Microstructure Evolution and Damage Mechanism of DD9 Single Crystal Superalloy-Thermal Barrier Coating System Under High Temperature Oxidation: A Comparative Study with DD6
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| Publicado en: | Materials vol. 18, no. 18 (2025), p. 4332-4352 |
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MDPI AG
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| Acceso en línea: | Citation/Abstract Full Text + Graphics Full Text - PDF |
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| 001 | 3254597838 | ||
| 003 | UK-CbPIL | ||
| 022 | |a 1996-1944 | ||
| 024 | 7 | |a 10.3390/ma18184332 |2 doi | |
| 035 | |a 3254597838 | ||
| 045 | 2 | |b d20250101 |b d20251231 | |
| 084 | |a 231532 |2 nlm | ||
| 100 | 1 | |a Pan, Li |u School of Civil Aviation, Northwestern Polytechnical University, Xi’an 710072, China; lp0816@nwpu.edu.cn | |
| 245 | 1 | |a Microstructure Evolution and Damage Mechanism of DD9 Single Crystal Superalloy-Thermal Barrier Coating System Under High Temperature Oxidation: A Comparative Study with DD6 | |
| 260 | |b MDPI AG |c 2025 | ||
| 513 | |a Journal Article | ||
| 520 | 3 | |a This study investigates the microstructural evolution and damage mechanisms of the nickel-based single-crystal superalloy DD9-thermal barrier coating (TBC) system under 1050 °C high-temperature oxidation, while conducting a comparative analysis of oxidation behavior with the DD6-TBC system. Results show that both systems have similar oxidation mechanisms but face long-term oxidation drawbacks: as oxidation time increases, the thermally grown oxide (TGO) evolves into a mixed oxide layer and an Al2O3 layer, with initial rapid TGO growth consuming Al in the bond coat (BC) and subsequent Al depletion slowing growth, though long-term TGO accumulation raises cracking and spallation risks. DD9 and DD6 substrates significantly affect substrate-BC interfacial interdiffusion: the interdiffusion zone (IDZ) and secondary reaction zone (SRZ) grow continuously (SRZ growing faster), and linear topologically close-packed (TCP) phases precipitate in the SRZ, spreading throughout the substrate and impairing high-temperature mechanical properties. Specifically, DD9’s IDZ growth rate is faster than DD6’s in the first 800 h of oxidation but slows below DD6’s afterward, reflecting DD9’s superior long-term oxidation resistance due to better temperature resistance and high-temperature stability. This study clarifies key high-temperature service disadvantages of the two systems, providing experimental support for coated turbine blade life evaluation and a theoretical basis for optimizing third-generation single-crystal superalloy-TBC systems to enhance high-temperature service stability. | |
| 653 | |a Mechanical properties | ||
| 653 | |a Investigations | ||
| 653 | |a Oxidation resistance | ||
| 653 | |a Single crystals | ||
| 653 | |a Mixed oxides | ||
| 653 | |a High temperature | ||
| 653 | |a Airplane engines | ||
| 653 | |a Protective coatings | ||
| 653 | |a Cracking (fracturing) | ||
| 653 | |a Thermal barrier coatings | ||
| 653 | |a Damage | ||
| 653 | |a Research & development--R&D | ||
| 653 | |a Superalloys | ||
| 653 | |a Corrosion | ||
| 653 | |a Aircraft | ||
| 653 | |a Turbines | ||
| 653 | |a Comparative studies | ||
| 653 | |a Oxidation | ||
| 653 | |a Substrates | ||
| 653 | |a Interdiffusion | ||
| 653 | |a Thermal barriers | ||
| 653 | |a Aluminum oxide | ||
| 653 | |a Turbine blades | ||
| 653 | |a Spallation | ||
| 653 | |a Stability | ||
| 653 | |a Nickel | ||
| 653 | |a Alloys | ||
| 653 | |a Microstructure | ||
| 700 | 1 | |a Xin Zhenyu |u Xi’an Key Laboratory of Extreme Environment and Protection Technology, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, Chinajinxiaochao@xjtu.edu.cn (X.J.) | |
| 700 | 1 | |a Sun, Fan |u National Key Laboratory of Energetic Materials, Xi’an Modern Chemistry Research Institute, Xi’an 710065, China; sf2038945624@163.com | |
| 700 | 1 | |a Jin Xiaochao |u Xi’an Key Laboratory of Extreme Environment and Protection Technology, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, Chinajinxiaochao@xjtu.edu.cn (X.J.) | |
| 700 | 1 | |a Zhang, Chao |u School of Civil Aviation, Northwestern Polytechnical University, Xi’an 710072, China; lp0816@nwpu.edu.cn | |
| 773 | 0 | |t Materials |g vol. 18, no. 18 (2025), p. 4332-4352 | |
| 786 | 0 | |d ProQuest |t Materials Science Database | |
| 856 | 4 | 1 | |3 Citation/Abstract |u https://www.proquest.com/docview/3254597838/abstract/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text + Graphics |u https://www.proquest.com/docview/3254597838/fulltextwithgraphics/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text - PDF |u https://www.proquest.com/docview/3254597838/fulltextPDF/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |