• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 1993년도 ACT 93
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• pp.1-15
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• 1993

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 1995년도 추계 학술발표회
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• pp.61-62
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• 1995

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 1995년도 추계 학술발표회
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• pp.88-88
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• 1995

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 1997년도 추계총회 및 학술발표회 논문집
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• pp.177-180
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• 1997

• 한국수소및신에너지학회논문집
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• 제24권5호
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• pp.367-372
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• 2013

Hydrogen storage as a metal hydride is the most promising alternative because of its relatively large hydrogen storage capacities near room temperature. TiMn2-based C14 Laves phases alloys are one of the promising hydrogen storage materials with easy activation, good hydriding-dehydriding kinetics, high hydrogen storage capacity and relatively low cost. In this work, multi-component, hyper-stoichiometric $Ti_{0.85}Zr_{0.13}(Fe_x-V)_{0.56}Mn_{1.47}Ni_{0.05}$ C14 Laves phase alloys were prepared by a vacuum induction melting for a hydrogen storage tank. Since pure vanadium (V) is quite expensive, the substitution of the V element in these alloys has been tried and some interesting results were achieved by replacing V by commercial ferrovanadium (FeV) raw material. In addition, the melt-spinning process, which was applied to the manufacturing of some of these alloys, could make the plateau slopes much flatter, which resulted in the increase of reversible hydrogen storage capacity. The improvement of sloping properties of melt-spun $Ti_{0.85}Zr_{0.13}(Fe_x-V)_{0.56}Mn_{1.47}Ni_{0.05}$ alloys was mainly attributed to the homogeneity of chemical composition.

• 공업화학
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• 제24권4호
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• pp.402-406
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• 2013

본 연구에서는 납사 크래킹 잔사유로부터 용융전기방사용 핏치가 열처리 개질 방법에 의하여 제조되었다. 개질된 핏치의 연화점과 물성은 질소유량, 열처리 온도 및 반응시간 같은 개질 조건에 따라 영향을 받았다. 이중에서 열처리온도가 핏치의 분자량 분포 및 연화점에 큰 영향력을 미쳤다. 열처리 온도가 증가함에 따라서 표면 작용기들의 분해와 고리화 반응으로 C/H 몰비와 평균분자량이 증가하였다. 또한, 벤젠 불용분(BI)과 퀴놀린 불용분(QI)값이 감소되었고, 분자량 분포의 폭이 더 좁아지는 것으로 보여주었다. 연화점이 $155^{\circ}C$인 개질 핏치로부터 용융전기방사법을 이용하여 $4.8{\mu}m$의 직경을 갖는 탄소섬유를 얻을 수 있었다. 용융전기방사법이 저섬경화 섬유를 제조하는데 기존의 용융방사법보다 더 용이할 것으로 여겨진다.

• 유변학
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• 제5권1호
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• pp.65-75
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• 1993

PP에 PE를 용융혼합하여 방사불안정성을 줄일수 있는 방사조건에 대한 연구를 수 행하였다. 연신공명에 대한 주파수 분석결과 harmonic overtone이 나타나고 연식공명의 주 기가 체류시간에 비례함을 밝혔다. PP에 PE를 혼합시킴으로써 연신공명을 줄일수 있었으나 PE가 연속상이 되는 PE함유량에서는 임계연신비보다 낮은 연신비에서 사절이 발생하였다. 또한 낮은 방사온도에서는 melt fracture 현상이 연신공명을 쉽게 일어나게 하는 용인으로 작용하여 PP/PE 혼합물의 방사 안정성을 저해하였다, 토출량이 같을 때 방사구 지름은 연 신공명의 Dmax/Dmax 값에 영향을 미치지 않았고 방사길이가 짧으면 임계연신비가 증가하였 다. 방사구 L/D가 클때에는 방사구 L/D가 연신공명에 영향을 미치지 않았으나 방사구 L/D 가 짧을 때에는 임계연신비가 크게 저하되었다.

• Journal of Electrochemical Science and Technology
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• 제9권1호
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• pp.51-59
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• 2018

Various Si-Fe-Al ternary alloys were prepared with the same amount of Si by the melt spinning technique. The feasibility of the capacity prediction approach based on the estimation of the active amount of Si using the phase diagram was practically examined and reported. These predictions were verified by the electrochemical test of fabricated coin cells and other characterization methods. The capacity prediction approach using the phase diagram might be a fundamental and efficient method to accelerate the practical application of Si-based alloys as the anode material for Li-ion batteries. The details on the prediction procedure were discussed.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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• pp.459-460
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• 2006

N-type $Bi_2Te_3-Sb_2Te_3$ solid solutions doped with 1$CdCl_2$ was prepared by melt spinning, crushing and vacuum sintering processes. Microstructure, bending strength and thermoelectric property were investigated as a function of the doping quantity from 0.03wt.% to 0.10wt.% and sintering temperature from $400^{\circ}C$ to $500^{\circ}C$, and finally compared with those of conventionally fabricated alloys. The alloy showed a good structural homogeneity as well as bending strength of $3.88Kgf/mm^2$. The highest thermoelectric figure of merit was obtained by doping 0.03wt.% and sintering at $500^{\circ}C$.

• Journal of Electrochemical Science and Technology
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• 제10권1호
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• pp.82-88
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• 2019

Here, we report on nanocrystalline Si-Al-M (M = Fe, Cu, Ni, Zr) alloys for use as an anode for lithium-ion batteries, which were fabricated via a melt-spinning method. Based on the XRD and TEM analyses, it was found that the Si-Al-M alloys consist of nanocrystalline Si grains surrounded by an amorphous matrix phase. Among the Si-Al-M alloys with different metal composition, Ni-incorporated Si-Al-M alloy electrode retained the high discharge capacity of 2492 mAh/g and exhibited improved cyclability. The superior $Li^+$ storage performance of Si-Al-M alloy with Ni component is mainly responsible for the incorporated Ni, which induces the formation of ductile and conductive inactive matrix with crystalline Al phase, in addition to the grain size reduction of active Si phase.