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Preparation and oxidation behavior of a novel CeO2-modified chromizing coating
- Source :
- Transactions of Nonferrous Metals Society of China; May 2013, Vol. 23 Issue: 5 p1375-1381, 7p
- Publication Year :
- 2013
-
Abstract
- By using CeO2particles instead of part of Al2O3particles as filler, the CeO2was successfully entrapped into the outer layer of the chromizing coatings on the as-deposited nanocrystalline (NC) and microcrystalline (MC) Ni films using a conventional pack-cementation method at 800 °C. For comparison, chromizing was also performed under the same condition on MC Ni film using Al2O3as filler without CeO2particles. SEM/EDX and TEM results indicate that the refinement of Ni grain and CeO2entrapped into the chromizing coatings refine the grain of the chromizing coating. Oxidation at 900 °C indicates that compared with the CeO2-free chromizing coating, the CeO2-dispersed chromizing coating exhibits an increased oxidation resistance. For the CeO2-dispersed chromizing coating, the refinement of Ni grain size significantly decreases the transient-oxidation scaling rate of the chromizing coatings. Together with this, the CeO2-dispersed chromizing coating formed on NC Ni exhibits a better oxidation resistance.
Details
- Language :
- English
- ISSN :
- 10036326
- Volume :
- 23
- Issue :
- 5
- Database :
- Supplemental Index
- Journal :
- Transactions of Nonferrous Metals Society of China
- Publication Type :
- Periodical
- Accession number :
- ejs33590556
- Full Text :
- https://doi.org/10.1016/S1003-6326(13)62606-0