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  4. Mullite photonic glasses with exceptional thermal stability for novel reflective thermal barrier coatings
 
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Mullite photonic glasses with exceptional thermal stability for novel reflective thermal barrier coatings

Citation Link: https://doi.org/10.15480/882.8580
Publikationstyp
Journal Article
Date Issued
2023-08
Sprache
English
Author(s)
Gomez Gomez, Alberto  
Keramische Hochleistungswerkstoffe M-9  
Ribas Gomes, Diego  orcid-logo
Keramische Hochleistungswerkstoffe M-9  
Winhard, Benedikt  
Keramische Hochleistungswerkstoffe M-9  
Maragno, Laura G.  
Keramische Hochleistungswerkstoffe M-9  
Krekeler, Tobias  
Betriebseinheit Elektronenmikroskopie M-26  
Ritter, Martin  orcid-logo
Betriebseinheit Elektronenmikroskopie M-26  
Pagnan Furlan, Kaline  orcid-logo
Integrated Ceramic-based Materials Systems M-EXK3  
TORE-DOI
10.15480/882.8580
TORE-URI
https://hdl.handle.net/11420/43317
Journal
Journal of Materials Science  
Volume
58
Issue
32
Start Page
12993
End Page
13008
Citation
Journal of Materials Science 58 (32): 12993-13008 (2023-08)
Publisher DOI
10.1007/s10853-023-08844-2
Scopus ID
2-s2.0-85168527362
Publisher
Springer Science + Business Media B.V.
ISSN
0022-2461
Thermal barrier coatings are essential materials systems for insulating and protecting substrates exposed to high temperatures. In such systems, the heat transfer has three possible paths: conduction, convection and irradiation. The higher the operating temperature, the more important it is to control or protect against the radiative component, since the radiative heat flux becomes non-negligible. The radiation can be controlled by the use of ceramic-based photonic nanostructures, namely photonic crystals and photonic glasses, creating so-called reflective thermal barrier coatings. In this work, mullite inverse photonic glasses (PhG) have been produced by thermally induced reaction on sol–gel-based silica structures coated with nanometric films of Al2O3 by atomic layer deposition. The conversion to mullite was carried out following a two-stage heat-treatment. The pre-annealing associated with the further mullite formation results in an excellent structural stability of these PhGs up to 1500 °C, being able to retain their high reflectivity in the near infrared range. Therefore, this structure can be considered for next-generation reflective thermal barrier coatings. Graphical abstract: [Figure not available: see fulltext.]
DDC Class
530: Physics
Funding(s)
Projekt DEAL  
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by/4.0/
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