Nanotwinned CoCrFeMnNi high entropy alloy films for flexible electronic device applications
| Autor: | Chun-Hway Hsueh, Cheng Wang, C.T. Liu, Ze Wang, Yilu Zhao, Ji-Jung Kai |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Toughness Materials science Alloy Fracture mechanics 02 engineering and technology Sputter deposition engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Nanocrystalline material Surfaces Coatings and Films Electrical resistivity and conductivity 0103 physical sciences Void (composites) engineering Grain boundary Composite material 0210 nano-technology Instrumentation |
| Zdroj: | Vacuum. 189:110249 |
| ISSN: | 0042-207X |
| Popis: | Designing a metal film with good toughness, high fatigue resistance and electrical resistivity is a daunting challenge for flexible electronic devices. Nanotwin strengthening is a possible way to solve this problem. Nanocrystalline CoCrFeMnNi high entropy alloy films (HEAFs) with high-density nanotwins were processed by magnetron sputtering in the present study. The films exhibited good toughness, high fatigue resistance and the electrical resistivity. The outstanding toughness could be attributed to nanotwins that constricted void initiation and crack propagation. The fatigue resistance was found to result from detwinning of nanotwins in nanograins during cyclic loading, and the high electrical resistivity was attributed to the retardation of electron movement by the high-density grain boundaries and severe lattice distortions. The findings showed that nanotwins could be used to tune the mechanical properties of HEAFs with the potential applications for flexible electronic devices in microelectromechanical systems. |
| Databáze: | OpenAIRE |
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