Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Effect of Heat Treatment on the Microstructural Evolution of Pt-aluminide Coated Ni-based Superalloy

Pt-Aluminide로 코팅된 초내열합금의 열처리에 따른 미세조직변화

  • Joo, D. (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Park, S.H. (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Jung, Y.G. (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Lee, K.H. (Surface Engineering Department, Korea Institute of Machinery & Materials) ;
  • Kim, C.S. (Sechang Industrial)
  • 주동원 (창원대학교 공과대학 나노신소재공학부) ;
  • 박상현 (창원대학교 공과대학 나노신소재공학부) ;
  • 정연길 (창원대학교 공과대학 나노신소재공학부) ;
  • 이구현 (한국기계연구원 표면연구부) ;
  • 김창석 (세창산기)
  • Received : 2006.03.13
  • Accepted : 2006.03.10
  • Published : 2006.03.30
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Abstract

Microstructural evolution of Pt-aluminide coated Ni-based superalloy has been investigated with ductilization heat treatment. The Pt coat was prepared on the superalloy and then aluminide coating was conducted using a pack cementation process. Samples were heat-treated at $1050^{\circ}C$ for 2 hrs and the microstructure and element analysis were preformed. A various precipitated compounds were observed within the coating layer and the diffusion region in the Pt-aluminide coating and heat treatment, indicating that the bi-phase compounds of $PtAl_2$ and NiAl were performed during the Pt-aluminide coating, whereas $M_{23}C_6$, MC, $Ni_3Al$ and ${\sigma}$ phases were precipitated in the inter-diffusion region. The bi-phase compounds of $PtAl_2$ and NiAl were transformed into the single phase compound of $PtAl_2$ with the heat treatment, increasing the amount of carbide and ${\sigma}$ phase.

Keywords

References

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