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- Fe-8 wt%Ni 나노합금분말 사출성형체의 소결특성 및 표면조도
- 차범하, 이재성
- Surface Roughness and Sintering Characteristics of Fe-8 wt%Ni Component Fabricated by PIM
- Berm-Ha Cha, Jai-Sung Lee
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Journal of Korean Powder Metallurgy Institute 2009;16(5):342-350
DOI: https://doi.org/10.4150/KPMI.2009.16.5.342
2한양대학교 금속재료공학과
1Department of Metallurgy and Materials Science, Hanyang University
2Department of Metallurgy and Materials Science, Hanyang University
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Abstract
Development of nanoparticulate materials technology is essential to processing of highly functional nanoparticulate materials and components with small and complex shape. In this paper, the effect of particle size on surface roughness and shrinkage of sintered Fe-8 wt%Ni nanopowder components fabricated by PIM were investigated. The Fe-8 wt%Ni nanopowder was prepared by hydrogen reduction of ball-milled Fe_2O_3-NiO powder. Feedstock of nanopowder prepared with the wet-milled powder was injection molded into double gear shaped part at 120°C. After sintering, the sintered part showed near full densified microstructure having apparently no porosity (98%T.D.). Surface roughness of sintered bulk using nanopowder was less than 815 nm and it was about seven times lower than 7 mum that is typically obtainable from a sintered part produced from PIM.
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