Effects of Stepped Heating on the Initial Growth of Oxide Scales on NiCrAlHf Bond Coat Alloy under Air and Water Vapor Atmospheres

Temperature and atmosphere have a significant effect on the oxidation of MCrAlY (M = Ni, Co) bond coating. The initial growth behavior of the NiCrAlHf bond coat alloy was investigated at 1100 °C under different atmospheric conditions and using heating methods. A thick Al(2)O(3) oxide layer and large...

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Autores principales: He, Yang, Zheng, Biju, Song, Peng, Huang, Taihong, Pei, Hezhong, Yang, Bixiao, , Shakeel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9032903/
https://www.ncbi.nlm.nih.gov/pubmed/35454607
http://dx.doi.org/10.3390/ma15082914
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author He, Yang
Zheng, Biju
Song, Peng
Huang, Taihong
Pei, Hezhong
Yang, Bixiao
, Shakeel
author_facet He, Yang
Zheng, Biju
Song, Peng
Huang, Taihong
Pei, Hezhong
Yang, Bixiao
, Shakeel
author_sort He, Yang
collection PubMed
description Temperature and atmosphere have a significant effect on the oxidation of MCrAlY (M = Ni, Co) bond coating. The initial growth behavior of the NiCrAlHf bond coat alloy was investigated at 1100 °C under different atmospheric conditions and using heating methods. A thick Al(2)O(3) oxide layer and large HfO(2) particles were observed, perhaps due to metastable oxide growth at low temperatures when using stepped heating. However, in air and water vapor atmospheres, the oxide scale was thinner and the HfO(2) precipitates were smaller in stepped heating than in constant heating. The size and distribution of the HfO(2) particles might have induced different microstructures, particularly voids within the oxide scale.
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spelling pubmed-90329032022-04-23 Effects of Stepped Heating on the Initial Growth of Oxide Scales on NiCrAlHf Bond Coat Alloy under Air and Water Vapor Atmospheres He, Yang Zheng, Biju Song, Peng Huang, Taihong Pei, Hezhong Yang, Bixiao , Shakeel Materials (Basel) Article Temperature and atmosphere have a significant effect on the oxidation of MCrAlY (M = Ni, Co) bond coating. The initial growth behavior of the NiCrAlHf bond coat alloy was investigated at 1100 °C under different atmospheric conditions and using heating methods. A thick Al(2)O(3) oxide layer and large HfO(2) particles were observed, perhaps due to metastable oxide growth at low temperatures when using stepped heating. However, in air and water vapor atmospheres, the oxide scale was thinner and the HfO(2) precipitates were smaller in stepped heating than in constant heating. The size and distribution of the HfO(2) particles might have induced different microstructures, particularly voids within the oxide scale. MDPI 2022-04-15 /pmc/articles/PMC9032903/ /pubmed/35454607 http://dx.doi.org/10.3390/ma15082914 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
He, Yang
Zheng, Biju
Song, Peng
Huang, Taihong
Pei, Hezhong
Yang, Bixiao
, Shakeel
Effects of Stepped Heating on the Initial Growth of Oxide Scales on NiCrAlHf Bond Coat Alloy under Air and Water Vapor Atmospheres
title Effects of Stepped Heating on the Initial Growth of Oxide Scales on NiCrAlHf Bond Coat Alloy under Air and Water Vapor Atmospheres
title_full Effects of Stepped Heating on the Initial Growth of Oxide Scales on NiCrAlHf Bond Coat Alloy under Air and Water Vapor Atmospheres
title_fullStr Effects of Stepped Heating on the Initial Growth of Oxide Scales on NiCrAlHf Bond Coat Alloy under Air and Water Vapor Atmospheres
title_full_unstemmed Effects of Stepped Heating on the Initial Growth of Oxide Scales on NiCrAlHf Bond Coat Alloy under Air and Water Vapor Atmospheres
title_short Effects of Stepped Heating on the Initial Growth of Oxide Scales on NiCrAlHf Bond Coat Alloy under Air and Water Vapor Atmospheres
title_sort effects of stepped heating on the initial growth of oxide scales on nicralhf bond coat alloy under air and water vapor atmospheres
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9032903/
https://www.ncbi.nlm.nih.gov/pubmed/35454607
http://dx.doi.org/10.3390/ma15082914
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