Damage evolution of TBC by rapid thermal cycling test based on a laser irradiation
Thermal barrier coating (TBC) is deposited onto the surface of gas turbine blade in order to prevent from a high-temperature combustion gas flow. Crack and delamination of ceramic top coating (TC), which come from a high heat flux loading, are serious problem in TBC. In this study, the rapid thermal...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2020-02-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/86/883/86_19-00426/_pdf/-char/en |
| _version_ | 1828286228857880576 |
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| author | Yusuke HAYASHI Kento SUZUKI Masayuki ARAI Kiyohiro ITO Tsuyoshi HIGUCHI Tatsuo SUIDZU |
| author_facet | Yusuke HAYASHI Kento SUZUKI Masayuki ARAI Kiyohiro ITO Tsuyoshi HIGUCHI Tatsuo SUIDZU |
| author_sort | Yusuke HAYASHI |
| collection | DOAJ |
| description | Thermal barrier coating (TBC) is deposited onto the surface of gas turbine blade in order to prevent from a high-temperature combustion gas flow. Crack and delamination of ceramic top coating (TC), which come from a high heat flux loading, are serious problem in TBC. In this study, the rapid thermal cycling device based on a laser irradiation was developed. It was then investigated how those damages progress in TC subjected to rapid thermal cyclic loading based on the cross-sectional observation and the monitoring of acoustic emission (AE). As a result, a sintered layer was formed beneath the surface of the TC. It was also found that both vertical and horizontal cracks were initiated and propagated in TC. The monitoring of AE revealed that these cracks are initiated in cooling periods and vertical cracks are also formed in TC at early stage of thermal cycles. In addition, AE counts were strongly related to maximum temperature condition. Finally, mechanical factors of those damages were discussed based upon theoretical evaluation using the TBC model including the sintering phenomenon. It was identified that the damage was initiated with temperature gradient in the TC for early stage of thermal cycles and was progressed with a tensile stress accumulated due to sintered layer formation for later stage. |
| first_indexed | 2024-04-13T09:28:46Z |
| format | Article |
| id | doaj.art-39263c5623034796bc10cfa5d1d502b5 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-13T09:28:46Z |
| publishDate | 2020-02-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-39263c5623034796bc10cfa5d1d502b52022-12-22T02:52:21ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612020-02-018688319-0042619-0042610.1299/transjsme.19-00426transjsmeDamage evolution of TBC by rapid thermal cycling test based on a laser irradiationYusuke HAYASHI0Kento SUZUKI1Masayuki ARAI2Kiyohiro ITO3Tsuyoshi HIGUCHI4Tatsuo SUIDZU5Graduate School of Mechanical Engineering, Tokyo University of ScienceGraduate School of Mechanical Engineering, Tokyo University of ScienceDepartment of Mechanical Engineering, Tokyo University of ScienceDepartment of Mechanical Engineering, Tokyo University of ScienceMaterials Engineering Department, Nissan Motor Co.Thermal Spraying Technology R&D Laboratories, TOCALO Co.Thermal barrier coating (TBC) is deposited onto the surface of gas turbine blade in order to prevent from a high-temperature combustion gas flow. Crack and delamination of ceramic top coating (TC), which come from a high heat flux loading, are serious problem in TBC. In this study, the rapid thermal cycling device based on a laser irradiation was developed. It was then investigated how those damages progress in TC subjected to rapid thermal cyclic loading based on the cross-sectional observation and the monitoring of acoustic emission (AE). As a result, a sintered layer was formed beneath the surface of the TC. It was also found that both vertical and horizontal cracks were initiated and propagated in TC. The monitoring of AE revealed that these cracks are initiated in cooling periods and vertical cracks are also formed in TC at early stage of thermal cycles. In addition, AE counts were strongly related to maximum temperature condition. Finally, mechanical factors of those damages were discussed based upon theoretical evaluation using the TBC model including the sintering phenomenon. It was identified that the damage was initiated with temperature gradient in the TC for early stage of thermal cycles and was progressed with a tensile stress accumulated due to sintered layer formation for later stage.https://www.jstage.jst.go.jp/article/transjsme/86/883/86_19-00426/_pdf/-char/engas turbinethermal barrier coatingslaser irradiationacoustic emissioncracking |
| spellingShingle | Yusuke HAYASHI Kento SUZUKI Masayuki ARAI Kiyohiro ITO Tsuyoshi HIGUCHI Tatsuo SUIDZU Damage evolution of TBC by rapid thermal cycling test based on a laser irradiation Nihon Kikai Gakkai ronbunshu gas turbine thermal barrier coatings laser irradiation acoustic emission cracking |
| title | Damage evolution of TBC by rapid thermal cycling test based on a laser irradiation |
| title_full | Damage evolution of TBC by rapid thermal cycling test based on a laser irradiation |
| title_fullStr | Damage evolution of TBC by rapid thermal cycling test based on a laser irradiation |
| title_full_unstemmed | Damage evolution of TBC by rapid thermal cycling test based on a laser irradiation |
| title_short | Damage evolution of TBC by rapid thermal cycling test based on a laser irradiation |
| title_sort | damage evolution of tbc by rapid thermal cycling test based on a laser irradiation |
| topic | gas turbine thermal barrier coatings laser irradiation acoustic emission cracking |
| url | https://www.jstage.jst.go.jp/article/transjsme/86/883/86_19-00426/_pdf/-char/en |
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