Self-propagating high-temperature synthesis of intermetallide/oxide nanocomposite powders using mechanocomposite precursors |
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Authors: | T L Talako T F Grigor’eva A I Letsko A P Barinova P A Vityaz’ N Z Lyakhov |
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Affiliation: | (1) Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA;(2) Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 043 53 Kosice, Slovakia;(3) Institute of General and Inorganic Chemistry, National Academy of Science, 2-tup, 10 Argutyan Street, Yerevan, 375051, Armenia |
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Abstract: | It was found that mechanical activation of a mixture containing iron, aluminum, and oxide iron resulted in mechanochemical
reduction of iron oxide and formation of a Fe/Al/Al2O3 nanostructural mechanocomposite. High-temperature self-propagating synthesis (SHS) using this composite as a precursor yielded
a FeAl/Al2O3 composite, which retained the morphology and dimensional characteristics of the precursor. During mechanical activation of
a mixture of iron, aluminum, and chromium oxide, complete reduction of the latter did not occur but SHS also led to the formation
of an intermetallide/oxide nanocomposite, in which chromium atoms were incorporated in the structure of iron aluminide. |
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