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Title: Stress relaxation in pre-stressed aluminum core–shell particles: X-ray diffraction study, modeling, and improved reactivity

Abstract

Stress relaxation in aluminum micron-scale particles covered by alumina shell after pre-stressing by thermal treatment and storage was measured using X-ray diffraction with synchrotron radiation. Pre-stressing was produced by annealing Al particles at 573K followed by fast cooling. While averaged dilatational strain in Al core was negligible for untreated particles, it was measured at 4.40×10-5 and 2.85×10 -5 after 2 and 48 days of storage. Consistently, such a treatment leads to increase in flame propagation speed for Al+CuO mixture by 37% and 25%, respectively. Analytical model for creep in alumna shell and stress relaxation in Al core-alumina shell structure is developed and activation energy and pre-exponential multiplier are estimated. The effect of storage temperature and annealing temperature on the kinetics of stress relaxation was evaluated theoretically. These results provide estimates for optimizing Al reactivity with the holding time at annealing temperature and allowable time for storage of Al particles for various environmental temperatures.

Authors:
 [1];  [2];  [2];  [3]
+ Show Author Affiliations
  1. Iowa State Univ., Ames, IA (United States)
  2. Texas Tech Univ., Lubbock, TX (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1379536
Alternate Identifier(s):
OSTI ID: 1425683
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Combustion and Flame
Additional Journal Information:
Journal Volume: 170; Journal Issue: C; Journal ID: ISSN 0010-2180
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Levitas, Valery I., McCollum, Jena, Pantoya, Michelle L., and Tamura, Nobumichi. Stress relaxation in pre-stressed aluminum core–shell particles: X-ray diffraction study, modeling, and improved reactivity. United States: N. p., 2016. Web. doi:10.1016/j.combustflame.2016.05.012.
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Levitas, Valery I., McCollum, Jena, Pantoya, Michelle L., & Tamura, Nobumichi. Stress relaxation in pre-stressed aluminum core–shell particles: X-ray diffraction study, modeling, and improved reactivity. United States. https://doi.org/10.1016/j.combustflame.2016.05.012
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Levitas, Valery I., McCollum, Jena, Pantoya, Michelle L., and Tamura, Nobumichi. Mon . "Stress relaxation in pre-stressed aluminum core–shell particles: X-ray diffraction study, modeling, and improved reactivity". United States. https://doi.org/10.1016/j.combustflame.2016.05.012. https://www.osti.gov/servlets/purl/1379536.
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@article{osti_1379536,
title = {Stress relaxation in pre-stressed aluminum core–shell particles: X-ray diffraction study, modeling, and improved reactivity},
author = {Levitas, Valery I. and McCollum, Jena and Pantoya, Michelle L. and Tamura, Nobumichi},
abstractNote = {Stress relaxation in aluminum micron-scale particles covered by alumina shell after pre-stressing by thermal treatment and storage was measured using X-ray diffraction with synchrotron radiation. Pre-stressing was produced by annealing Al particles at 573K followed by fast cooling. While averaged dilatational strain in Al core was negligible for untreated particles, it was measured at 4.40×10-5 and 2.85×10 -5 after 2 and 48 days of storage. Consistently, such a treatment leads to increase in flame propagation speed for Al+CuO mixture by 37% and 25%, respectively. Analytical model for creep in alumna shell and stress relaxation in Al core-alumina shell structure is developed and activation energy and pre-exponential multiplier are estimated. The effect of storage temperature and annealing temperature on the kinetics of stress relaxation was evaluated theoretically. These results provide estimates for optimizing Al reactivity with the holding time at annealing temperature and allowable time for storage of Al particles for various environmental temperatures.},
doi = {10.1016/j.combustflame.2016.05.012},
journal = {Combustion and Flame},
number = C,
volume = 170,
place = {United States},
year = {Mon May 30 00:00:00 EDT 2016},
month = {Mon May 30 00:00:00 EDT 2016}
}
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Publisher's Version of Record
https://doi.org/10.1016/j.combustflame.2016.05.012
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Works referenced in this record:

Comment on “ In situ imaging of ultra-fast loss of nanostructure in nanoparticle aggregates” [J. Appl. Phys. 115 , 084903 (2014)]
journal, February 2016

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Effect of surface coatings on aluminum fuel particles toward nanocomposite combustion
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Effect of the Alumina Shell on the Melting Temperature Depression for Aluminum Nanoparticles
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Combustion velocities and propagation mechanisms of metastable interstitial composites
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Improving aluminum particle reactivity by annealing and quenching treatments: Synchrotron X-ray diffraction analysis of strain
journal, January 2016

Internal stresses in pre-stressed micron-scale aluminum core-shell particles and their improved reactivity
journal, September 2015

  • Levitas, Valery I.; McCollum, Jena; Pantoya, Michelle L.
  • Journal of Applied Physics, Vol. 118, Issue 9
  • DOI: 10.1063/1.4929642

Diffusive vs Explosive Reaction at the Nanoscale
journal, April 2010

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Evidence for the Predominance of Condensed Phase Reaction in Chemical Looping Reactions between Carbon and Oxygen Carriers
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Melt-dispersion mechanism for fast reaction of aluminum particles: Extension for micron scale particles and fluorination
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Melt dispersion mechanism for fast reaction of aluminum nano- and micron-scale particles: Flame propagation and SEM studies
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Toward design of the pre-stressed nano- and microscale aluminum particles covered by oxide shell
journal, July 2011

Pre-Stressing Micron-Scale Aluminum Core-Shell Particles to Improve Reactivity
journal, January 2015

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  • Scientific Reports, Vol. 5, Issue 1
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Flash ignition of Al nanoparticles: Mechanism and applications
journal, December 2011

Examining Hydroxyl–Alumina Bonding toward Aluminum Nanoparticle Reactivity
journal, November 2015

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Mechanochemical mechanism for fast reaction of metastable intermolecular composites based on dispersion of liquid metal
journal, April 2007

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Thermo-mechanical aspects of the heterogeneous ignition of metals
journal, May 2004

Melt dispersion versus diffusive oxidation mechanism for aluminum nanoparticles: Critical experiments and controlling parameters
journal, January 2008

  • Levitas, Valery I.; Pantoya, Michelle L.; Dikici, Birce
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Reaction Propagation of Four Nanoscale Energetic Composites (Al/MoO3, Al/WO3, Al/CuO, and B12O3)
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Time-Resolved Nanosecond Imaging of Nanoscale Condensed Phase Reaction
journal, January 2015

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    Works referencing / citing this record:

    Impact ignition and combustion of micron-scale aluminum particles pre-stressed with different quenching rates
    journal, September 2018

    • Hill, Kevin J.; Tamura, Nobumichi; Levitas, Valery I.
    • Journal of Applied Physics, Vol. 124, Issue 11
    • DOI: 10.1063/1.5044546

    The mechanical and thermal responses of colliding oxide-coated aluminum nanoparticles
    journal, April 2017

    • Ma, Bo; Zhao, Feng; Cheng, Xinlu
    • Journal of Applied Physics, Vol. 121, Issue 14
    • DOI: 10.1063/1.4980118

    Single Particle Combustion of Pre-Stressed Aluminum
    journal, May 2019

    • Hill, Kevin J.; Pantoya, Michelle L.; Washburn, Ephraim
    • Materials, Vol. 12, Issue 11
    • DOI: 10.3390/ma12111737

    Highly Reactive Prestressed Aluminum under High Velocity Impact Loading: Processing for Improved Energy Conversion
    journal, July 2019

    • Hill, Kevin J.; Pantoya, Michelle L.
    • Advanced Engineering Materials, Vol. 21, Issue 9
    • DOI: 10.1002/adem.201900492

    Highly reactive energetic films by pre-stressing nano-aluminum particles
    journal, January 2019

    • Bello, Michael N.; Williams, Alan M.; Levitas, Valery I.
    • RSC Advances, Vol. 9, Issue 69
    • DOI: 10.1039/c9ra04871e

    Single Particle Combustion of Pre-Stressed Aluminum
    journal, May 2019

    • Hill, Kevin J.; Pantoya, Michelle L.; Washburn, Ephraim
    • Materials, Vol. 12, Issue 11
    • DOI: 10.3390/ma12111737
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