Evaluation of Normal and Nanolayer Composite Thermal Barrier Coatings in Fused Vanadate-Sulfate Salts at 1000°C
Hot corrosion behavior of yttria stabilized zirconia (YSZ), YSZ/normal Al2O3, and YSZ/nano-Al2O3 coatings was investigated in the presence of molten mixture of Na2SO4 + V2O5 at 1000°C. Microstructural characterization showed that the creation of hot corrosion products containing YVO4 crystals and mo...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2013/790318 |
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| author | Mohammadreza Daroonparvar Muhamad Azizi Mat Yajid Noordin Mohd. Yusof Hamid Reza Bakhsheshi-Rad Mohammad Sakhawat Hussain Esah Hamzah |
| author_facet | Mohammadreza Daroonparvar Muhamad Azizi Mat Yajid Noordin Mohd. Yusof Hamid Reza Bakhsheshi-Rad Mohammad Sakhawat Hussain Esah Hamzah |
| author_sort | Mohammadreza Daroonparvar |
| collection | DOAJ |
| description | Hot corrosion behavior of yttria stabilized zirconia (YSZ), YSZ/normal Al2O3, and YSZ/nano-Al2O3 coatings was investigated in the presence of molten mixture of Na2SO4 + V2O5 at 1000°C. Microstructural characterization showed that the creation of hot corrosion products containing YVO4 crystals and monoclinic ZrO2 is primarily related to the reaction between NaVO3 and Y2O3 during hot corrosion. The lowest amount of hot corrosion products was observed in YSZ as an inner layer of YSZ/nano-Al2O3 coating. Hence, it can be concluded that the presence of nanostructured Al2O3 layer over the conventional YSZ coating can considerably reduce the infiltration of molten corrosive salts into the YSZ layer during hot corrosion which is mainly related to the compactness of nanostructured alumina layer (including nanoregions) in comparison with normal alumina layer. |
| format | Article |
| id | doaj-art-3a7f56ed951c4588be32d3e24769a101 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-3a7f56ed951c4588be32d3e24769a1012025-02-03T05:50:20ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422013-01-01201310.1155/2013/790318790318Evaluation of Normal and Nanolayer Composite Thermal Barrier Coatings in Fused Vanadate-Sulfate Salts at 1000°CMohammadreza Daroonparvar0Muhamad Azizi Mat Yajid1Noordin Mohd. Yusof2Hamid Reza Bakhsheshi-Rad3Mohammad Sakhawat Hussain4Esah Hamzah5Department of Materials, Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, MalaysiaDepartment of Materials, Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, MalaysiaDepartment of Materials, Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, MalaysiaDepartment of Materials, Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, MalaysiaDepartment of Materials, Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, MalaysiaDepartment of Materials, Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, MalaysiaHot corrosion behavior of yttria stabilized zirconia (YSZ), YSZ/normal Al2O3, and YSZ/nano-Al2O3 coatings was investigated in the presence of molten mixture of Na2SO4 + V2O5 at 1000°C. Microstructural characterization showed that the creation of hot corrosion products containing YVO4 crystals and monoclinic ZrO2 is primarily related to the reaction between NaVO3 and Y2O3 during hot corrosion. The lowest amount of hot corrosion products was observed in YSZ as an inner layer of YSZ/nano-Al2O3 coating. Hence, it can be concluded that the presence of nanostructured Al2O3 layer over the conventional YSZ coating can considerably reduce the infiltration of molten corrosive salts into the YSZ layer during hot corrosion which is mainly related to the compactness of nanostructured alumina layer (including nanoregions) in comparison with normal alumina layer.http://dx.doi.org/10.1155/2013/790318 |
| spellingShingle | Mohammadreza Daroonparvar Muhamad Azizi Mat Yajid Noordin Mohd. Yusof Hamid Reza Bakhsheshi-Rad Mohammad Sakhawat Hussain Esah Hamzah Evaluation of Normal and Nanolayer Composite Thermal Barrier Coatings in Fused Vanadate-Sulfate Salts at 1000°C Advances in Materials Science and Engineering |
| title | Evaluation of Normal and Nanolayer Composite Thermal Barrier Coatings in Fused Vanadate-Sulfate Salts at 1000°C |
| title_full | Evaluation of Normal and Nanolayer Composite Thermal Barrier Coatings in Fused Vanadate-Sulfate Salts at 1000°C |
| title_fullStr | Evaluation of Normal and Nanolayer Composite Thermal Barrier Coatings in Fused Vanadate-Sulfate Salts at 1000°C |
| title_full_unstemmed | Evaluation of Normal and Nanolayer Composite Thermal Barrier Coatings in Fused Vanadate-Sulfate Salts at 1000°C |
| title_short | Evaluation of Normal and Nanolayer Composite Thermal Barrier Coatings in Fused Vanadate-Sulfate Salts at 1000°C |
| title_sort | evaluation of normal and nanolayer composite thermal barrier coatings in fused vanadate sulfate salts at 1000°c |
| url | http://dx.doi.org/10.1155/2013/790318 |
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