Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7895194 | Corrosion Science | 2015 | 13 Pages |
Abstract
Corrosion and carburization behavior of chromia-forming heat resistant alloys in high-temperature supercritical-CO2 were investigated. For all alloys, a thin and continuous chromia (Cr2O3) layer was formed on the surface, while the existence of an amorphous carbon layer was identified at the chromia/matrix interface. Below the amorphous C layer, Cr-rich M23C6 carbides were extensively formed in Alloy 800HT but not in Alloy 600 or Alloy 690. The carburization resistance was dependent on whether the matrix is Fe-based or Ni-based. The existence of the carburized region with Cr-rich M23C6 carbides in Alloy 800HT contributed to additional loss of ductility.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Ho Jung Lee, Hyunmyung Kim, Sung Hwan Kim, Changheui Jang,