High temperature hardness and thermal analysis of CoNiCrAlY alloys used as bond coats for thermal barrier coatings
CoNiCrAlY alloys, commonly used as the bond coat of thermal barrier coatings (TBCs), are often exposed to high temperatures of about 1000 °C, the evolution of mechanical and thermal properties is critical to the reliability and durability of TBCs. In this paper, the hardness and thermal properties (...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424007002 |
| _version_ | 1827216709435523072 |
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| author | Xiaozhen Li Weixu Zhang Xiaobing Cai Hetong Liu Xiaotao Luo |
| author_facet | Xiaozhen Li Weixu Zhang Xiaobing Cai Hetong Liu Xiaotao Luo |
| author_sort | Xiaozhen Li |
| collection | DOAJ |
| description | CoNiCrAlY alloys, commonly used as the bond coat of thermal barrier coatings (TBCs), are often exposed to high temperatures of about 1000 °C, the evolution of mechanical and thermal properties is critical to the reliability and durability of TBCs. In this paper, the hardness and thermal properties (weight change and heat flow) of CoNiCrAlY alloys at temperatures within 1000 °C were evaluated by indentation and TGA-DSC thermal analysis. It was found that hardness and thermal properties change gradually within 600 °C but change sharply above 600 °C, exhibiting an approximately synchronized evolution. An illustrative explanation was given for the correlation in terms of the Boltzmann energy distribution theory of microscopic particles. Based on these findings, an idea of inter-calibration between the two evolutions was proposed. |
| first_indexed | 2024-04-24T18:47:59Z |
| format | Article |
| id | doaj.art-f73ce8a47725472b9baecc172fc3aa6a |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2025-03-21T15:07:26Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-f73ce8a47725472b9baecc172fc3aa6a2024-06-20T06:52:55ZengElsevierJournal of Materials Research and Technology2238-78542024-05-013010201023High temperature hardness and thermal analysis of CoNiCrAlY alloys used as bond coats for thermal barrier coatingsXiaozhen Li0Weixu Zhang1Xiaobing Cai2Hetong Liu3Xiaotao Luo4State Key Laboratory for Strength and Vibration of Mechanical Structures, Department of Engineering Mechanics, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an, 710049, ChinaState Key Laboratory for Strength and Vibration of Mechanical Structures, Department of Engineering Mechanics, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; Corresponding author.State Key Laboratory for Strength and Vibration of Mechanical Structures, Department of Engineering Mechanics, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an, 710049, ChinaChina Nuclear Power Engineering Co., Ltd, Beijing, 100840, ChinaState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science Engineering, Xi'an Jiaotong University, Xi'an, 710049, ChinaCoNiCrAlY alloys, commonly used as the bond coat of thermal barrier coatings (TBCs), are often exposed to high temperatures of about 1000 °C, the evolution of mechanical and thermal properties is critical to the reliability and durability of TBCs. In this paper, the hardness and thermal properties (weight change and heat flow) of CoNiCrAlY alloys at temperatures within 1000 °C were evaluated by indentation and TGA-DSC thermal analysis. It was found that hardness and thermal properties change gradually within 600 °C but change sharply above 600 °C, exhibiting an approximately synchronized evolution. An illustrative explanation was given for the correlation in terms of the Boltzmann energy distribution theory of microscopic particles. Based on these findings, an idea of inter-calibration between the two evolutions was proposed.http://www.sciencedirect.com/science/article/pii/S2238785424007002CoNiCrAlY alloyHigh temperature hardnessThermal analysis |
| spellingShingle | Xiaozhen Li Weixu Zhang Xiaobing Cai Hetong Liu Xiaotao Luo High temperature hardness and thermal analysis of CoNiCrAlY alloys used as bond coats for thermal barrier coatings Journal of Materials Research and Technology CoNiCrAlY alloy High temperature hardness Thermal analysis |
| title | High temperature hardness and thermal analysis of CoNiCrAlY alloys used as bond coats for thermal barrier coatings |
| title_full | High temperature hardness and thermal analysis of CoNiCrAlY alloys used as bond coats for thermal barrier coatings |
| title_fullStr | High temperature hardness and thermal analysis of CoNiCrAlY alloys used as bond coats for thermal barrier coatings |
| title_full_unstemmed | High temperature hardness and thermal analysis of CoNiCrAlY alloys used as bond coats for thermal barrier coatings |
| title_short | High temperature hardness and thermal analysis of CoNiCrAlY alloys used as bond coats for thermal barrier coatings |
| title_sort | high temperature hardness and thermal analysis of conicraly alloys used as bond coats for thermal barrier coatings |
| topic | CoNiCrAlY alloy High temperature hardness Thermal analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424007002 |
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