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High temperature oxidation behavior of Y-Cr-Al coatings on Ni-based superalloy by pack cementation
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1.Mechanical and Electrical Department,Nantong Shipping College,Nantong;2.School of Materials Science and Engineering,Jiangsu University,Zhenjiang

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    Abstract:

    The oxidation behaviors of Y-Cr-Al coatings by pack cementation process with different Al content were investigated. The results show that the coating with 2% Al content in the pack has a three-layer structure, while the coatings with 2.5% and 3% Al content have two layers. And the main phases in the coating with 2% and 3% Al content are α-Cr and NiAl, respectively. But the main phases in coating with 2.5% Al content is NiAl with several Cr-rich particles and solid solution Cr atoms in the coating. The oxidation test demonstrates that the coated specimen with 2% Al content has the poorest oxidation resistance, but the one with 2.5% Al content has a favorable oxidation resistance.

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[Cao Jiangdong, Tong Fuli, Yinqin Hua. High temperature oxidation behavior of Y-Cr-Al coatings on Ni-based superalloy by pack cementation[J]. Rare Metal Materials and Engineering,2019,48(11):3448~3454.]
DOI:10.12442/j. issn.1002-185X.20180986

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History
  • Received:September 25,2018
  • Revised:December 24,2018
  • Adopted:December 29,2018
  • Online: December 10,2019
  • Published: