Heating-induced transformations of multicomponent alloys prepared by mechanochemical synthesis
| Autor: | M. S. Gusakov, S. E. Filippova, A. I. Logacheva, A. V. Logachev, V. K. Portnoi, Alexandr V. Leonov |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Diffraction Materials science General Chemical Engineering High entropy alloys Metallurgy Metals and Alloys 02 engineering and technology Laves phase 021001 nanoscience & nanotechnology 01 natural sciences Inorganic Chemistry Tetragonal crystal system Chemical engineering Phase (matter) Differential thermal analysis 0103 physical sciences Materials Chemistry Thermal stability 0210 nano-technology Solid solution |
| Zdroj: | Inorganic Materials. 53:437-446 |
| ISSN: | 1608-3172 0020-1685 |
| DOI: | 10.1134/s002016851704015x |
| Popis: | Multicomponent (Cr, Fe, Co, Ni, Al, Ti, and Nb) powder alloys prepared by milling five- to seven-component equiatomic mixtures of elemental powders in a Fritsch (P-7) planetary mill have been characterized by differential thermal analysis and X-ray diffraction. The results demonstrate that, if the starting mixture contains Al, the BCC solid solution formed as a result of the milling undergoes heating-induced CsCl-type ordering (β-phase). If not only Al but also Ti are present in the starting mixture, further heating causes the β-phase to convert to an L21 phase with the composition (Ni,Co)TiAl. The elements Cr and Fe form a tetragonal σ-phase. The presence of Nb in the starting mixture suppresses the formation of the σ- phase and favors the formation of a hexagonal Laves phase of complex composition: (Fe,Co)CrNb. |
| Databáze: | OpenAIRE |
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