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The role of formation of continues thermally grown oxide layer on the nanostructured NiCrAlY bond coat during thermal exposure in air

In recent years, the life expectancy of thermal barrier coatings is expected to be improved by applying the nanostructured NiCrAlY bond coat. The present paper reviews the main technique used in the synthesis of nano-crystalline NiCrAlY powders using a planetary ball mill and investigates the micros...

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Main Authors: Daroonparvar, Mohammadreza, Hussain, Mohammad Sakhawat, Mat Yajid, Muhammad Azizi
Format: Article
Published: Elsevier 2012
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/33896/
http://dx.doi.org/10.1016/j.apsusc.2012.08.002
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spelling my.utm.338962018-11-30T06:38:53Z http://eprints.utm.my/id/eprint/33896/ The role of formation of continues thermally grown oxide layer on the nanostructured NiCrAlY bond coat during thermal exposure in air Daroonparvar, Mohammadreza Hussain, Mohammad Sakhawat Mat Yajid, Muhammad Azizi TJ Mechanical engineering and machinery In recent years, the life expectancy of thermal barrier coatings is expected to be improved by applying the nanostructured NiCrAlY bond coat. The present paper reviews the main technique used in the synthesis of nano-crystalline NiCrAlY powders using a planetary ball mill and investigates the microstructural evolution of thermally grown oxide (TGO) layer on the conventional and nanostructured atmospheric plasma sprayed (APS) NiCrAlY coatings in thermal barrier coating (TBC) systems during oxidation. Microstructural characterization showed that the growth of Ni(Cr,Al) 2O 4 (as spinel) and NiO on the surface of Al 2O 3 layer (as pure TGO) in nano TBC system was much lower compared to that of normal TBC system during thermal exposure at 1150 °C. These two oxides play a detrimental role in causing crack nucleation and growth, reducing the life of the TBC in air. This microstructure optimization of TGO layer is primarily associated with the formation of a continuous, dense, uniform Al 2O 3 layer (at first 24 h of isothermal oxidation at 1000 °C) over the nanostructured NiCrAlY coating. Elsevier 2012-11 Article PeerReviewed Daroonparvar, Mohammadreza and Hussain, Mohammad Sakhawat and Mat Yajid, Muhammad Azizi (2012) The role of formation of continues thermally grown oxide layer on the nanostructured NiCrAlY bond coat during thermal exposure in air. Applied Surface Science, 261 . pp. 287-297. ISSN 0169-4332 http://dx.doi.org/10.1016/j.apsusc.2012.08.002 DOI:10.1016/j.apsusc.2012.08.002
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Daroonparvar, Mohammadreza
Hussain, Mohammad Sakhawat
Mat Yajid, Muhammad Azizi
The role of formation of continues thermally grown oxide layer on the nanostructured NiCrAlY bond coat during thermal exposure in air
description In recent years, the life expectancy of thermal barrier coatings is expected to be improved by applying the nanostructured NiCrAlY bond coat. The present paper reviews the main technique used in the synthesis of nano-crystalline NiCrAlY powders using a planetary ball mill and investigates the microstructural evolution of thermally grown oxide (TGO) layer on the conventional and nanostructured atmospheric plasma sprayed (APS) NiCrAlY coatings in thermal barrier coating (TBC) systems during oxidation. Microstructural characterization showed that the growth of Ni(Cr,Al) 2O 4 (as spinel) and NiO on the surface of Al 2O 3 layer (as pure TGO) in nano TBC system was much lower compared to that of normal TBC system during thermal exposure at 1150 °C. These two oxides play a detrimental role in causing crack nucleation and growth, reducing the life of the TBC in air. This microstructure optimization of TGO layer is primarily associated with the formation of a continuous, dense, uniform Al 2O 3 layer (at first 24 h of isothermal oxidation at 1000 °C) over the nanostructured NiCrAlY coating.
format Article
author Daroonparvar, Mohammadreza
Hussain, Mohammad Sakhawat
Mat Yajid, Muhammad Azizi
author_facet Daroonparvar, Mohammadreza
Hussain, Mohammad Sakhawat
Mat Yajid, Muhammad Azizi
author_sort Daroonparvar, Mohammadreza
title The role of formation of continues thermally grown oxide layer on the nanostructured NiCrAlY bond coat during thermal exposure in air
title_short The role of formation of continues thermally grown oxide layer on the nanostructured NiCrAlY bond coat during thermal exposure in air
title_full The role of formation of continues thermally grown oxide layer on the nanostructured NiCrAlY bond coat during thermal exposure in air
title_fullStr The role of formation of continues thermally grown oxide layer on the nanostructured NiCrAlY bond coat during thermal exposure in air
title_full_unstemmed The role of formation of continues thermally grown oxide layer on the nanostructured NiCrAlY bond coat during thermal exposure in air
title_sort role of formation of continues thermally grown oxide layer on the nanostructured nicraly bond coat during thermal exposure in air
publisher Elsevier
publishDate 2012
url http://eprints.utm.my/id/eprint/33896/
http://dx.doi.org/10.1016/j.apsusc.2012.08.002
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score 13.211869

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