Formation of thin foils of high-entropy CrFeCoNiCu alloys by EB-PVD process
| Autor: | V.S. Skorodzievskii, T.V. Melnychenko, A.I. Ustinov, S.A. Demchenkov, S.S. Polishchuk |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Work (thermodynamics) Materials science Alloy Evaporation 02 engineering and technology Surfaces and Interfaces General Chemistry engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Electron beam physical vapor deposition Surfaces Coatings and Films 0103 physical sciences Materials Chemistry engineering Texture (crystalline) Crystallite Composite material 0210 nano-technology FOIL method |
| Zdroj: | Surface and Coatings Technology. 403:126440 |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2020.126440 |
| Popis: | Regularities of formation of thin foils (up to 100 μm) of high-entropy alloys (HEAs) of Cr-Fe-Co-Ni-Cu system at electron beam physical vapor deposition (EB-PVD) were studied in the work. Thin foils of CrFeCoNiCu alloy were produced using a single-crucible evaporation with a constant rate of feeding of the alloy into the liquid pool. The influence of deposition temperature on the structure of the produced foils is considered. X-ray methods were used to study the phase composition and the texture of CrFeCoNiCu foils. Foils deposited at temperature below 923 K exhibit a single-FCC structure and low degree of texture. It is shown that increase in deposition temperature to 973 K leads to the transition from the foil microstructure containing almost randomly oriented nanosized crystallites separated by voided boundaries to columnar-like grains microstructure exhibiting a two-component axial 〈111〉 + 〈100〉 texture. Moreover, the increase of deposition temperature to 1023 K results in the transition into dual-FCC phase state. Effect of the structure change on mechanical properties of the deposited foils was analyzed. |
| Databáze: | OpenAIRE |
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