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- 전기선폭발법에 의해 카본 코팅된 Cu 나노분말의 제조 및 특성 연구
- 이희민, 박중학, 홍성모, 엄영랑, 이창규
- Fabrication and Characterization of Carbon-Coated Cu Nanopowders by Pulsed Wire Evaporation Method
- H.M. Lee, J.H. Park, S.M. Hong, Y.R. Uhm, C.K. Rhee
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Journal of Korean Powder Metallurgy Institute 2009;16(4):243-248
DOI: https://doi.org/10.4150/KPMI.2009.16.4.243
2한국원자력연구원 원자력재료연구부
3한국원자력연구원 원자력재료연구부
4한국원자력연구원 원자력재료연구부
5한국원자력연구원 원자력재료연구부
1Nuclear Materials Research Division, Korea Atomic Energy Research Institute
2Nuclear Materials Research Division, Korea Atomic Energy Research Institute
3Nuclear Materials Research Division, Korea Atomic Energy Research Institute
4Nuclear Materials Research Division, Korea Atomic Energy Research Institute
5Nuclear Materials Research Division, Korea Atomic Energy Research Institute
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Abstract
Carbon-coated Cu nanopowders with core/shell structure have been successfully fabricated by pulsed wire evaporation (PWE) method, in which a mixed gas of Ar/CH_4 (10 vol.%) was used as an ambient gas. The characterization of the samples was carried out using x-ray diffraction (XRD), scanning electron microscope (SEM), and high resolution transmission electron microscope (HRTEM). It was found that the nanoparticles show a spherical morphology with the size ranging of 10-40 nm and are covered with graphite layers of 2-4 nm. When oxygen-passivated Cu nanopowders were annealed under flowing argon gas (600 and 800°C), the crystallinity of Cu_2O phase and the particle size gradually increased. On the other hand, carbon-coated Cu nanopowders remained similar to as-prepared case with no additional oxide or carbide phases even after the annealing, indicating that the metal nanoparticles are well protected by the carbon-coating layers.
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