A multilayer solar absorber coating based on NbMoTaW refractory high entropy alloy: optical properties, thermal stability, and failure mechanism
| Autor: | Dong-Mei Yu, Shuai-Sheng Zhao, Gang Liu, Hui-Xia Guo, Xingpeng Gao, Cheng-Yu He, X.-L. Qiu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Annealing (metallurgy) Materials Science (miscellaneous) Alloy Energy Engineering and Power Technology 02 engineering and technology Nitride engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Selective surface 0104 chemical sciences Corrosion symbols.namesake Fuel Technology Nuclear Energy and Engineering Coating engineering symbols Thermal stability Composite material 0210 nano-technology Raman spectroscopy |
| Zdroj: | Materials Today Energy. 21:100789 |
| ISSN: | 2468-6069 |
| DOI: | 10.1016/j.mtener.2021.100789 |
| Popis: | The newly increasing development of abruptly high entropy alloy nitride (HEAN), especially the refractory HEAN, manifests excellent mechanical, corrosion resistance , and optical properties, which exhibits a wide application prospect in the field of coatings. Herein, we develop a high entropy nitride NbMoTaWN-based solar selective absorber coatings (SSACs), providing a potential to strengthen structural and optical advance through component selection and structure design. The coating exhibits a high solar absorptance (α) of 0.936 and a low thermal emittance ( e ) of 0.126 at 82 °C. Investigation on structural and optical robustness demonstrates that the NbMoTaW HEAN-based SSAC could endure heat treatment at 500 °C for 10 h in vacuum environment. In addition, through the evolution of XRD and Raman spectra after annealing, the failure mechanism of coatings annealed in vacuum at 500 °C for 10 h and 400 °C in air for 5 h are obtained. Obviously, the advantages such as low-cost preparation, easily scalable production, convenient technology process, and repeatability in this work promise potentially valuable applications for photothermal conversion techniques. |
| Databáze: | OpenAIRE |
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