Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD

La(2)Zr(2)O(7) coatings are promising candidates to substitute YSZ coatings in advanced gas turbine engines. In this work, Sm-doped La(2)Zr(2)O(7) coatings were deposited by physical vapor deposition. This work focuses on the crystal structure, thermal conductivity, thermal expansion coefficient, mo...

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Autores principales: Shen, Zaoyu, Liu, Guanxi, Zhang, Rujing, Dai, Jianwei, He, Limin, Mu, Rende
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8983386/
https://www.ncbi.nlm.nih.gov/pubmed/35402886
http://dx.doi.org/10.1016/j.isci.2022.104106
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author Shen, Zaoyu
Liu, Guanxi
Zhang, Rujing
Dai, Jianwei
He, Limin
Mu, Rende
author_facet Shen, Zaoyu
Liu, Guanxi
Zhang, Rujing
Dai, Jianwei
He, Limin
Mu, Rende
author_sort Shen, Zaoyu
collection PubMed
description La(2)Zr(2)O(7) coatings are promising candidates to substitute YSZ coatings in advanced gas turbine engines. In this work, Sm-doped La(2)Zr(2)O(7) coatings were deposited by physical vapor deposition. This work focuses on the crystal structure, thermal conductivity, thermal expansion coefficient, morphology, composition, and thermal durability of LaSmZrO coatings. The LaSmZrO ceramics exhibit low thermal conductivity (1.69 W/mK at 800°C) and high thermal expansion coefficient (9.72∗10(−6) K(−1) at 1500°C) compared with La(2)Zr(2)O(7). The LaSmZrO/YSZ coatings with feathery microstructure show relatively good thermal durability (8183 cycles or 856 h) under high temperature. The broken regions are observed at the ceramic coating/bond coating interface. The failure behaviors are relevant with crack evolution and thermally grown oxide growth. This work might guide the investigation of advanced coatings under high temperature.
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spelling pubmed-89833862022-04-07 Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD Shen, Zaoyu Liu, Guanxi Zhang, Rujing Dai, Jianwei He, Limin Mu, Rende iScience Article La(2)Zr(2)O(7) coatings are promising candidates to substitute YSZ coatings in advanced gas turbine engines. In this work, Sm-doped La(2)Zr(2)O(7) coatings were deposited by physical vapor deposition. This work focuses on the crystal structure, thermal conductivity, thermal expansion coefficient, morphology, composition, and thermal durability of LaSmZrO coatings. The LaSmZrO ceramics exhibit low thermal conductivity (1.69 W/mK at 800°C) and high thermal expansion coefficient (9.72∗10(−6) K(−1) at 1500°C) compared with La(2)Zr(2)O(7). The LaSmZrO/YSZ coatings with feathery microstructure show relatively good thermal durability (8183 cycles or 856 h) under high temperature. The broken regions are observed at the ceramic coating/bond coating interface. The failure behaviors are relevant with crack evolution and thermally grown oxide growth. This work might guide the investigation of advanced coatings under high temperature. Elsevier 2022-03-17 /pmc/articles/PMC8983386/ /pubmed/35402886 http://dx.doi.org/10.1016/j.isci.2022.104106 Text en © 2022 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Shen, Zaoyu
Liu, Guanxi
Zhang, Rujing
Dai, Jianwei
He, Limin
Mu, Rende
Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD
title Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD
title_full Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD
title_fullStr Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD
title_full_unstemmed Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD
title_short Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD
title_sort thermal property and failure behavior of lasmzro thermal barrier coatings by eb-pvd
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8983386/
https://www.ncbi.nlm.nih.gov/pubmed/35402886
http://dx.doi.org/10.1016/j.isci.2022.104106
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