CHINESE JOURNAL OF ENERGETIC MATERIALS
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强闪光烟火药过载能力的实验研究
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霸书红(1970-),男,在读博士,从事含能药剂与材料化学研究。e-mail: bashuhong@bit.edu.cn

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Experimental Study on Over-loading of Strong Flash Pyrotechnic Composite
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    摘要:

    采用大落锤冲击装置模拟研究了强闪光烟火药的过载能力。实验结果表明: 强闪光烟火药在装药密度为1.9×103 kg·m-3,实验加载应力653 MPa,装药长度为40 mm时承受的过载为8.59×105 g (g=10 m·s-2); 在加载应力小于653 MPa范围内,强过载产生的热点不能引燃该强闪光药柱。原因可能是(1) 强闪光烟火药中氧化剂的热分解温度和可燃物的着火点很高,难以诱发反应; (2) 装药质量得到很大改善,热点产生源减少; (3) 压药过程使得KClO4和铝粉的接触面积增大,热点源产生的热量可以通过金属颗粒较迅速向其周围传递,以致热点熄灭。

    Abstract:

    Over-loading of strong flash pyrotechnic composite was studied by using drop hammer simulation device. The experimental results show that strong flash pyrotechnic composite has high over-loading ability. When charges density was 1.9×103 kg·m-3,loading stress was 653 MPa,loading length was 40 mm, loading of strong flash pyrotechnic composite was 8.59×105 g (g=10 m·s-2). When loading stress was more than 653 MPa, the hotspots produced by strong over-loading couldn′t ignite strong flash pyrotechnic composite. The reasons that strong flash pyrotechnic composite has high overloading ability are (1) thermal decomposition temperature of oxidant and ignition temperature of combustible are very high in pyrotechnic composite,the pyrotechnic reaction cannot be induced by hotspots; (2) charge flaws of pressed flash pyrotechnic composite are better improved and hotspot generation source is reduced. (3) the contact areas between KClO4 and Al are increased when strong flash pyrotechnic composite is extruded into pillar, so heat produced by hotspot generation source can rapidly be transmitted through metal particle, furthermore, hotspot is extinguished.

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霸书红,焦清介,任慧,等.强闪光烟火药过载能力的实验研究[J].含能材料, 2007, 15(2):162-164.
BA Shu-hong, JIAO Qing-jie, REN Hui, et al. Experimental Study on Over-loading of Strong Flash Pyrotechnic Composite[J]. Chinese Journal of Energetic Materials, 2007, 15(2):162-164.

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  • 收稿日期: 2006-05-16
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  • 在线发布日期: 2011-10-31
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