Novelties in Physics of Explosive Welding and Powder Compaction
Novelties in Physics of Explosive Welding and Powder Compaction
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DOI：
10.4028/www.scientific.net/msf.566.135
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发表时间：
2003-09
期刊：
影响因子：
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通讯作者：
I. Plaksin;J. Campos;J. Ribeiro;Ricardo Mendes;J. Direito;D. Braga;R. Prümmer
中科院分区：
文献类型：
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作者：
I. Plaksin;J. Campos;J. Ribeiro;Ricardo Mendes;J. Direito;D. Braga;R. Prümmer
爆炸（X）焊接和爆炸（X）粉末压实的广泛已知技术基于多孔复合固体或液体炸药的应用。本文介绍和讨论了X-焊接和X-粉末压实动力学的最新研究结果，并讨论了有序振荡爆轰波（DW）的概念背景下，在爆炸中观察到的所有类别的复合含能材料的协同现象，这是在LEDAP在过去八年中发现的。由振荡DW引起的规则不稳定性通过受冲击材料的界面传输，导致两个过程中的局部不稳定性和波动，形成界面波（X-焊接机制）和粉末压实的初始阶段。应用高分辨率光学探头（空间分辨率250 *m，时间分辨率1 ns，96个独立通道）允许同时登记的振荡DW在X-电荷和传输的振荡，通过飞片，焊接区。类似的测量已经在实验中与X-压实钨粉提供连续登记的冲击波速度内的压实粉末，其几何形状，它们的不稳定性和不规则性。
Widely known technologies of explosive (X) welding and explosive (X) powder compaction are based on applications of porous composite solid or liquid explosives. Recent results on dynamics of X-welding and X-powder compaction are presented and discussed in this paper in the conceptual context of an orderly oscillating detonation wave (DW), a synergetic phenomena observed in detonation of all classes of composite energetic materials, that was discovered in LEDAP in last eight years. Regular instabilities that are induced by oscillating DW, are transmitted through the interface of the impacted materials, causing the local instability and fluctuations in both processes, formation of the interfacial waves (X-welding mechanism) and in an initial phase of powder compaction. Application of high resolution optical probes (spatial resolution 250 *m, temporal resolution 1 ns, 96 independent channels) allowed the simultaneous registration of the oscillating DW in the X-charge and transmission of oscillations, trough the flyer plate, up to the welding zone. Similar measurements have been made in experiments with X-compaction of tungsten powder providing the continuous registration of shock wave velocity inside the compacted powder, its geometrical shape, their instabilities and irregularities.