Effect of Pt-rich position on the hot corrosion behavior of NiCoCrAlY coating for a single-crystal superalloy
| Autor: | Yingfei Yang, Zixian Bao, Fuhui Wang, Shizheng Zhu, Pan Ren, Wei Li |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
020209 energy Oxide 02 engineering and technology Surfaces and Interfaces General Chemistry Adhesion Substrate (electronics) engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Surfaces Coatings and Films Corrosion chemistry.chemical_compound chemistry Coating 0202 electrical engineering electronic engineering information engineering Materials Chemistry engineering Composite material 0210 nano-technology Corrosion behavior Single crystal superalloy |
| Zdroj: | Surface and Coatings Technology. 395:125938 |
| ISSN: | 0257-8972 |
| Popis: | Two Pt modified NiCoCrAlY coatings were prepared with the Pt-rich zone located at the coating surface (NiCoCrAlY + Pt) or at the substrate/coating interface (Pt + NiCoCrAlY). The microstructures of two coatings were studied with TEM. The hot corrosion performance of the coatings was investigated in Na2SO4/NaCl (75:25, wt./wt.) mixed salt at 900 °C in comparison with the plain NiCoCrAlY coating. The results revealed that the NiCoCrAl + Pt coating showed superior hot corrosion resistance due to higher Al content at the surface and merits of Pt in improving oxide scale adhesion. Ta was constrained beneath the coating/substrate interface in Pt + NiCoCrAlY coating owing to the strong affinity between Pt and Ta. |
| Databáze: | OpenAIRE |
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