Abstract
Rare-earth elements in Ni-based single-crystal superalloys are easily lost during the casting process. The effects of incorporating Ca on the loss of Y from an Ni-based superalloy and the cyclic oxidation of this alloy have been investigated. The addition of Ca increases the Y content from 10.87 to 72.78 ppm, which has been rationalized by thermodynamic calculation of the Gibbs free energy. Ca also reduces the falling off of the protective oxide film of Y-containing Ni-based alloy and enhances the cyclic oxidation performance.
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Acknowledgements
This work is financially supported by National Natural Science Foundation of China (Grant Nos. 51761014, 51401095) and Jiangxi Provincial Department of Science and Technology (Grant Nos. 20171BAB216004, 20161BBH80030). Thanks are given to Mr. Jun Zhang for his help during the course of casting experiments.
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Shang, G., Gao, P., Luo, F. et al. Effect of Ca on the Y Content and Cyclic Oxidation Behavior of Ni-Based Single-Crystal Superalloy. Inter Metalcast 12, 607–613 (2018). https://doi.org/10.1007/s40962-017-0198-8
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DOI: https://doi.org/10.1007/s40962-017-0198-8