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Suitability of various complex hydrides for foaming aluminum alloys

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Abstract

Some hydrides that could replace TiH2 as the hitherto most suitable blowing agent for foaming aluminum alloys were investigated. Hydrides taken from the group MBH4 (M = Li, Na, K) and LiAlH4 were selected since these have not been studied in the past although their decomposition characteristics appear to be suitable. Foamable precursors of alloy AlSi8Mg4 were manufactured by pressing blends of metal and blowing agent powders. Powders, precursors and precursor filings were studied by mass spectrometry to obtain the hydrogen desorption profile. Foaming experiments were conducted with simultaneous x-ray radiographic monitoring. Two Li-containing blowing agents were found to perform well and can be considered alternatives to TiH2.

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Authors and Affiliations

  1. Structure and Properties of Materials, Technical University Berlin, 10623, Berlin, Germany

    Paul H. Kamm

  2. Institute of Applied Materials, Helmholtz Centre Berlin, 14109, Berlin, Germany

    Francisco García-Moreno, Catalina Jiménez & John Banhart

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  1. Paul H. Kamm
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  2. Francisco García-Moreno
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  3. Catalina Jiménez
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  4. John Banhart
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Correspondence to Francisco García-Moreno.

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Kamm, P.H., García-Moreno, F., Jiménez, C. et al. Suitability of various complex hydrides for foaming aluminum alloys. Journal of Materials Research 28, 2436–2443 (2013). https://doi.org/10.1557/jmr.2013.110

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  • DOI: https://doi.org/10.1557/jmr.2013.110

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