Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Fabrication of Micro Component of Metallic Nano Powder Using Polymer Mold

폴리머 몰드를 이용한 금속 나노분말의 미세부품 제조

  • Lee, Woo-Seok (Powder Materials Research Center, Korea Institute of Machinery and Materials) ;
  • Kim, Sang-Phil (Powder Materials Research Center, Korea Institute of Machinery and Materials) ;
  • Lee, Hye-Moon (Powder Materials Research Center, Korea Institute of Machinery and Materials) ;
  • Bae, Dong-Sik (Ceramic Science & Engineering, Changwon National University) ;
  • Choi, Chul-Jin (Powder Materials Research Center, Korea Institute of Machinery and Materials)
  • 이우석 (한국기계연구원 분말재료연구센터) ;
  • 김상필 (한국기계연구원 분말재료연구센터) ;
  • 이혜문 (한국기계연구원 분말재료연구센터) ;
  • 배동식 (창원대학교 나노신소재공학부) ;
  • 최철진 (한국기계연구원 분말재료연구센터)
  • Published : 2007.06.28
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Abstract

Novel polymer mold process for fabrication of microcomponents using metal nanopowders was developed and experimentally optimized. Polymer mold for forming green components was produced by using a hard master mold and polydimethylsiloxane (PDMS). In the preparation of metallic powder premix for the green components without any defect, 90 wt.% 17-4PH statinless steel nanopowders and 10 wt.% organic binder were mixed by a ball milling process. The green components with very clear gear shape were formed by filling the powder premix into the PDMS soft mold in surrounding at about $100^{\circ}C$. Cold isostatic pressing (CIP) was very potent process to decrease a porosity in the sintered microcomponent. The microgear fabricated by the improved process showed a good dimension tolerance of about 1.2%.

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References

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