Cyclic Oxidation Behavior of Conventional and Niobium-Modified MAR-M246 Superalloy at 900 and 1000 °C
Abstract
:1. Introduction
2. Materials and Methods
3. Results
3.1. Mass Variation Kinetics
3.2. Topographic and Cross-Section SEM/EDS Analysis
3.3. XRD Analysis
3.4. Thermodynamic Simulations
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Elements (wt. %) | MAR-M246(Ta) | MAR-M246(Nb) |
---|---|---|
Cr | 9.0 | 9.09 |
Co | 10.0 | 9.94 |
Mo | 2.5 | 2.46 |
W | 10.0 | 10.1 |
Al | 5.5 | 5.44 |
Ti | 1.5 | 1.44 |
Ta | 1.5 | - |
Nb | - | 0.84 |
C | 0.15 | 0.15 |
B | 0.015 | 0.01 |
Zr | 0.05 | 0.05 |
Ni | Bal. | Bal. |
Alloy | Cycles | Oxidation Products | Oxidation Products |
---|---|---|---|
at 900 °C | at 1000 °C | ||
MAR-M246(Ta) | 180 | TiO2, Al2O3, Cr2O3, | TiO2, Al2O3, Cr2O3, NiO, |
NiO, Ni(Co)Cr2O4 | Ni(Co)Cr2O4, Ni(Co)Al2O4 | ||
MAR-M246(Nb) | 180 | TiO2, Al2O3, Cr2O3, NiO, | TiO2, Al2O3, Cr2O3, NiO, |
Ni(Co)Cr2O4, Ni(Al)Cr2O4 | Ni(Co)Cr2O4, Ni(Co)Al2O4 |
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de Faria Cunha, F.A.; de Andrade Reis, R.; Gonçalves, S.P.; Fernandes, F.A.P.; Baldan, R.; de Sousa Malafaia, A.M. Cyclic Oxidation Behavior of Conventional and Niobium-Modified MAR-M246 Superalloy at 900 and 1000 °C. Coatings 2023, 13, 519. https://doi.org/10.3390/coatings13030519
de Faria Cunha FA, de Andrade Reis R, Gonçalves SP, Fernandes FAP, Baldan R, de Sousa Malafaia AM. Cyclic Oxidation Behavior of Conventional and Niobium-Modified MAR-M246 Superalloy at 900 and 1000 °C. Coatings. 2023; 13(3):519. https://doi.org/10.3390/coatings13030519
Chicago/Turabian Stylede Faria Cunha, Filipe Augusto, Rodrigo de Andrade Reis, Samantha Pinto Gonçalves, Frederico Augusto Pires Fernandes, Renato Baldan, and Artur Mariano de Sousa Malafaia. 2023. "Cyclic Oxidation Behavior of Conventional and Niobium-Modified MAR-M246 Superalloy at 900 and 1000 °C" Coatings 13, no. 3: 519. https://doi.org/10.3390/coatings13030519
APA Stylede Faria Cunha, F. A., de Andrade Reis, R., Gonçalves, S. P., Fernandes, F. A. P., Baldan, R., & de Sousa Malafaia, A. M. (2023). Cyclic Oxidation Behavior of Conventional and Niobium-Modified MAR-M246 Superalloy at 900 and 1000 °C. Coatings, 13(3), 519. https://doi.org/10.3390/coatings13030519