Pre-Stressing Micron-Scale Aluminum Core-Shell Particles to Improve Reactivity

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dc.contributor.author Levitas, Valery
dc.contributor.author McCollum, Jena
dc.contributor.author Pantoya, Michelle
dc.contributor.author Levitas, Valery
dc.contributor.department Aerospace Engineering
dc.contributor.department Ames Laboratory
dc.contributor.department Mechanical Engineering
dc.contributor.department Materials Science and Engineering
dc.date 2018-02-19T00:59:52.000
dc.date.accessioned 2020-06-29T22:46:23Z
dc.date.available 2020-06-29T22:46:23Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2015
dc.date.issued 2015-01-01
dc.description.abstract <p>The main direction in increasing reactivity of aluminum (Al) particles for energetic applications is reduction in their size down to nanoscale. However, Al nanoparticles are 30–50 times more expensive than micron scale particles and possess safety and environmental issues. Here, we improved reactivity of Al <em>micron</em> scale particles by synthesizing pre-stressed core-shell structures. Al particles were annealed and quenched to induce compressive stresses in the alumina passivation shell surrounding Al core. This thermal treatment was designed based on predictions of the melt-dispersion mechanism (MDM); a theory describing Al particle reaction under high heating rate. For all anneal treatment temperatures, experimental flame propagation rates for Al combined with nanoscale copper oxide (CuO) are in quantitative agreement with the theoretical predictions based on the MDM. The best treatment increases flame rate by 36% and achieves 68% of that for the best Al nanoparticles.</p>
dc.description.comments <p>This article is published as Levitas, Valery I., Jena McCollum, and Michelle Pantoya. "Pre-stressing micron-scale aluminum core-shell particles to improve reactivity." Scientific reports 5 (2015). <a href="http://dx.doi.org/10.1038" target="_blank">10.1038/srep07879</a></p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/aere_pubs/97/
dc.identifier.articleid 1099
dc.identifier.contextkey 10975684
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath aere_pubs/97
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/2101
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/aere_pubs/97/2015_Levitas_PrestressingMicron.pdf|||Sat Jan 15 02:36:41 UTC 2022
dc.source.uri 10.1038/srep07879
dc.subject.disciplines Aerospace Engineering
dc.subject.disciplines Structures and Materials
dc.title Pre-Stressing Micron-Scale Aluminum Core-Shell Particles to Improve Reactivity
dc.type article
dc.type.genre article
dspace.entity.type Publication
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