Initiation of thermal explosion in Ti/Al nanofoils

Temperature conditions for initiation of thermal explosion (volume reaction) in multilayer Ti/Al nanofoils were explored both experimentally and by numerical simulation. It is shown that there exists a critical heating rate below which thermal explosion of foil is not observed. Upon heating at rates...

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Bibliographic Details
Published in:International journal of self-propagating high-temperature synthesis 2015-04, Vol.24 (2), p.72-77
Main Authors: Ustinov, A. I., Kuzmenko, D. N., Kravchuk, M. V., Korol, Ya. D.
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Materials Science
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Summary:Temperature conditions for initiation of thermal explosion (volume reaction) in multilayer Ti/Al nanofoils were explored both experimentally and by numerical simulation. It is shown that there exists a critical heating rate below which thermal explosion of foil is not observed. Upon heating at rates above the critical value, the initiation temperature of thermal explosion ( T ig ) was found to decrease with increasing heating rate ( V h ). A non-monotonous dependence of T ig on V h was associated with formation of an intermetallic interlayer at the interface between Ti and Al layers in the solid-state reaction thermally induced during heating. Numerical simulation has shown that the interlayer gets thicker with decreasing heating rate, thus promoting an increase in T ig .
ISSN:1061-3862
1934-788X
DOI:10.3103/S1061386215020090