Conditions for combustion synthesis in nanosized Ni/Al films on a substrate

The conditions for self-sustaining combustion synthesis in nanosized multilayer Ni/Al films deposited on a substrate are studied based on a 2D model. The model considers two conjugate processes, i.e. propagation of the synthesis wave in a multi-layer Ni/Al system and propagation of the accompanying...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2007-04, Vol.392 (1), p.272-280
Main Authors: Rabinovich, O.S., Grinchuk, P.S., Andreev, M.A., Khina, B.B.
Format: Article
Language:English
Subjects:
Combustion synthesis
Cross-disciplinary physics: materials science
rheology
Diffusion kinetics
Exact sciences and technology
Materials science
Nanoscale materials and structures: fabrication and characterization
Nanosized films
Other topics in nanoscale materials and structures
Physics
Substrate
Synthesis regimes
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Summary:The conditions for self-sustaining combustion synthesis in nanosized multilayer Ni/Al films deposited on a substrate are studied based on a 2D model. The model considers two conjugate processes, i.e. propagation of the synthesis wave in a multi-layer Ni/Al system and propagation of the accompanying thermal wave into the substrate. It is shown that the boundary between the regimes of self-sustaining reaction and annealing is determined by the number of binary layers of reactants (at a given heater temperature, stoichiometric ratio of the reactants and ration of film and substrate thermal diffusivities), but it does not depend on the bilayer thickness. The distinctive features of synthesis in the thermal explosion mode and in the annealing regime are studied as well.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2006.11.032