Comprehensive damage evaluation of localized spallation of thermal barrier coatings
Abstract Thermal barrier coatings (TBCs) enable the hot section part to work at high temperatures owing to their thermal barrier effect on the base metal components. However, localized spallation in the ceramic top-coat might occur after long duration of thermal exposure or thermal cycling. To compr...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2017-09-01
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| Series: | Journal of Advanced Ceramics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/s40145-017-0234-4 |
| _version_ | 1827840263534411776 |
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| author | Wei-Wei Zhang Guang-Rong Li Qiang Zhang Guan-Jun Yang |
| author_facet | Wei-Wei Zhang Guang-Rong Li Qiang Zhang Guan-Jun Yang |
| author_sort | Wei-Wei Zhang |
| collection | DOAJ |
| description | Abstract Thermal barrier coatings (TBCs) enable the hot section part to work at high temperatures owing to their thermal barrier effect on the base metal components. However, localized spallation in the ceramic top-coat might occur after long duration of thermal exposure or thermal cycling. To comprehensively understand the damage of the top-coat on the overall hot section part, effects of diameter and tilt angle of the spallation on the temperature redistribution of the substrate and the top-coat were investigated. The results show that the spallation diameter and tilt angle both have a significant effect on the temperature redistribution of the top-coat and the substrate. In the case of the substrate, the maximum temperature increment is located at the spallation center. Meanwhile, the surface (depth) maximum temperature increment, having nothing to do with the tilt angle, increases with the increase of the spallation diameter. In contrast, in the case of the top-coat, the maximum temperature increment was located at the sharp corner of the spallation area, and the surface (depth) maximum temperature increment increases with the increase of both the spallation diameter and the tilt angle. Based on the temperature redistribution of the substrate and the top-coat affected by the partial spallation, it is possible to evaluate the damage effect of spalled areas on the thermal capability of TBCs. |
| first_indexed | 2024-03-12T07:31:12Z |
| format | Article |
| id | doaj.art-666d595fd73340458a41a0ef0e57d0c5 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-12T07:31:12Z |
| publishDate | 2017-09-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-666d595fd73340458a41a0ef0e57d0c52023-09-02T21:46:06ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082017-09-016323023910.1007/s40145-017-0234-4Comprehensive damage evaluation of localized spallation of thermal barrier coatingsWei-Wei Zhang0Guang-Rong Li1Qiang Zhang2Guan-Jun Yang3State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong UniversityState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong UniversityState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong UniversityState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong UniversityAbstract Thermal barrier coatings (TBCs) enable the hot section part to work at high temperatures owing to their thermal barrier effect on the base metal components. However, localized spallation in the ceramic top-coat might occur after long duration of thermal exposure or thermal cycling. To comprehensively understand the damage of the top-coat on the overall hot section part, effects of diameter and tilt angle of the spallation on the temperature redistribution of the substrate and the top-coat were investigated. The results show that the spallation diameter and tilt angle both have a significant effect on the temperature redistribution of the top-coat and the substrate. In the case of the substrate, the maximum temperature increment is located at the spallation center. Meanwhile, the surface (depth) maximum temperature increment, having nothing to do with the tilt angle, increases with the increase of the spallation diameter. In contrast, in the case of the top-coat, the maximum temperature increment was located at the sharp corner of the spallation area, and the surface (depth) maximum temperature increment increases with the increase of both the spallation diameter and the tilt angle. Based on the temperature redistribution of the substrate and the top-coat affected by the partial spallation, it is possible to evaluate the damage effect of spalled areas on the thermal capability of TBCs.http://link.springer.com/article/10.1007/s40145-017-0234-4thermal barrier coatings (TBCs)thermal propertylocalized spallationdamage evaluation |
| spellingShingle | Wei-Wei Zhang Guang-Rong Li Qiang Zhang Guan-Jun Yang Comprehensive damage evaluation of localized spallation of thermal barrier coatings Journal of Advanced Ceramics thermal barrier coatings (TBCs) thermal property localized spallation damage evaluation |
| title | Comprehensive damage evaluation of localized spallation of thermal barrier coatings |
| title_full | Comprehensive damage evaluation of localized spallation of thermal barrier coatings |
| title_fullStr | Comprehensive damage evaluation of localized spallation of thermal barrier coatings |
| title_full_unstemmed | Comprehensive damage evaluation of localized spallation of thermal barrier coatings |
| title_short | Comprehensive damage evaluation of localized spallation of thermal barrier coatings |
| title_sort | comprehensive damage evaluation of localized spallation of thermal barrier coatings |
| topic | thermal barrier coatings (TBCs) thermal property localized spallation damage evaluation |
| url | http://link.springer.com/article/10.1007/s40145-017-0234-4 |
| work_keys_str_mv | AT weiweizhang comprehensivedamageevaluationoflocalizedspallationofthermalbarriercoatings AT guangrongli comprehensivedamageevaluationoflocalizedspallationofthermalbarriercoatings AT qiangzhang comprehensivedamageevaluationoflocalizedspallationofthermalbarriercoatings AT guanjunyang comprehensivedamageevaluationoflocalizedspallationofthermalbarriercoatings |