Szczegóły publikacji
Opis bibliograficzny
Study of amorphous alumina coatings for next-generation nuclear reactors: high-temperature in-situ and post-mortem Raman spectroscopy and X-ray diffraction / Magdalena Gawęda, Piotr JELEŃ, Agata Zaborowska, Ryszard Diduszko, Łukasz Kurpaska // Spectrochimica Acta . Part A, Molecular and Biomolecular Spectroscopy ; ISSN 1386-1425. — 2024 — vol. 321 art. no. 124680, s. 1–9. — Bibliogr. s. 8–9, Abstr. — Publikacja dostępna online od: 2024-06-19
Autorzy (5)
- Gawęda Magdalena
- AGHJeleń Piotr
- Zaborowska Agata
- Diduszko Ryszard
- Kurpaska Łukasz
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 166298 |
|---|---|
| Data dodania do BaDAP | 2026-03-11 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.saa.2024.124680 |
| Rok publikacji | 2024 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Spectrochimica Acta, Part A, Molecular and Biomolecular Spectroscopy |
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 hightemperature X-ray diffraction analyses were carried out up to 1050 degrees C on a 5 pm 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 alpha-alumina was detected with the addition of other polymorphs, gamma- and 0-Al 2 O 3 , 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.
