Journal article
Micro-heterogeneous regimes for gasless combustion of composite materials
Combustion science and technology, v 190(5), pp 893-908
04 May 2018
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Reactive Ni/Al composite particles with different internal microstructures were fabricated by ball milling (BM). The propagation of gasless combustion waves through the compacted composite particle media was investigated using high-speed microscope video recording (HSMVR), with a resolution of 10 μm/pixel and 21.25 μs/frame. The microstructural combustion-wave characteristics, including hesitation time, propagation step size, instantaneous velocity, intraparticle reaction time, and average combustion-wave velocity, were studied as functions of measured internal microstructural parameters. The micro-heterogeneous relay-race combustion mechanism prevails across the investigated conditions. Decreasing the metal layer thicknesses in the composite particles leads to significant decrease in hesitation time, while only weakly affecting the instantaneous velocity. Characteristic times of hesitation and thermal relaxation defined two combustion front propagation regimes limited by interparticle heat transfer and by chemical reaction kinetics. Understanding the existence of these two discrete regimes allows us to effectively control the combustion parameters in this high-energy-density system.
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Details
- Title
- Micro-heterogeneous regimes for gasless combustion of composite materials
- Creators
- Joshua M. Pauls - University of Notre DameChristopher E. Shuck - University of Notre DameAlexander S. Rogachev - National University of Science and TechnologyAlexander S. Mukasyan - University of Notre DameUniv. of Notre Dame, IN (United States)
- Publication Details
- Combustion science and technology, v 190(5), pp 893-908
- Publisher
- Taylor & Francis
- Grant note
- DE-NA0002377 / National Nuclear Security Administration (10.13039/100006168) K2-2015-068 / Ministry of Education and Science of the Russian Federation (10.13039/501100003443)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000426900200009
- Scopus ID
- 2-s2.0-85043538760
- Other Identifier
- 991019296839404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Energy & Fuels
- Engineering, Chemical
- Engineering, Multidisciplinary
- Thermodynamics