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유체 내 전기선폭발법에 의한 은 나노입자 유체의 제조 및 특성
박은주,김지순,권영순,김진천,최혜선,정용훈,Park, E.J.,Bac, L.H.,Kim, J.S.,Kwon, Y.S.,Kim, J.C.,Choi, H.S.,Chung, Y.H. 한국분말야금학회 2009 한국분말재료학회지 (KPMI) Vol.16 No.3
This paper presents a novel single-step method to prepare the Ag nanometallic particle dispersed fluid (nanofluid) by electrical explosion of wire in liquid, deionized water (DI water). X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) were used to investigate the characteristics of the Ag nanofluids. Zeta potential was also used to measure the dispersion properties of the as-prepared Ag nanofluid. Pure Ag phase was detected in the nanofluids using water. FE-SEM analysis shows that the size of the particles formed in DI water was about 88 nm and Zeta potential value was about -43.68 without any physical and chemical treatments. Thermal conductivity of the as-prepared Ag particle dispersed nanofluid shows much higher value than that of pure DI water.
이병훈,안기봉,배상원,배선우,김병기,김지순,Lee, B.H.,Ahn, K.B.,Bae, S.W.,Bae, S.W.,Khoa, H.X.,Kim, B.K.,Kim, J.S. 한국분말야금학회 2015 한국분말재료학회지 (KPMI) Vol.22 No.3
Fe-TiC composite powders were fabricated by planetary ball mill processing. Two kinds of powder mixtures were prepared from the starting materials of (a) (Fe, TiC) powders and (b) (Fe, $TiH_2$, Carbon) powders, respectively. Milling speed (300, 500 and 700 rpm) and time (1, 2, and 3 h) were varied. For (Fe, $TiH_2$, Carbon) powders, an in situ reaction synthesis of TiC after the planetary ball mill processing was added to obtain a homogeneous distribution of ultrafine TiC particulates in Fe matrix. Powder characteristics such as particle size, size distribution, shape, and mixing homogeneity were investigated.