High Temperature Oxidation Behavior of Nano-Alumina-Modified NiAl Coating

摘要

In this article, the nickel aluminide coating prepared by the chemical vapor deposition method has adhered deliberately with nano-alumina film on the surface by the electrophoresis method. The analysis results of oxidation behavior in the air at 1,000 degrees C reported that the nano-alumina particles adhering to the nickel aluminide coating surface appear to be effective in facilitating the theta-Al2O3 to alpha-Al2O3 phase transformation. The fast theta to alpha phase transformation helps reduce the oxidation rate of the nickel-aluminum coating and prevents the cracking and peeling in the oxide scale. The research addressed a novel method to improve the high-temperature oxidation resistance of nickel aluminide coatings.

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