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LIGA 금형몰드를 이용한 Fe-Ni계 나노분말의 초미세 가스베어링 제조
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  • LIGA 금형몰드를 이용한 Fe-Ni계 나노분말의 초미세 가스베어링 제조
저자명
손수정,조영상,김대종,김종현,장석상,최철진,Son. Soo-Jung,Cho. Young-Sang,Kim. Dae-Jung,Kim. Jong-Hyun,Chang. Suk-Sang,Choi. Chul-Jin
간행물명
한국분말야금학회지
권/호정보
2012년|19권 2호|pp.140-145 (6 pages)
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한국분말야금학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

This paper describes the manufacturing process of tilting pad gas bearing with a diameter of 5 mm and a length of 0.5-1 mm for power MEMS (Micro Electomechanical Systems) applications. The bearing compacts with nanopowder feedstock were prepared by Ni-metal mold with 2-mold system using LIGA process. The effect of the manufacturing conditions on sintering properties of nanopowder gas bearing was investigated. In this work, Fe-45 wt%Ni nanopowder with an average diameter of 30-50 nm size was used as starting material. After mixing the nanopowder and the wax-based binders, the amount of powder was controlled to obtain the certain mixing ratio. The nanopowder bearing compacts were sintered with 1-2 hr holding time under hydrogen atmospheres and under temperatures of $600^{circ}C$ to $1,000^{circ}C$. Finally, the critical batch of mixed powder system was found to be 70% particle fraction in total volume. The maximum density of the sintered bearing specimen was about 94% of theoretical density.