In this work the complex experimental investigation of the microstructure and burning parameters of HMX-monopropellant (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) and HMX/Al binary systems was conducted with micro-sized and ultrafine components. Initial powders, their mixtures, compact pressed samples, and the combustion products collected from a burning surface by QPCB (quench particle collection bomb) technique were investigated. Morphology, chemical state and particle size were examined by atomic-force microscopy (AFM), scanning electron microscopy (SEM), BET-analysis and simultaneous DSC/TG-analysis. Microscopy reveals particles of micro-sized and ultrafine aluminium to be spherical with an average volume diameter 3.3 micron and 180 nm, respectively. It was shown, that HMX-monopropellant burning rate is independent on the particle size in the pressure range 20-100 atm. Two mixing technologies to prepare binary HMX/Al compositions were applied: (i) conventional 'dry' mixing and (ii) 'wet' technique with ultrasonic processing in diethyl ether. BET analysis reveals that specific surface area is almost identical for both mixing types. Applying ultrasonic technique results in a burning rate increase up to 15-20% comparing to 'dry' mixing (under initial pressure 60 atm). The highest burning rate (34 mm/s) was determined for composition with ultrafine aluminium and micro-sized HMX. Influences of the component size and the composition microstructure on the burning rate of energetic systems are discussed and analyzed


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    Titel :

    Particle size and mixing technology influence on combustion of HMX/Al compositions


    Weitere Titelangaben:

    Einfluss von Teilchengröße und Mischtechnik auf die Verbrennung von HMX/Al-Mischungen


    Beteiligte:
    Muravyev, N. (Autor:in) / Frolov, Y. (Autor:in) / Pivkina, Alla (Autor:in) / Monogarov, K. (Autor:in) / Ivanov, D. (Autor:in) / Meerov, D. (Autor:in) / Ordzhonikidze, Olga (Autor:in)


    Erscheinungsdatum :

    2009


    Format / Umfang :

    13 Seiten, 13 Bilder, 3 Tabellen, 19 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch