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The protectiveness of thermally grown oxides on cold sprayed CoNiCrAlY bond coat in thermal barrier coating

This paper presents the results of an oxidation behavior study for a thermal barrier coating (TBC) with air plasma sprayed yttria-stabilized zirconia top coat and CoNiCrAlY bond coat deposited using low pressure plasma spray (LPPS) and cold spray (CS). The TBC is subjected to isothermal oxidation an...

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Main Authors: Manap, A., Nakano, A., Ogawa, K.
Format: Conference Paper
Language:English
Published: 2017
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spelling my.uniten.dspace-34452017-10-26T08:26:05Z The protectiveness of thermally grown oxides on cold sprayed CoNiCrAlY bond coat in thermal barrier coating Manap, A. Nakano, A. Ogawa, K. This paper presents the results of an oxidation behavior study for a thermal barrier coating (TBC) with air plasma sprayed yttria-stabilized zirconia top coat and CoNiCrAlY bond coat deposited using low pressure plasma spray (LPPS) and cold spray (CS). The TBC is subjected to isothermal oxidation and creep tests at 900°C and evaluated using scanning electron microscopy, energy dispersive x-ray spectrometry transmission electron microscopy and electron backscatter diffraction. The thermally grown oxide (TGO) developed in the TBC with the LPPS bond coat was composed of only a-Al 2O 3 and the TGO developed in the TBC with a CS bond coat is composed of a-Al 2O 3 and c-Al 2O 3. Despite the presence of this metastable c phase, the TGO in the CS specimens exhibits a dense microstructure and lower amounts of mixed oxides. The correlation between c-Al 2O 3 and the formation of mixed oxides was investigated through the measurement of c-Al 2O 3 thickness ratio and mixed oxides coverage ratio. It was found that the mixed oxides coverage ratio is inversely proportional to the c-Al 2O 3 thickness ratio. © ASM International. 2017-10-26T08:13:14Z 2017-10-26T08:13:14Z 2012 Conference Paper 10.1007/s11666-012-9749-y en Journal of Thermal Spray Technology Volume 21, Issue 3-4, June 2012, Pages 586-596
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
language English
description This paper presents the results of an oxidation behavior study for a thermal barrier coating (TBC) with air plasma sprayed yttria-stabilized zirconia top coat and CoNiCrAlY bond coat deposited using low pressure plasma spray (LPPS) and cold spray (CS). The TBC is subjected to isothermal oxidation and creep tests at 900°C and evaluated using scanning electron microscopy, energy dispersive x-ray spectrometry transmission electron microscopy and electron backscatter diffraction. The thermally grown oxide (TGO) developed in the TBC with the LPPS bond coat was composed of only a-Al 2O 3 and the TGO developed in the TBC with a CS bond coat is composed of a-Al 2O 3 and c-Al 2O 3. Despite the presence of this metastable c phase, the TGO in the CS specimens exhibits a dense microstructure and lower amounts of mixed oxides. The correlation between c-Al 2O 3 and the formation of mixed oxides was investigated through the measurement of c-Al 2O 3 thickness ratio and mixed oxides coverage ratio. It was found that the mixed oxides coverage ratio is inversely proportional to the c-Al 2O 3 thickness ratio. © ASM International.
format Conference Paper
author Manap, A.
Nakano, A.
Ogawa, K.
spellingShingle Manap, A.
Nakano, A.
Ogawa, K.
The protectiveness of thermally grown oxides on cold sprayed CoNiCrAlY bond coat in thermal barrier coating
author_facet Manap, A.
Nakano, A.
Ogawa, K.
author_sort Manap, A.
title The protectiveness of thermally grown oxides on cold sprayed CoNiCrAlY bond coat in thermal barrier coating
title_short The protectiveness of thermally grown oxides on cold sprayed CoNiCrAlY bond coat in thermal barrier coating
title_full The protectiveness of thermally grown oxides on cold sprayed CoNiCrAlY bond coat in thermal barrier coating
title_fullStr The protectiveness of thermally grown oxides on cold sprayed CoNiCrAlY bond coat in thermal barrier coating
title_full_unstemmed The protectiveness of thermally grown oxides on cold sprayed CoNiCrAlY bond coat in thermal barrier coating
title_sort protectiveness of thermally grown oxides on cold sprayed conicraly bond coat in thermal barrier coating
publishDate 2017
_version_ 1644493539205185536
score 13.211869

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