Formation of Au-Co solid solutions via mechanical alloying at room and low temperatures according to X-ray diffraction data
Alloys of the gold-cobalt system characterized by limited solubility have been synthesized by the high-pressure torsion method. According to the data of X-ray diffraction analysis it was revealed that as a result of mechanical alloying, a phase of a supersaturated solid solution based on gold is formed in the composition of the alloy. Lowering the temperature to cryogenic leads to a redistribution of dissolved cobalt. These results to increase its concentration in the solid solution composition. The solid solution phase is in an ultrafine-grained state. Possible mechanisms for the formation of a supersaturated solid solution in the gold-cobalt system are discussed, taking into account the specific features of the severe plastic deformation and mechanical alloying processes.
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Keywords
mechanical alloying, severe plastic deformation, high-pressure torsion, supersaturated solid solution Au-Co, ultrafine-grained materials, x-ray diffractometry analysis, cryodeformationAuthors
| Name | Organization | |
| Tolmachev T.P. | Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences; M.N. Miheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences | tol-machev@imp.uran.ru |
| Patselov A.M. | M.N. Miheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences | patselov@imp.uran.ru |
| Pilyugin V.P. | M.N. Miheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences; Ural Federal University (UrFU) | pilyugin@imp.uran.ru |
| Solov’eva Yu.V. | Tomsk State University of Architecture and Building | j_sol@mail.ru |
| Churbaev R.V. | M.N. Miheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences | churbaev@imp.uran.ru |
| Plotnikov A.V. | M.N. Miheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences | plotnikov@imp.uran.ru |
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