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A novel multilayer high temperature solar absorber coating based on high-entropy alloy NbMoTaW: Optical properties, thermal stability and corrosion properties
- Source :
- Journal of Materiomics, Vol 7, Iss 5, Pp 895-903 (2021)
- Publication Year :
- 2021
- Publisher :
- Elsevier, 2021.
-
Abstract
- With the development of new materials and technology, high entropy alloy (HEA) nitride films have attracted much attention of researchers due to their excellent optical properties and mechanical properties. Herein, a novel SS/NbMoTaWN (HEAN)/NbMoTaWON (HEAON)/SiO2 coatings are prepared, which shows a high spectral selectivity of α/e = 0.944/0.12. The preparation and optimization of the coating are studied by combining experiments with ellipsometric program and CODE software. High temperature thermal stability test is performed in depth, which proves that the coating could bear 400 °C in air for 2 h, and 600 °C for 2 h in vacuum. Long-term thermal stability researches indicate that the SSACs still keep good optical properties (α = 0.902, e = 0.106) even after annealing at 600 °C for 100 h. The failure mechanism is analyzed by XRD and Raman spectra. In addition, neutral salt spray test is performed to investigate the anti-corrosion ability, which indicates the coating has a good optical performance after soaking in 3.5 wt% NaCl solution for 30 days. Obviously, this work provides a new strategy to construct solar absorber coatings based on NbMoTaW high entropy alloy.
- Subjects :
- Materials science
Annealing (metallurgy)
Alloy
NbMoTaW
02 engineering and technology
engineering.material
Nitride
010402 general chemistry
01 natural sciences
Corrosion
Solar absorbing coating
symbols.namesake
Corrosion behavior
Coating
Salt spray test
Thermal stability
High-entropy alloy
Composite material
Materials of engineering and construction. Mechanics of materials
Optical properties
Metals and Alloys
021001 nanoscience & nanotechnology
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
engineering
symbols
TA401-492
0210 nano-technology
Raman spectroscopy
Subjects
Details
- Language :
- English
- ISSN :
- 23528478
- Volume :
- 7
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Journal of Materiomics
- Accession number :
- edsair.doi.dedup.....47a21e9c0290b3d432be22f029caccc4