An experimental study was conducted in which aluminum hydride (alane, AlH 3 ) replaced nanoaluminum incrementally as a fuel in a nanocomposite thermite based on CuO, Bi 2 O 3 , and Fe 2 O 3 . Pressure cell and burn tube experiments demonstrated enhancements in absolute pressure, pressurization rate, and burning velocity when micron-scale aluminum hydride was used as a minor fuel component in a nanoaluminum–copper-oxide thermite mixture. Peak pressurization rates were found when the aluminum hydride made up about 25% of the fuel by mole. Pressurization rates increase by a factor of about two with the addition of AlH 3 , whereas burn tube velocities increase by about 25%. The enhancement in pressurization rate appears to primarily be a result of the increased pressure associated with the AlH 3 decomposition in the nanocomposite thermite system and an enhancement in convective heat transfer. Similar experiments were conducted with micron-scale aluminum in place of the aluminum hydride, which resulted in a reduction of all the previously mentioned parameters with respect to the baseline nanoaluminum–copper-oxide thermite. The addition of any amount of alane to iron oxide based thermite resulted in a reduction in performance in pressure cell testing. The performance of Bi 2 O 3 based thermite was largely unaffected by alane until alane became the majority fuel component. These results have been found to correlate with changes in the combustion mechanism through equilibrium calculations.


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    Titel :

    Aluminum Hydride as a Fuel Supplement to Nanothermites


    Beteiligte:
    Young, G. (Autor:in) / Sullivan, K. (Autor:in) / Piekiel, N. (Autor:in) / Zachariah, M. R. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2013-12-31


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





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