Highly reactive energetic films by pre-stressing nano-aluminum particles

dc.contributor.author Bello, Michael
dc.contributor.author Williams, Alan
dc.contributor.author Levitas, Valery
dc.contributor.author Tamura, Nobumichi
dc.contributor.author Levitas, Valery
dc.contributor.author Unruh, Daniel
dc.contributor.author Warzywoda, Juliusz
dc.contributor.author Pantoya, Michelle
dc.contributor.department Aerospace Engineering
dc.contributor.department Ames National Laboratory
dc.contributor.department Mechanical Engineering
dc.date 2019-12-13T20:00:59.000
dc.date.accessioned 2020-06-29T22:45:41Z
dc.date.available 2020-06-29T22:45:41Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2019
dc.date.issued 2019-12-09
dc.description.abstract <p>Energetic films were synthesized using stress altered nano-aluminum particles (nAl). The nAl powder was pre-stressed to examine how modified mechanical properties of the fuel particles influenced film reactivity. Pre-stressing conditions varied by quenching rate. Slow and rapid quenching rates induced elevated dilatational strain within the nAl particles that was measured using synchrotron X-ray diffraction (XRD). An analytical model for stress and strain in a nAl core–Al2O3 shell particle that includes creep in the shell and delamination at the core–shell boundary, was developed and used for interpretation of strain measurements. Results show rapid quenching induced 81% delamination at the particle core–shell interface also observed with Transmission Electron Microscopy (TEM). Slower quenching elevated dilatational strain without delamination. All films were prepared at approximately a 75:25 Al:poly(vinylidene fluoride) PVDF weight ratio and were 1 mm thick. A drop weight impact test was performed to assess ignition sensitivity and combustion. Stress altered nAl exhibited greater energy release rates and more complete combustion than untreated nAl, but reaction dynamics and kinetics proceeded in two different ways depending on the nAl quenching rate during pre-stressing.</p>
dc.description.comments <p>This article is published as Bello, Michael N., Alan M. Williams, Valery I. Levitas, Nobumichi Tamura, Daniel K. Unruh, Juliusz Warzywoda, and Michelle L. Pantoya. "Highly reactive energetic films by pre-stressing nano-aluminum particles." <em>RSC Advances</em> 9, no. 69 (2019): 40607-40617. DOI: <a href="http://dx.doi.org/10.1039/C9RA04871E" target="_blank">10.1039/C9RA04871E</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/aere_pubs/158/
dc.identifier.articleid 1159
dc.identifier.contextkey 15998601
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath aere_pubs/158
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/2004
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/aere_pubs/158/2019_LevitasValery_HighlyReactive.pdf|||Fri Jan 14 20:46:57 UTC 2022
dc.source.uri 10.1039/C9RA04871E
dc.subject.disciplines Materials Chemistry
dc.subject.disciplines Mechanics of Materials
dc.subject.disciplines Nanoscience and Nanotechnology
dc.subject.disciplines Structures and Materials
dc.title Highly reactive energetic films by pre-stressing nano-aluminum particles
dc.type article
dc.type.genre article
dspace.entity.type Publication
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