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Study of amorphous alumina coatings for next-generation nuclear reactors: High-temperature in-situ and post-mortem Raman spectroscopy and X-ray diffraction.
Gaweda, Magdalena; Jelen, Piotr; Zaborowska, Agata; Diduszko, Ryszard; Kurpaska, Lukasz.
Afiliación
  • Gaweda M; NOMATEN CoE, NOMATEN MAB, National Centre for Nuclear Research, A. Soltana 7 Str., 05-400 Otwock-Swierk, Poland. Electronic address: Magdalena.Gaweda@ncbj.gov.pl.
  • Jelen P; Faculty of Materials Science and Ceramics, AGH University of Kraków, A. Mickiewicza 30 Av, 30-059 Kraków, Poland.
  • Zaborowska A; NOMATEN CoE, NOMATEN MAB, National Centre for Nuclear Research, A. Soltana 7 Str., 05-400 Otwock-Swierk, Poland.
  • Diduszko R; NOMATEN CoE, NOMATEN MAB, National Centre for Nuclear Research, A. Soltana 7 Str., 05-400 Otwock-Swierk, Poland; Institute of Microelecotronic and Fotonics, Lukasiewicz Research Network, Wólczynska 133 Str., 01-919 Warsaw, Poland.
  • Kurpaska L; NOMATEN CoE, NOMATEN MAB, National Centre for Nuclear Research, A. Soltana 7 Str., 05-400 Otwock-Swierk, Poland.
Spectrochim Acta A Mol Biomol Spectrosc ; 321: 124680, 2024 Nov 15.
Article en En | MEDLINE | ID: mdl-38963950
ABSTRACT
The present work focuses on the investigation of the thermal stability and structural integrity of amorphous alumina coatings intended for use as protective coatings on cladding tubes in Generation IV nuclear reactors, specifically in the Lead-cooled Fast Reactor (LFR) type. High-temperature Raman spectroscopy and high-temperature X-ray diffraction analyses were carried out up to 1050 °C on a 5 µm coating deposited by the pulsed laser deposition (PLD) technique on a 316L steel substrate. The experiments involved the in-situ examination of structural changes in the material under increasing temperature, along with ex-situ Raman imaging of the surface and cross-section of the coating after thermal treatments of different lengths. As it was expected, the presence of α-alumina was detected with the addition of other polymorphs, γ- and θ-Al2O3, found in the material after longer high-temperature exposure. The use of two structural analysis methods and two lasers excitation wavelengths with Raman spectroscopy allowed us to detect all the mentioned phases despite different mode activity. Alumina analysis was based on the emission spectra, while substrate oxidation products were identified through the structural bands. The experiments depicted a dependence of the phase composition of oxidation products and alumina's degree of crystallization on the length of the treatment. Nevertheless, the observed structural changes did not occur rapidly, and the coating's integrity remained intact. Moreover, oxidation signs occurred locally at temperatures exceeding the LFR reactor's working temperature, confirming the material's great potential as a protective coating in the operational conditions of LFR nuclear reactors.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Spectrochim Acta A Mol Biomol Spectrosc Asunto de la revista: BIOLOGIA MOLECULAR Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Spectrochim Acta A Mol Biomol Spectrosc Asunto de la revista: BIOLOGIA MOLECULAR Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido