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| Home > Publications database > Alumina Formation and Microstructural Changes of Aluminized CoNiCrAlY Coating During High Temperature Exposure in the Temperature Range 925–1075°C > print |
| Home > Publications database > Alumina Formation and Microstructural Changes of Aluminized CoNiCrAlY Coating During High Temperature Exposure in the Temperature Range 925–1075°C > print |
| 001 | 858383 | ||
| 005 | 20240709094454.0 | ||
| 024 | 7 | _ | |a 10.1080/09603409.2017.1392114 |2 doi |
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| 100 | 1 | _ | |a Jalowicka, A. |0 P:(DE-Juel1)139042 |b 0 |
| 245 | _ | _ | |a Alumina Formation and Microstructural Changes of Aluminized CoNiCrAlY Coating During High Temperature Exposure in the Temperature Range 925–1075°C |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2018 |b Elsevier Science |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a MCrAlY (M = Ni, Co) coatings are commonly used on gas-turbine components as oxidation resistant overlay coatings and bondcoats for thermal barrier systems. In the present work the microstructural features and oxidation behavior of an aluminized Co-base MCrAlY-coating on a Ni-based superalloy have been investigated in the temperature range 925–1075 °C. Microstructural studies of the oxidized coatings by SEM/EBSD were complemented with numerical thermodynamic calculations using the software package ThermoCalc. In the as-received condition the outer part of the coating consisted mostly of β-(Ni,Co)Al. Formation of σ-CoCr was observed at the interface between the β-layer and the inner initial CoNiCrAlY. During high-temperature air exposure alumina based surface scales were formed but the oxidation induced Al depletion of the aluminized coating did not result in formation of the γ’-(Ni3Al) phase. Rather, the subscale formation of Co/Cr-rich phases was observed and a direct transformation of β- into γ-Ni phase after longer times. It is expected that these subscale microstructural changes thus affect the alumina formation and growth as well as the critical aluminum depletion in a different manner as in the case of corresponding β-NiAl coatings, although a direct comparison between various coating systems was not possible on the basis of the present results. |
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| 700 | 1 | _ | |a Naumenko, D. |0 P:(DE-Juel1)129766 |b 1 |e Corresponding author |
| 700 | 1 | _ | |a Ernsberger, M. |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a Herzog, R. |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Quadakkers, W. J. |0 P:(DE-Juel1)129782 |b 4 |
| 773 | _ | _ | |a 10.1080/09603409.2017.1392114 |g Vol. 35, no. 1-3, p. 66 - 77 |0 PERI:(DE-600)2035150-1 |n 1-3 |p 66 - 77 |t Materials at high temperatures |v 35 |y 2018 |x 1878-6413 |
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