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Structure and Infrared Emissivity Properties of the MAO Coatings Formed on TC4 Alloys in K(2)ZrF(6)-Based Solution
Micro-arc oxidation (MAO) ceramic coatings were formed on TC4 alloy surface in silicate and metaphosphate electrolytes based with K(2)ZrF(6) for various concentrations. X-ray diffraction (XRD), Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) were used to characterize the p...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5848951/ https://www.ncbi.nlm.nih.gov/pubmed/29414841 http://dx.doi.org/10.3390/ma11020254 |
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author | Gao, Guangrui Li, Ying Hu, Dan Xi, Zhengping |
author_facet | Gao, Guangrui Li, Ying Hu, Dan Xi, Zhengping |
author_sort | Gao, Guangrui |
collection | PubMed |
description | Micro-arc oxidation (MAO) ceramic coatings were formed on TC4 alloy surface in silicate and metaphosphate electrolytes based with K(2)ZrF(6) for various concentrations. X-ray diffraction (XRD), Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) were used to characterize the phase composition, microstructure and chemical compositions of the coatings. The infrared emissivity of the coatings was measured at 50 °C in a wavelength range of 8–20 µm. The microstructural observations all revealed the typical porousstructures. Moreover, adecline in roughness and thickness of the prepared coatings can be observed when the concentration of K(2)ZrF(6) increases. Combined with the results of XRD and XPS, it was found that all the oxides existed as the amorphous form in the coatings except the TiO(2) phase. The coatings exhibited the highest infrared emissivity value (about 0.89) when the concentration of K(2)ZrF(6) was 6 g/L, which was possibly attributed to the defect microstructure and the optimal role of ZrO(2). |
format | Online Article Text |
id | pubmed-5848951 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-58489512018-03-14 Structure and Infrared Emissivity Properties of the MAO Coatings Formed on TC4 Alloys in K(2)ZrF(6)-Based Solution Gao, Guangrui Li, Ying Hu, Dan Xi, Zhengping Materials (Basel) Article Micro-arc oxidation (MAO) ceramic coatings were formed on TC4 alloy surface in silicate and metaphosphate electrolytes based with K(2)ZrF(6) for various concentrations. X-ray diffraction (XRD), Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) were used to characterize the phase composition, microstructure and chemical compositions of the coatings. The infrared emissivity of the coatings was measured at 50 °C in a wavelength range of 8–20 µm. The microstructural observations all revealed the typical porousstructures. Moreover, adecline in roughness and thickness of the prepared coatings can be observed when the concentration of K(2)ZrF(6) increases. Combined with the results of XRD and XPS, it was found that all the oxides existed as the amorphous form in the coatings except the TiO(2) phase. The coatings exhibited the highest infrared emissivity value (about 0.89) when the concentration of K(2)ZrF(6) was 6 g/L, which was possibly attributed to the defect microstructure and the optimal role of ZrO(2). MDPI 2018-02-07 /pmc/articles/PMC5848951/ /pubmed/29414841 http://dx.doi.org/10.3390/ma11020254 Text en © 2018 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Gao, Guangrui Li, Ying Hu, Dan Xi, Zhengping Structure and Infrared Emissivity Properties of the MAO Coatings Formed on TC4 Alloys in K(2)ZrF(6)-Based Solution |
title | Structure and Infrared Emissivity Properties of the MAO Coatings Formed on TC4 Alloys in K(2)ZrF(6)-Based Solution |
title_full | Structure and Infrared Emissivity Properties of the MAO Coatings Formed on TC4 Alloys in K(2)ZrF(6)-Based Solution |
title_fullStr | Structure and Infrared Emissivity Properties of the MAO Coatings Formed on TC4 Alloys in K(2)ZrF(6)-Based Solution |
title_full_unstemmed | Structure and Infrared Emissivity Properties of the MAO Coatings Formed on TC4 Alloys in K(2)ZrF(6)-Based Solution |
title_short | Structure and Infrared Emissivity Properties of the MAO Coatings Formed on TC4 Alloys in K(2)ZrF(6)-Based Solution |
title_sort | structure and infrared emissivity properties of the mao coatings formed on tc4 alloys in k(2)zrf(6)-based solution |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5848951/ https://www.ncbi.nlm.nih.gov/pubmed/29414841 http://dx.doi.org/10.3390/ma11020254 |
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