Role of Aluminide Coating on Oxidation Resistance of Ni-Based Single Crystal Superalloy at 900 °C
Abstrak
In the present study, the role of aluminide coating on oxidation resistance of Ni-based single crystal superalloy was studied at 900 °C. The oxidation kinetics curves obey the parabolic law in both conditions. However, the significant difference was found after 100 h oxidation in both conditions. The coated specimens showed a better oxidation resistance than the uncoated ones. This is due to the phase transformation occurred from θ-Al2O3 to α-Al2O3 in the coated specimens with increasing oxidation time but not in the uncoated ones. The production of more α-Al2O3 during oxidation is expected since α-Al2O3 acts as a protective layer against oxidation due to its stability at high temperatures. It could be also recognized from the surface morphology of the oxidized coated specimen after 500 h oxidation.
Topik & Kata Kunci
Penulis (3)
Fahamsyah H. Latief
El-Sayed M. Sherif
Koji Kakehi
Akses Cepat
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- 2015
- Sumber Database
- DOAJ
- DOI
- 10.1016/S1452-3981(23)05118-0
- Akses
- Open Access ✓