Abstract
A set of X-ray synchrotron techniques, viz., diffraction, EXAFS/XANES spectroscopy and microtomography, is applied to elucidate microstructural changes in a technical aluminium alloy treated with GaIn eutectics. Such a treatment gives rise simultaneously to a prominent enbrittlement of the material and its activation towards reaction with water with the hydrogen evolution. The latter fact makes the activated aluminium a promising energy carrier for the small-scale hydrogen energetics. It is demonstrated that both phenomena are caused by the fast diffusion of the eutectics along intergrain boundaries and microcracks throughout the bulk of polycrystalline Al. The diffusion is promoted by the formation of (Al-Ga-In) solid solution in near-surface regions of Al crystalline grains. The progressive loss of activity of aluminium treated with GaIn eutectics upon a prolonged storage in humid air is due to the decomposition of the eutectics accompanied by the segregation of indium metal and partial gallium oxidation.
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Original Russian Text © A.I. Nizovskii, V.I. Bukhtiyarov, A.A. Veligzhanin, Y.V. Zubavichus, V.Y. Murzin, A.A. Chernyshov, A.S. Khlebnikov, R.A. Senin, I.V. Kazakov, A.A. Vorobyov, 2012, published in Kristallografiya, 2012, Vol. 57, No. 5, pp. 774–781.
On the 100th anniversary of the discovery of X-ray diffraction
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Nizovskii, A.I., Bukhtiyarov, V.I., Veligzhanin, A.A. et al. Peculiarities of aluminium interaction with Ga85In15 eutectics as evidenced by X-ray synchrotron diagnostics. Crystallogr. Rep. 57, 693–699 (2012). https://doi.org/10.1134/S1063774512050112
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DOI: https://doi.org/10.1134/S1063774512050112