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Influence of Gaseous Environment on Reaction Behavior and Phase Formation in Ti/2B Reactive Multilayer Foils

Published online by Cambridge University Press:  12 January 2012

Robert V. Reeves ,
Mark A. Rodriguez ,
Eric D. Jones Jr.  and
David P. Adams
Robert V. Reeves
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, U.S.A.
Mark A. Rodriguez
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, U.S.A.
Eric D. Jones Jr.
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, U.S.A.
David P. Adams
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, U.S.A.
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Abstract

The effects of surrounding gaseous environment on the reaction behaviors and product formation for sputter-deposited Ti/2B reactive multilayers are reported. With the surrounding environment set to different air pressures, from atmospheric conditions to 10-4 Torr, Ti/2B samples were reacted in a self-propagating mode, and the average reaction wave velocities were determined through high-speed imaging. Propagation speeds for 3.0 μm-thick multilayers were in the range of 10.89 to 0.05 m/s depending on bilayer thickness (i.e., reactant layer periodicity) and ambient pressure. X-ray diffraction analysis showed that single-phase TiB2 forms within multilayers that have small bilayer thickness. Multilayers that have a large bilayer thickness developed a mixture of TiB2, TiB and TiO2.

Keywords

energetic materialnanostructurecombustion synthesis (SHS)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1405: Symposium Y – Advances in Energetic Materials Research , 2012 , mrsf11-1405-y10-02
Copyright
Copyright © Materials Research Society 2012

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