Nanocrystalline equiatomic CoCrFeNi alloy thin films: Are they single phase fcc?
| Autor: | Christina Scheu, Matteo Ghidelli, Wenjun Lu, Alfred Ludwig, Dominique Chatain, Y. Addab, Maya K. Kini, Alan Savan, Benjamin Breitbach, Gerhard Dehm, Nathalie Bozzolo, Subin Lee |
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| Přispěvatelé: | Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Gesellschaft, Ruhr University Bochum (RUB), Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences des Procédés et des Matériaux (LSPM), Institut Galilée-Université Sorbonne Paris Cité (USPC)-Centre National de la Recherche Scientifique (CNRS)-Université Sorbonne Paris Nord, Centre de Mise en Forme des Matériaux (CEMEF), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Mines Paris - PSL (École nationale supérieure des mines de Paris), ANR-16-CE92-0015,AHEAD,Analyse de la stabilité d'alliages à haute entropie par démouillage de films minces(2016) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Annealing (metallurgy) Alloy Nucleation FOS: Physical sciences 02 engineering and technology engineering.material 01 natural sciences Sputtering 0103 physical sciences Materials Chemistry Thin film Composite material 010302 applied physics Condensed Matter - Materials Science High entropy alloys Materials Science (cond-mat.mtrl-sci) Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Nanocrystalline material Surfaces Coatings and Films engineering [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] 0210 nano-technology |
| Zdroj: | Surface and Coatings Technology Surface and Coatings Technology, Elsevier, 2021, pp.126945. ⟨10.1016/j.surfcoat.2021.126945⟩ Surface and Coatings Technology, 2021, pp.126945. ⟨10.1016/j.surfcoat.2021.126945⟩ |
| ISSN: | 0257-8972 1879-3347 |
| Popis: | International audience; The bulk quaternary equiatomic CoCrFeNi alloy is studied extensively in literature. Under experimental conditions, it shows a single-phase fcc structure and its physical and mechanical properties are similar to those of the quinary equiatomic CoCrFeMnNi alloy. Many studies in literature have focused on the mechanical properties of bulk nanocrystalline high entropy alloys or compositionally complex alloys, and their microstructure evolution upon annealing. The thin film processing route offers an excellent alternative to form nanocrystalline alloys. Due to the high nucleation rate and high density of defects in thin films synthesized by sputtering, the kinetics of microstructure evolution is often accelerated compared to those taking place in the bulk. Here, thin films are used to study the phase evolution in nanocrystalline CoCrFeNi deposited on Si/SiO 2 and c-sapphire substrates by magnetron cosputtering from elemental sources. The phases and microstructure of the films are discussed in comparison to the bulk alloy. The main conclusion is that second phases can form even at room temperature provided there are sufficient nucleation sites. |
| Databáze: | OpenAIRE |
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