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Synthesis and Characterization of Fluorite-Type La(2)Ce(2)O(7) Plasma Sprayable Powder for TBCs Application
This work focuses on the fabrication of lanthanum cerate (La(2)Ce(2)O(7), LC) powders via two chemical routes: modified Pechini sol-gel method and solid-state synthesis. The synthesized LC powders were heat treated in the temperature range of 1000–1400 °C for 6 h and investigated as a material for t...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182331/ https://www.ncbi.nlm.nih.gov/pubmed/35683305 http://dx.doi.org/10.3390/ma15114007 |
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author | Parchovianská, Ivana Parchovianský, Milan Pecušová, Beáta Hanzel, Ondrej Pakseresht, Amirhossein |
author_facet | Parchovianská, Ivana Parchovianský, Milan Pecušová, Beáta Hanzel, Ondrej Pakseresht, Amirhossein |
author_sort | Parchovianská, Ivana |
collection | PubMed |
description | This work focuses on the fabrication of lanthanum cerate (La(2)Ce(2)O(7), LC) powders via two chemical routes: modified Pechini sol-gel method and solid-state synthesis. The synthesized LC powders were heat treated in the temperature range of 1000–1400 °C for 6 h and investigated as a material for thermal barrier coating (TBC) applications. For this purpose, the powder morphology, chemical composition, crystal structure and thermal stability were studied. Scanning electron microscopy (SEM) of the synthesized powders revealed an agglomerated structure consisting of fine and uniformly distributed grains. Energy-dispersive X-ray spectroscopy (EDXS) indicated that the chemical compositions of the LC powders were similar to the stoichiometric ratio of La(2)Ce(2)O(7). A cubic fluorite structure was observed by X-ray diffraction analysis (XRD) after calcining the LC powder prepared by solid-state synthesis at 1300 °C. In contrast, there was always a fluorite structure in the LC powder synthesized by the Pechini sol-gel method after heat treatment over the entire temperature range. The thermal behavior of the LC powders was analyzed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TG) in the temperature range of 25–1300 °C. Neither an obvious mass change nor a visible energy change was observed within the tested temperature range, indicating high phase stability of the LC powder and its suitability for TBC applications. Spheroidization on the prepared LC powders was also investigated, revealing that powder size and morphology had a significant impact on the spheroidization efficiency. |
format | Online Article Text |
id | pubmed-9182331 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-91823312022-06-10 Synthesis and Characterization of Fluorite-Type La(2)Ce(2)O(7) Plasma Sprayable Powder for TBCs Application Parchovianská, Ivana Parchovianský, Milan Pecušová, Beáta Hanzel, Ondrej Pakseresht, Amirhossein Materials (Basel) Article This work focuses on the fabrication of lanthanum cerate (La(2)Ce(2)O(7), LC) powders via two chemical routes: modified Pechini sol-gel method and solid-state synthesis. The synthesized LC powders were heat treated in the temperature range of 1000–1400 °C for 6 h and investigated as a material for thermal barrier coating (TBC) applications. For this purpose, the powder morphology, chemical composition, crystal structure and thermal stability were studied. Scanning electron microscopy (SEM) of the synthesized powders revealed an agglomerated structure consisting of fine and uniformly distributed grains. Energy-dispersive X-ray spectroscopy (EDXS) indicated that the chemical compositions of the LC powders were similar to the stoichiometric ratio of La(2)Ce(2)O(7). A cubic fluorite structure was observed by X-ray diffraction analysis (XRD) after calcining the LC powder prepared by solid-state synthesis at 1300 °C. In contrast, there was always a fluorite structure in the LC powder synthesized by the Pechini sol-gel method after heat treatment over the entire temperature range. The thermal behavior of the LC powders was analyzed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TG) in the temperature range of 25–1300 °C. Neither an obvious mass change nor a visible energy change was observed within the tested temperature range, indicating high phase stability of the LC powder and its suitability for TBC applications. Spheroidization on the prepared LC powders was also investigated, revealing that powder size and morphology had a significant impact on the spheroidization efficiency. MDPI 2022-06-05 /pmc/articles/PMC9182331/ /pubmed/35683305 http://dx.doi.org/10.3390/ma15114007 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Parchovianská, Ivana Parchovianský, Milan Pecušová, Beáta Hanzel, Ondrej Pakseresht, Amirhossein Synthesis and Characterization of Fluorite-Type La(2)Ce(2)O(7) Plasma Sprayable Powder for TBCs Application |
title | Synthesis and Characterization of Fluorite-Type La(2)Ce(2)O(7) Plasma Sprayable Powder for TBCs Application |
title_full | Synthesis and Characterization of Fluorite-Type La(2)Ce(2)O(7) Plasma Sprayable Powder for TBCs Application |
title_fullStr | Synthesis and Characterization of Fluorite-Type La(2)Ce(2)O(7) Plasma Sprayable Powder for TBCs Application |
title_full_unstemmed | Synthesis and Characterization of Fluorite-Type La(2)Ce(2)O(7) Plasma Sprayable Powder for TBCs Application |
title_short | Synthesis and Characterization of Fluorite-Type La(2)Ce(2)O(7) Plasma Sprayable Powder for TBCs Application |
title_sort | synthesis and characterization of fluorite-type la(2)ce(2)o(7) plasma sprayable powder for tbcs application |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182331/ https://www.ncbi.nlm.nih.gov/pubmed/35683305 http://dx.doi.org/10.3390/ma15114007 |
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