Hot Spot Histories in Energetic Materials
Hot Spot Histories in Energetic Materials
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DOI：
10.1557/proc-296-293
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发表时间：
1995-04
期刊：
影响因子：
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通讯作者：
A. Mellor;D. Wiegand;K. Isom
中科院分区：
文献类型：
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作者：
A. Mellor;D. Wiegand;K. Isom
人们对热点增长到持续反应或熄灭的机制感兴趣，因为观察到点燃推进剂或炸药所需的能量可能显著低于将测试样品均匀加热到其点火温度所需的能量。这一结果与非热能的原始形式无关，并已用于解释冲击、撞击、摩擦和静电放电(ESD)刺激的数据。我们给出了新的流程图，其中包括1)导致热点形成的事件和2)导致持续反应或猝灭的后续路径。这一机制似乎能够分类和展示热点增长或猝灭、冲击和ESD刺激之间的异同。样本限制、温度和刺激持续时间是自变量，其作用在机制中特别明确。
Interest in the mechanisms by which hot spots either grow to sustained reaction or are quenched results from the observation that the energy required to ignite a propellant or explosive can be significantly less than that needed to bulk heat a test specimen uniformly to its ignition temperature. This result is independent of the original form of non-thermal energy and has been used to interpret data for shock, impact, friction and electrostatic discharge (ESD) stimuli. We present new flowcharts which include 1) events resulting in hot spot formation and 2) subsequent pathways which lead to sustained reaction or quenching. The mechanism appears capable of categorizing and demonstrating the similarities and differences between hot spot growth or quenching, for impact and ESD stimuli. Sample confinement and temperature and stimulus duration are the independent variables whose roles are particularly clarified in the mechanism.