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Sanchez-Perez M, Rojas TC, Reyes DF, Ferrer FJ, Farchado M, Morales A, Escobar-Galindo R, Sanchez-Lopez JC. Synthesis and Characterization of Multilayered CrAlN/Al 2O 3 Tandem Coating Using HiPIMS for Solar Selective Applications at High Temperature. ACS Appl Energy Mater 2024; 7:438-449. [PMID: 38273967 PMCID: PMC10806925 DOI: 10.1021/acsaem.3c02310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/04/2023] [Accepted: 12/04/2023] [Indexed: 01/27/2024]
Abstract
The effect of applying a negative bias during deposition of a previously designed multilayer solar selective absorber coating was studied on two types of substrates (316L stainless steel and Inconel 625). The solar selective coating is composed of different chromium aluminum nitride layers deposited using a combination of radiofrequency (RF), direct current (DC), and high-power impulse magnetron sputtering (HiPIMS) technologies. The chemical composition is varied to generate an infrared reflective/absorber layer (with low Al addition and N vacancies) and two CrAlN intermediate layers with medium and high aluminum content (Al/Cr = 0.6 and 1.2). A top aluminum oxide layer (Al2O3) is deposited as an antireflective layer. In this work, a simultaneous DC-pulsed bias (-100 V, 250 kHz) was applied to the substrates in order to increase the film density. The optical performance, thermal stability, and oxidation resistance was evaluated and compared with the performance obtained with similar unbiased coating and a commercial Pyromark paint reference at 600, 700, and 800 °C. The coating remained stable after 200 h of annealing at 600 °C, with solar absorptance (α) values of 93% and 92% for samples deposited on stainless steel and Inconel, respectively, and a thermal emittance ε25°C of 18%. The introduction of additional ion bombardment during film growth through bias assistance resulted in increased durability, thermal stability, and working temperature limits compared with unbiased coatings. The solar-to-mechanical energy conversion efficiency at 800 °C was found to be up to 2 times higher than Pyromark at C = 100 and comparable at C = 1000.
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Affiliation(s)
- Miriam Sanchez-Perez
- Instituto
de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla), Avda. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - Teresa Cristina Rojas
- Instituto
de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla), Avda. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - Daniel F. Reyes
- Instituto
de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla), Avda. Américo Vespucio 49, E-41092 Sevilla, Spain
- University
Research Institute on Electron Microscopy and Materials (IMEYMAT), Universidad de Cádiz, E-11510 Puerto Real (Cádiz), Spain
| | - F. Javier Ferrer
- Centro
Nacional de Aceleradores (Univ. Sevilla, CSIC, and Junta de Andalucía), Avda. Tomás A. Edison 7, E-41092 Sevilla, Spain
- Departamento
de Física Atómica, Molecular y Nuclear, Universidad de Sevilla, Aptdo 1065, E-41012 Sevilla, Spain
| | - Meryem Farchado
- CIEMAT-PSA,
Materials for Concentrating Solar Thermal Technologies Unit, Avenida Complutense 40, E-28040 Madrid, Spain
| | - Angel Morales
- CIEMAT-PSA,
Materials for Concentrating Solar Thermal Technologies Unit, Avenida Complutense 40, E-28040 Madrid, Spain
| | - Ramon Escobar-Galindo
- Departamento
de Física Aplicada I, Escuela Politécnica Superior, Universidad de Sevilla, Virgen de África 7, E-41011 Sevilla, Spain
| | - Juan Carlos Sanchez-Lopez
- Instituto
de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla), Avda. Américo Vespucio 49, E-41092 Sevilla, Spain
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