Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD
Summary: La2Zr2O7 coatings are promising candidates to substitute YSZ coatings in advanced gas turbine engines. In this work, Sm-doped La2Zr2O7 coatings were deposited by physical vapor deposition. This work focuses on the crystal structure, thermal conductivity, thermal expansion coefficient, morph...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-04-01
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| Series: | iScience |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004222003765 |
| _version_ | 1819050079055511552 |
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| author | Zaoyu Shen Guanxi Liu Rujing Zhang Jianwei Dai Limin He Rende Mu |
| author_facet | Zaoyu Shen Guanxi Liu Rujing Zhang Jianwei Dai Limin He Rende Mu |
| author_sort | Zaoyu Shen |
| collection | DOAJ |
| description | Summary: La2Zr2O7 coatings are promising candidates to substitute YSZ coatings in advanced gas turbine engines. In this work, Sm-doped La2Zr2O7 coatings were deposited by physical vapor deposition. This work focuses on the crystal structure, thermal conductivity, thermal expansion coefficient, morphology, composition, and thermal durability of LaSmZrO coatings. The LaSmZrO ceramics exhibit low thermal conductivity (1.69 W/mK at 800°C) and high thermal expansion coefficient (9.72∗10−6 K−1 at 1500°C) compared with La2Zr2O7. The LaSmZrO/YSZ coatings with feathery microstructure show relatively good thermal durability (8183 cycles or 856 h) under high temperature. The broken regions are observed at the ceramic coating/bond coating interface. The failure behaviors are relevant with crack evolution and thermally grown oxide growth. This work might guide the investigation of advanced coatings under high temperature. |
| first_indexed | 2024-12-21T11:42:20Z |
| format | Article |
| id | doaj.art-87eda7f793474462bfc332fff298d574 |
| institution | Directory Open Access Journal |
| issn | 2589-0042 |
| language | English |
| last_indexed | 2024-12-21T11:42:20Z |
| publishDate | 2022-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj.art-87eda7f793474462bfc332fff298d5742022-12-21T19:05:16ZengElsevieriScience2589-00422022-04-01254104106Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVDZaoyu Shen0Guanxi Liu1Rujing Zhang2Jianwei Dai3Limin He4Rende Mu5Key Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing 100095, PR China; Corresponding authorKey Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing 100095, PR ChinaKey Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing 100095, PR ChinaKey Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing 100095, PR ChinaKey Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing 100095, PR ChinaKey Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing 100095, PR China; Corresponding authorSummary: La2Zr2O7 coatings are promising candidates to substitute YSZ coatings in advanced gas turbine engines. In this work, Sm-doped La2Zr2O7 coatings were deposited by physical vapor deposition. This work focuses on the crystal structure, thermal conductivity, thermal expansion coefficient, morphology, composition, and thermal durability of LaSmZrO coatings. The LaSmZrO ceramics exhibit low thermal conductivity (1.69 W/mK at 800°C) and high thermal expansion coefficient (9.72∗10−6 K−1 at 1500°C) compared with La2Zr2O7. The LaSmZrO/YSZ coatings with feathery microstructure show relatively good thermal durability (8183 cycles or 856 h) under high temperature. The broken regions are observed at the ceramic coating/bond coating interface. The failure behaviors are relevant with crack evolution and thermally grown oxide growth. This work might guide the investigation of advanced coatings under high temperature.http://www.sciencedirect.com/science/article/pii/S2589004222003765Materials scienceMaterials synthesisThermal propertyCoatings |
| spellingShingle | Zaoyu Shen Guanxi Liu Rujing Zhang Jianwei Dai Limin He Rende Mu Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD iScience Materials science Materials synthesis Thermal property Coatings |
| title | Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD |
| title_full | Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD |
| title_fullStr | Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD |
| title_full_unstemmed | Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD |
| title_short | Thermal property and failure behavior of LaSmZrO thermal barrier coatings by EB-PVD |
| title_sort | thermal property and failure behavior of lasmzro thermal barrier coatings by eb pvd |
| topic | Materials science Materials synthesis Thermal property Coatings |
| url | http://www.sciencedirect.com/science/article/pii/S2589004222003765 |
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