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Reactive nanolaminate pulsed-laser ignition mechanism: Modeling and experimental evidence of diffusion limited reactions

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4979578· OSTI ID:1356213
 [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
We irradiated Al/Pt nanolaminates with a bilayer thickness (tb, width of an Al/Pt pair-layer) of 164 nm with single laser pulses with durations of 10 ms and 0.5 ms at 189 W/cm2 and 1189 W/cm2, respectively. The time to ignition was measured for each pulse, and shorter ignition times were observed for the higher power/shorter pulse width. While the shorter pulse shows uniform brightness, videographic images of the irradiated area shortly after ignition show a non-uniform radial brightness for the longer pulse. A diffusion-limited single step reaction mechanism was implemented in a finite element package to model the progress from reactants to products at both pulse widths. Finally, the model captures well both the observed ignition delay and qualitative observations regarding the non-uniform radial temperature.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1356213
Alternate ID(s):
OSTI ID: 1993628
Report Number(s):
SAND2017--3199J; 652034
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 13 Vol. 121; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Engineering of Al/CuO Reactive Multilayer Thin Films for Tunable Initiation and Actuation journal May 2018
Atomistic insights into the exothermic self-sustained alloying of Al-shell/Ni-core nanoparticle triggered by laser irradiation journal January 2018
A diffusion-limited reaction model for self-propagating Al/Pt multilayers with quench limits journal April 2018
Ignition and self-propagating reactions in Al/Pt multilayers of varied design journal September 2018

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