English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/181868
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Directionally solidified Al2O3-ME3Al5O12 (ME: Y, Er and Yb) eutectic coatings for thermophotovoltaic systems

AuthorsOliete, Patricia B.; López-Robledo, M. J.; Peña, J. I.; Silva-Treviño, J.
KeywordsLaser remelting
Al2O3/ME3Al5O12
Eutectic coating
Selective emitters
Thermophotovoltaic converters
Issue Date2017
PublisherElsevier
CitationCeramics International 43(18): 16270-16275 (2017)
AbstractSelective emitters for thermophotovoltaic systems consisting of directionally solidified Al2O3-ME3Al5O12 (ME: Y, Er and Yb) eutectic coatings on Al2O3 substrates were produced and characterizated. Coatings were deposited by dip-coating on cylindrical substrates. After sintering, a continuous-wave CO2 laser was used to produce the surface resolidification. The optimization of the processing parameters yielded dense eutectic coatings with good adhesion to the substrate and with 90–200 µm in thickness. All coatings were free of voids and showed a eutectic microstructure consisting of a three dimensional interpenetrated network of Al2O3 and ME3Al5O12. The mechanical properties of the coatings (hardness and fracture toughness) were evaluated by indentation techniques. Thermal emission was studied by heating the rods with a CO2 laser at temperatures between 1000 and 1400 °C. Selective emission was observed in Er3+ and Yb3+ based coatings and attributed to the electronic transitions of the rare earth ions. Er3+-coatings showed the best emission properties as selective emitters for thermophotovoltaic converters.
Publisher version (URL)https://doi.org/10.1016/j.ceramint.2017.08.212
URIhttp://hdl.handle.net/10261/181868
DOI10.1016/j.ceramint.2017.08.212
ISSN0272-8842
E-ISSN1873-3956
Appears in Collections:(ICMA) Artículos
Files in This Item:
File Description SizeFormat 
directsystem.pdf996,66 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.