对其燃速温度敏感系数的影响规律,制备了一系列含RDX、铝粉及燃烧催化剂的CMDB推进剂样品。采用氮气靶线法测得其在2~14MPa下的燃速温度敏感系数(σp)。讨论了RDX含量、铝粉、燃烧催化剂对RDX-CMDB推进剂燃速温度敏感系数的影响。结果表明,提高工作压强、增加RDX含量、添加燃烧催化剂均有助于降低RDX-CMDB推进剂在一定初始条件下的燃速温度敏感系数。配方中引入铝粉后可降低中低压下RDX-CMDB推进剂的燃速温度敏感系数,且燃速温度敏感系数几乎不随压强变化而变化。选用含邻苯二甲酸铅和没食子酸铋锆作燃烧催化剂,均可在2~10MPa下降低RDX-CMDB推进剂的燃速压强指数,同时降低燃速温度敏感系数。 相似文献
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