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Improved oxidation resistance of a CeO<sub>2</sub>-midifed aluminide coating by low-temperature pack cementation
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School of Materials Engineering,Shanghai University of Science and Engineering

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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    Abstract:

    CeO2-free and CeO2-modified aluminide coatings were prepared by aluminizing pure Ni film and Ni-CeO2 film on Ni plate at 620°C, respectively. The effect of the CeO2 addition on the growth rate and adhesion of the alumina scale was investigated at 1000 °C. The results show that the addition of nanometer CeO2 in aluminide coating of δ phase delayed the formation of a continuous α-Al2O3 scale and decreased the growth rate of alumina scale during oxidation. Moreover, the alumina scale adhesion was improved by the addition of nanometer CeO2 due to the smaller cavities formed at the alumina scale/coating interface compared with the CeO2-free one.

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[Xiaoxiao Tan. Improved oxidation resistance of a CeO<sub>2</sub>-midifed aluminide coating by low-temperature pack cementation[J]. Rare Metal Materials and Engineering,2019,48(6):1785~1790.]
DOI:10.12442/j. issn.1002-185X.20180938

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History
  • Received:September 09,2018
  • Revised:September 30,2018
  • Adopted:October 19,2018
  • Online: July 30,2019
  • Published: