Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
권호 표지
DOI QR코드

DOI QR Code

A Study on the Applicability of Carbon Mold for Precision Casting of High Melting Point Metal

고융점 금속의 미소형상 정밀주조를 위한 탄소몰드의 적용성에 관한 연구

  • Ji, Chang-Wook (Energy Materials Lab, School of Materials Science and Engineering, Pusan National University) ;
  • Yi, Eun-Ju (Energy Materials Lab, School of Materials Science and Engineering, Pusan National University) ;
  • Kim, Yang-Do (Energy Materials Lab, School of Materials Science and Engineering, Pusan National University) ;
  • Rhyim, Young-Mok (Materials Characterization and Measurement Group, Korea Institute of Materials Science)
  • 지창욱 (부산대학교 재료공학과) ;
  • 이은주 (부산대학교 재료공학과) ;
  • 김양도 (부산대학교 재료공학과) ;
  • 임영목 (한국기계연구원 부설 재료연구소 재료평가연구그룹)
  • Received : 2011.02.28
  • Accepted : 2011.03.24
  • Published : 2011.04.28
Download PDF
⟨ Previous Next ⟩

Abstract

Carbon material shows relatively high strength at high temperature in vacuum atmosphere and can be easily removed as CO or $CO_2$ gas in oxidation atmosphere. Using these characteristics, we have investigated the applicability of carbon mold for precision casting of high melting point metal such as nickel. Disc shape carbon mold with cylindrical pores was prepared and Ni-base super alloy (CM247LC) was used as casting material. The effects of electroless Nickel plating on wettability and cast parameters such as temperature and pressure on castability were investigated. Furthermore, the proper condition for removal of carbon mold by evaporation in oxidation atmosphere was also examined. The SEM observation of the interface between carbon mold and casting materials (CM247LC), which was infiltrated at temperature up to $1600^{\circ}C$, revealed that there was no particular product at the interface. Carbon mold was effectively eliminated by exposure in oxygen rich atmosphere at $705^{\circ}C$ for 3 hours and oxidation of casting materials was restrained during raising and lowering the temperature by using inert gas. It means that the carbon can be applicable to precision casting as mold material.

Keywords

References

  1. Y. M. Gong, J. C. Kim, B. K. Kim, H. J. Rhu, Y. H. Lee, W. C. Kang, G. A. Lee and J. Y. Yoon: Korean Inst Of Metal And Materials, 23 (2010) 4.
  2. T. G. Zijlema, R. J. Hollman, G. J. Witkamp and G. M. Rosmalen: J. Cryst. Growth, 198.199 (1999) 789. https://doi.org/10.1016/S0022-0248(98)01189-0
  3. T. G. Zijlema, G. J. Witkamp and G. M. Van Rosmalen: J. Chem. Eng. Data, 44 (1999) 35. https://doi.org/10.1021/je9702910
  4. T. Sata: Ceram. Int., 20 (1994) 39. https://doi.org/10.1016/0272-8842(94)90007-8
  5. C. San Marchi and A. Mortensen: Acta Mater., 49 (2001) 3959. https://doi.org/10.1016/S1359-6454(01)00294-4
  6. F. Han, H. Cheng, J. Wang and Q. Wang: Scripta Mater., 50 (2004) 13. https://doi.org/10.1016/j.scriptamat.2003.09.048
  7. S.-Y. Chun, Y.-M. Rhyim, D.-H. Kim and J.-H. Lee: Journal of the Microelectronics & Packaging Society, 17 (2010) 75.
  8. Y. M. Rhyim, D. H. Kim and J. H. Lee: Korea, Kr 2010-0042958 (2010).
  9. S.-Y. Cheon, S.-Y. Park, Y.-M. Rhyim, D.-H. Kim, J.- H. Lee: Current Applied Physics, 11 (2011) 790. https://doi.org/10.1016/j.cap.2010.11.076
  10. Y. M. Rhyim and D. H. Kim: Korea, Kr 2010-0042979 (2010).
  11. J. H. E. Jeffes: Ellingham Diagrams, Encyclopedia of Materials: Science and Technology, (2008) 2751
  12. David R. GASKELL: Introduction to the Thermodynamics of Materials, Scitech (1999) 366.
  13. Thaddeus B. Massalski: Binary Alloy Phase Diagrams Second Edition, Massalski, 2 (1990) 866.