Abstract
Preparation and oxidation of an Y 2O 3-dispersed chromizing coating was investigated by chromizing an as-electrodeposited Ni–Y 2O 3 composite film using a conventional pack-cementation method but at a greatly decreased temperature (800 °C). For comparison, chromizing was also performed in the same condition on an as-deposited Ni film without Y 2O 3 particles. Oxidation at 900 °C indicated that compared to the Y 2O 3-free chromizing coating, the Y 2O 3-dispersed chromizing coating exhibited an increased oxidation resistance, due to the formation of purer and denser chromia scale. The Y 2O 3 effects on the coating formation and the coating oxidation behavior are discussed in detail.
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