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Fabrication of Injection Molded Fe Sintered Bodies Using Nano Fe Powder

나노 Fe 분말을 이용하여 사출 성형된 Fe 소결체의 제조

  • Kim Ki-Hyun (Division of Advanced Materials Engineering, Kongju National University) ;
  • Lim Jae-Hyun (Dept. of Materials Engineering, Chungnam University) ;
  • Choi Chul-Jin (Korea Institute of Machinery and Materials) ;
  • Lee Byong-Taek (Division of Advanced Materials Engineering, Kongju National University)
  • 김기현 (공주대학교 나노소재응용공학부) ;
  • 임재균 (충남대학교 재료공학과) ;
  • 최철진 (한국기계연구원 나노분말재료그룹) ;
  • 이병택 (공주대학교 나노소재응용공학부)
  • Published : 2004.11.01

Abstract

The injection molded Fe sintered bodies were fabricated using two kinds of Fe powders haying 50 nm and $3\sim5{\mu}m$ in diameter. In the using of Fe powder having 50 nm in diameter, the comparatively dense bodies ($94\sim97\%$) were obtained even at low sintering temperature ($600\sim700^{\circ}C$), while in the sintered bodies ($1000^{\circ}C$) using $3\sim5{\mu}m$ Fe powder, their relative densities showed low values about $93\%$, although they were strongly depend on the sintering temperature and volume ratio of Fe powder and binder. In the sintered bodies using of 50 nm Fe powders, the volume shrinkage and grain size increased as the sintering temperature increased, but the values of hardness decreased. In the sample sintered at $650^{\circ}C$, the values of relative density, volume shrinkage and grain size were $96\%,\;37\%\;and\;0.97{\mu}n$, respectively and the minimum value of wear depth was obtained due to combination of fine grain and comparatively high density.

Keywords

References

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