Title of article
Microstructure and Oxidation Behavior of Modified Aluminide Coating on Ni3Al-based Single Crystal Superalloy
Author/Authors
YANG، نويسنده , , Ruibo and WU، نويسنده , , Yuxiao and WU، نويسنده , , Qiong and LI، نويسنده , , Shusuo and MA، نويسنده , , Yue and Gong، نويسنده , , Shengkai، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2012
Pages
6
From page
825
To page
830
Abstract
Al, Al-Si and Cr-Al-Si coatings are prepared onto IC20 alloy by powder pack cementation to improve the oxidation resistance of the alloy. The isothermal oxidation behaviors of the coatings and the uncoated IC20 alloy at 1 100 °C are comparatively investigated. For the coatings, less weight gains are obtained compared to the uncoated alloy after 100 h thermal exposure. The Al-Si coating exhibits the best oxidation resistance, while the addition of Cr accelerates the scale spallation. Phase transformation from β-NiAl to γ and γ′ occurs in the coating after oxidation for extended periods. The oxidation protection and degradation mechanisms for these coatings are discussed.
Keywords
Superalloys , Coatings , powder pack cementation , Oxidation resistance , microstructure
Journal title
Chinese Journal of Aeronautics
Serial Year
2012
Journal title
Chinese Journal of Aeronautics
Record number
2265183
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