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- 폴리머 몰드를 이용한 금속 나노분말의 미세부품 제조
- 이우석, 김상필, 이혜문, 배동식, 최철진
- Fabrication of Micro Component of Metallic Nano Powder Using Polymer Mold
- Woo-Seok Lee, Sang-Phil Kim, Hye-Moon Lee, Dong-Sik Bae, Chul-Jin Choi
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Journal of Korean Powder Metallurgy Institute 2007;14(3):202-207
DOI: https://doi.org/10.4150/KPMI.2007.14.3.202
2한국기계연구원 분말재료연구센터
3한국기계연구원 분말재료연구센터
4창원대학교 나노신소재공학부
5한국기계연구원 분말재료연구센터
1Powder Materials Research Center, Korea Institute of Machinery and Materials
2Powder Materials Research Center, Korea Institute of Machinery and Materials
3Powder Materials Research Center, Korea Institute of Machinery and Materials
4Ceramic Science & Engineering, Changwon National University
5Powder Materials Research Center, Korea Institute of Machinery and Materials
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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°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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