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

Patent · Mon Jan 01 00:00:00 EST 1996

OSTI ID:870523

Weihs, Timothy ^[1]

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1. Menlo Park, CA

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, where V=K(1/D.sup.n).times.[1-(t.sub.i /D)] and n is about 0.8 to 1.2.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 5538795
• OSTI ID: 870523
• Country of Publication: United States
• Language: English

Related Subjects

ignitable
heterogeneous
stratified
structure
propagation
internal
exothermic
chemical
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expanding
wavefront
method
multilayer
selectable
propagating
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velocity
ii
initiation
temperature
attained
application
external
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iii
amount
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alternating
unreacted
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controllable
variety
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period
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reaction layer
multilayer structures
medical applications
chemical reaction
multilayer structure
propagating reaction
reaction front
particular material
front velocity
rate constant
reaction initiation
energy release
external energy
temperature attained
ignitable heterogeneous
heterogeneous stratified
initiation temperature
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