纳米碳材料对含硼铝热剂燃烧性能的影响

doi:10.3969/j.issn.1000-1093.2019.01.006

摘要/Abstract

摘要： 为改善含硼铝热剂的燃烧性能，在B/MoO₃体系中引入纳米片状石墨、碳纳米管、还原氧化石墨烯3种纳米碳材料。利用热流法测试了含硼铝热剂的导热性能；使用高速摄像机记录了含硼铝热剂的燃烧过程，并通过计算和分析得到了燃烧速率及其变化规律；采用金属桥带进行发火试验，测试铝热剂的临界发火电流。结果表明：添加3种碳材料能显著改善B/MoO₃铝热剂的导热性能，明显提高了燃烧速率，并降低了其临界发火电流；添加还原氧化石墨烯对铝热剂的影响最为明显，使得铝热剂导热系数提高258.3%，燃烧速率提高1 756倍，临界发火电流降低27.1%，证实还原氧化石墨烯显著改善了含硼铝热剂发火阈值高的问题。

关键词: 铝热剂, 纳米碳材料, 导热性能, 燃烧速率, 临界发火电流

Abstract: Three kinds of nano-carbon materials, including nanographite flake, carbon nanotubes and reduced graphene oxide, are introduced into the system of boron/molybdenum trioxide in order to improve the combustion performance of boron-based thermite. The thermophysical properties of boron-based thermite sample were tested using a heat flux method, and their combustion processes were recorded using a high-speed camera, while the burning rates were calculated and analyzed. Then the firing test was conducted with a metal bridge for testing the critical firing current of thermite. The test results show that the addition of nanocarbon materials could improve the heat-conducting property of B/MoO₃ thermite, increase its burning rate, and reduce its critical firing current. In particular, the reduced graphene oxide is added to increase the thermal conductivity and burning rate of thermite by 258.3% and 1 756 times, respectively, and the critical firing current is reduced by 27.1%. The ignition test results of metal bridge show that the critical firing currents of thermite are decreased with maximum reduction of 27.1%. It is proved that the reduced graphene oxide has the ability to reduce the firing threshold of thermite significantly. Key

Key words: thermite, nano-carbonmaterial, thermalconductivity, burningrate, criticalfiringcurrent

中图分类号:

TJ450.4

刘洁，李含健，任慧，焦清介. 纳米碳材料对含硼铝热剂燃烧性能的影响[J]. 兵工学报, 2019, 40(1): 42-48.

LIU Jie， LI Hanjian， REN Hui， JIAO Qingjie. Influences of Nano-carbon Materials on Combustion Performance of Boron-based Thermite[J]. Acta Armamentarii, 2019, 40(1): 42-48.

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第40卷第1期
2019 年1月兵工学报ACTA
ARMAMENTARIIVol.40No.1Jan.2019

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