Mechanochemical Synthesis of Intermetallic Compounds in the Gallium–Iridium System
- Authors: Pavlov E.A.1, Chuprov I.V.1, Nikulin M.V.1, Mal’tsev E.V.1, Pshenichnaya A.A.1,2, Grigoreva T.F.3, Pastukhov E.A.4, Skuratov A.P.5, Lyakhov N.Z.3
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Affiliations:
- OAO Krasnoyarsk Plant of Nonferrous Metals Named after V. N. Gulidov
- Kirensky Institute of Physics, Federal Research Center, Siberian Branch, Russian Academy of Sciences
- Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences
- Institute of Metallurgy, Ural Branch, Russian Academy of Sciences
- Siberian Federal University
- Issue: Vol 2018, No 8 (2018)
- Pages: 728-732
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/172036
- DOI: https://doi.org/10.1134/S0036029518080141
- ID: 172036
Cite item
Abstract
The interaction between a solid inert metal (Ir) and an active liquid metal (Ga) during mechanical activation in a high-energy planetary mill is studied by X-ray diffraction and scanning electron microscopy with EDS-apparatus for high-resolution energy dispersive X-ray microanalysis. The influence of mechanical activation conditions on the formation of GaxIry intermetallic compounds and GaxIry/Ir composites and on their solubility in various acids is investigated. Being a surfactant for iridium, gallium propagates along the grain boundaries of polycrystalline iridium particles during mechanical activaiton and, hence, sharply decreases their strength. As a result of strong mechanical deformation during activation, the contact surface area between the solid and liquid metals, where the intermetallic compounds form intensely, increases sharply. As a result of treatment of the products of mechanical activaiton by a mixture of concentrated hydrochloric and nitric acids, iridium (>30%) from passes into an acid solution and forms HxIrCly complex compounds, which can interact with bases to form soluble complex salts.
About the authors
E. A. Pavlov
OAO Krasnoyarsk Plant of Nonferrous Metals Named after V. N. Gulidov
Author for correspondence.
Email: E.Pavlov@krastsvetmet.ru
Russian Federation, Krasnoyarsk, 660027
I. V. Chuprov
OAO Krasnoyarsk Plant of Nonferrous Metals Named after V. N. Gulidov
Email: grig@solid.nsc.ru
Russian Federation, Krasnoyarsk, 660027
M. V. Nikulin
OAO Krasnoyarsk Plant of Nonferrous Metals Named after V. N. Gulidov
Email: grig@solid.nsc.ru
Russian Federation, Krasnoyarsk, 660027
E. V. Mal’tsev
OAO Krasnoyarsk Plant of Nonferrous Metals Named after V. N. Gulidov
Email: grig@solid.nsc.ru
Russian Federation, Krasnoyarsk, 660027
A. A. Pshenichnaya
OAO Krasnoyarsk Plant of Nonferrous Metals Named after V. N. Gulidov; Kirensky Institute of Physics, Federal Research Center, Siberian Branch, Russian Academy of Sciences
Author for correspondence.
Email: grig@solid.nsc.ru
Russian Federation, Krasnoyarsk, 660027; Krasnoyarsk, 660036
T. F. Grigoreva
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences
Author for correspondence.
Email: grig@solid.nsc.ru
Russian Federation, Novosibirsk, 630128
E. A. Pastukhov
Institute of Metallurgy, Ural Branch, Russian Academy of Sciences
Email: grig@solid.nsc.ru
Russian Federation, Yekaterinburg, 620016
A. P. Skuratov
Siberian Federal University
Email: grig@solid.nsc.ru
Russian Federation, Krasnoyarsk, 660041
N. Z. Lyakhov
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences
Email: grig@solid.nsc.ru
Russian Federation, Novosibirsk, 630128