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Metal‐Fluorocarbon Pyrolants. XIII: High Performance Infrared Decoy Flare Compositions Based on MgB 2 and Mg 2 Si and Polytetrafluoroethylene/Viton®

2012; Wiley; Volume: 37; Issue: 4 Linguagem: Inglês

10.1002/prep.201200044

1521-4087

Ernst‐Christian Koch, Arno Hahma, Volker Weiser, Evelin Roth, Sebastian Knapp,

Gas Dynamics and Kinetic Theory

Abstract In the presented work two experimental pyrolants for use in blackbody infrared decoy flares showing higher performance than baseline magnesium/polytetrafluoroethylene/Viton® ( MTV ) were investigated. These pyrolants are based on fuels hitherto unknown to pyrotechnics: magnesium diboride, MgB 2 , and dimagnesium silicide, Mg 2 Si. Both fuels were formulated with polytetrafluoroethylene, PTFE and a fluorocarbon binder Viton® (designated MbTV and MsTV ). MsTV yields higher radiance, L λ (W cm −2 sr −1 ) in the mid infrared range (2–5 μm) than MTV at same stoichiometry. The volumetric spectral efficiency E λ (J cm −3 sr −1 ) of MbTV is also superior to MTV. MbTV thus allows for size reduction of black body countermeasure flares and thereby has potential to enhance the survivability of aircraft in hostile environments. Due to its very high burning rate MsTV qualifies for first fire and igniter applications.