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Ignitable heterogeneous stratified structure for the propagation of an internal exothermic chemical reaction along an expanding wavefront and method making same

机译:用于内部放热化学反应沿扩展波前传播的可燃非均质分层结构及其制备方法

摘要

A multilayer structure has a selectable, (i) propagating reaction front velocity V, (ii) reaction initiation temperature attained by application of external energy and (iii) amount of energy delivered by a reaction of alternating unreacted layers of the multilayer structure. Because V is selectable and controllable, a variety of different applications for the multilayer structures are possible, including but not limited to their use as ignitors, in joining applications, in fabrication of new materials, as smart materials and in medical applications and devices. The multilayer structure has a period D, and an energy release rate constant K. Two or more alternating unreacted layers are made of different materials and separated by reacted zones. The period D is equal to a sum of the widths of each single alternating reaction layer of a particular material, and also includes a sum of reacted zone widths, t.sub.i, in the period D. The multilayer structure has a selectable propagating reaction front velocity V, whereP PV=K(1/D.sup.n)×[1-(t.sub.i /D)]PPand n is about 0.8 to 1.2.
机译:多层结构具有可选择的(i)传播反应前沿速度V,(ii)通过施加外部能量达到的反应起始温度,和(iii)通过多层结构的未反应层的交替反应传递的能量。因为V是可选择和可控制的,所以多层结构的各种不同应用是可能的,包括但不限于它们用作点火器,在接合应用中,在新材料的制造中,在智能材料中以及在医疗应用和设备中。该多层结构具有周期D和能量释放速率常数K。两个或多个交替的未反应层由不同的材料制成并且由反应区分开。周期D等于特定材料的每个单个交替反应层的宽度之和,并且还包括在周期D中的反应区宽度之和t.sub.i。多层结构具有可选择的传播反应前沿速度V,其中

V = K(1 / D sn)× [1-(t.i / D)]

,n约为0.8至1.2。

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