Ru/Al Multilayers Integrate Maximum Energy Density and Ductility for Reactive Materials

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Woll , K , Bergamaschi , A , Avchachov , K , Djurabekova , F , Gier , S , Pauly , C , Leibenguth , P , Wagner , C , Nordlund , K & Muecklich , F 2016 , ' Ru/Al Multilayers Integrate Maximum Energy Density and Ductility for Reactive Materials ' Scientific Reports , vol. 6 , 19535 . DOI: 10.1038/srep19535

Title: Ru/Al Multilayers Integrate Maximum Energy Density and Ductility for Reactive Materials
Author: Woll, K.; Bergamaschi, A.; Avchachov, K.; Djurabekova, F.; Gier, S.; Pauly, C.; Leibenguth, P.; Wagner, C.; Nordlund, K.; Muecklich, F.
Contributor: University of Helsinki, Materials Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2016-01-29
Language: eng
Number of pages: 10
Belongs to series: Scientific Reports
ISSN: 2045-2322
URI: http://hdl.handle.net/10138/162520
Abstract: Established and already commercialized energetic materials, such as those based on Ni/Al for joining, lack the adequate combination of high energy density and ductile reaction products. To join components, this combination is required for mechanically reliable bonds. In addition to the improvement of existing technologies, expansion into new fields of application can also be anticipated which triggers the search for improved materials. Here, we present a comprehensive characterization of the key parameters that enables us to classify the Ru/Al system as new reactive material among other energetic systems. We finally found that Ru/Al exhibits the unusual integration of high energy density and ductility. For example, we measured reaction front velocities up to 10.9 (+/- 0.33) ms(-1) and peak reaction temperatures of about 2000 degrees C indicating the elevated energy density. To our knowledge, such high temperatures have never been reported in experiments for metallic multilayers. In situ experiments show the synthesis of a single-phase B2-RuAl microstructure ensuring improved ductility. Molecular dynamics simulations corroborate the transformation behavior to RuAl. This study fundamentally characterizes a Ru/Al system and demonstrates its enhanced properties fulfilling the identification requirements of a novel nanoscaled energetic material.
Subject: LOW-TEMPERATURE DEFORMATION
SWISS LIGHT-SOURCE
INTERMETALLIC COMPOUNDS
EXOTHERMIC REACTIONS
GASLESS COMBUSTION
MOLECULAR-DYNAMICS
THIN-FILMS
PHASE
RUTHENIUM
PROPAGATION
114 Physical sciences
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