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http://dx.doi.org/10.4150/KPMI.2007.14.3.202

Fabrication of Micro Component of Metallic Nano Powder Using Polymer Mold  

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)
Publication Information
Journal of Powder Materials / v.14, no.3, 2007 , pp. 202-207 More about this Journal
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%.
Keywords
Soft mold; Nanopowder; Microcomponent; Process;
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