Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effects of Palladium Buffer Layer on the Oxidation Resistance of Inconel 738LC Oxidation Resistant Coating Layer by Pt Modified-pack Aluminizing

Inconel 738LC의 Pt Modified-pack Aluminizing 내산화 코팅의 산화저항성에 미치는 Palladium 완충층의 영향

  • Han W. K. (Div. of Materials Science and Engineering, Hanyang Univ.) ;
  • Choi J. W. (Div. of Materials Science and Engineering, Hanyang Univ.) ;
  • Hong S. J. (Div. of Materials Science and Engineering, Hanyang Univ.) ;
  • Hwang G. H. (Div. of Materials Science and Engineering, Hanyang Univ.) ;
  • Kang S. G. (Div. of Materials Science and Engineering, Hanyang Univ.)
  • Published : 2005.04.01
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Abstract

In this study, the effects of Pd buffer layer on the oxidation resistance of Pt modified-pack aluminized Inconel 738LC, used for gas turbine, were investigated. Pd was electroplated on Inconel 738LC, and Pt was electroplated on the electroplated Pd surface. Thus, the thickness of electroplated Pt/Pd was $10\;{\mu}m$ and the atomic ratio of Pt : Pd was about 6 : 4. After Pt/Pd electroplating, Inconel 738LC was pack aluminized to form the oxidation resistant layer. To investigate the oxidation resistance of Pt/Pd modified-pack aluminized Inconel 738LC, iso-thermal oxidation and cyclic oxidation were performed. The iso-thermal oxdation and the cyclic oxidation data indicated that the Pt/Pd modified-pack aluminized Inconel 738LC was more oxidation resistant than the Pt modified-pack aluminized Inconel 738LC. It was thought that the difference of thermal expansion coefficient between Inconel 738LC and Pt was lowered by the Pd buffer layer.

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