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Article
Internal stresses in pre-stressed micron-scale aluminum core-shell particles and their improved reactivity
Journal of Applied Physics
  • Valery I. Levitas, Iowa State University
  • Jena McCollum, Texas Tech University
  • Michelle L. Pantoya, Texas Tech University
  • Nobumichi Tamura, Lawrence Berkeley National Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
1-1-2015
DOI
10.1063/1.4929642
Abstract
Dilatation of aluminum (Al) core for micron-scale particles covered by alumina (Al2O3) shell was measured utilizing x-ray diffraction with synchrotron radiation for untreated particles and particles after annealing at 573 K and fast quenching at 0.46 K/s. Such a treatment led to the increase in flame rate for Al + CuO composite by 32% and is consistent with theoretical predictions based on the melt-dispersion mechanism of reaction for Al particles. Experimental results confirmed theoretical estimates and proved that the improvement of Al reactivity is due to internal stresses. This opens new ways of controlling particle reactivity through creating and monitoring internal stresses.
Comments

This article is published as Levitas, Valery I., Jena McCollum, Michelle L. Pantoya, and Nobumichi Tamura. "Internal stresses in pre-stressed micron-scale aluminum core-shell particles and their improved reactivity." Journal of Applied Physics 118, no. 9 (2015): 094305. doi: 10.1063/1.4929642. Posted with permission.

Copyright Owner
AIP Publishing LLC.
Language
en
File Format
application/pdf
Citation Information
Valery I. Levitas, Jena McCollum, Michelle L. Pantoya and Nobumichi Tamura. "Internal stresses in pre-stressed micron-scale aluminum core-shell particles and their improved reactivity" Journal of Applied Physics Vol. 118 Iss. 9 (2015) p. 094305
Available at: http://works.bepress.com/valery_levitas/76/