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Effects of Substrate materials on SiC Film Coating by RF Sputtering System
윤한기(HanKi Yoon),문승현(Hyun Moon),김태규(TaeGyu Kim),무라카미 리이치(Ri-Ichi Murakama) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Silicon carbide thin film was coated onto 3 types of materials by RF sputtering system. The substrates were graphite, si and sapphire. Surface roughness of substrate was polished by wet polishing. Coating conditions were 200 W of RF power and 3 mTorr pressure of argon gas. Deposition time was 3 hours in 600℃ temperature. Specimens were heat treated in 1200℃ vacuum chamber. XRD was used for detecting the coated SiC thin film by thin film mode. FE-SEM was used to characterize the microstructure of SiC coating film.
윤한기(Hanki Yoon),조승연(Seongyeon Cho),정용환(Yonghan Jeong) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.2
Testing blanket concept in the integrated fusion environment is one of the principal objective of ITER. Blanket test modules will be intended in ITER from its operation and will be provide the first experimented data on the feasibility of the D-T cycle for fusion. In the Dual Coolant Lead Lithium(DCLL) blanket, the key element is the Flow Channel Insert(FCI) made of a silicon carbide and composite(SiCf/SiC), which serves as electric and thermal insulator. Therefore, the idea of using FCI as both electric and thermal insulator takes center place in ITER blanket concept, with Pb-17Li as a breeder and SiC ceramic and ferrite steel as a structural material. In this specials session, the trend of the design concept and R&D of fusion blanket material are introduced.
Innovative reverse-electrodialysis power generation system for carbon capture and utilization
Kim, Hanki,Kim, Young-Eun,Jeong, Nam-Jo,Hwang, Kyo-Sik,Han, Ji-Hyung,Nam, Joo-Youn,Jwa, Eunjin,Nam, Sung-Chan,Park, Sung-Youl,Yoon, Yeo-Il,Kim, Chan-Soo Elsevier 2017 Journal of CO2 Utilization Vol.20 No.-
<P><B>Abstract</B></P> <P>Global warming has become a serious threat biosphere and effective measures are required to mitigate its intensification. To this end, carbon capture and sequestration (CCS) is a promising technology, while post-combustion capture (PCC) has been developed from CCS. However, an energy penalty during the regeneration step of the CO<SUB>2</SUB> absorbent has remained a critical problem. In the present study, a lab-scale test was conducted on carbon capture with reverse-electrodialysis (CCRED) to evaluate its potential to overcome the technical and economic drawbacks of CCS and RED. The results show that a normalized peak power density of 1W/m<SUP>2</SUP>, equal to 328.6kJ/kgCO<SUB>2</SUB>, could be obtained. The peak power density was 2000-fold higher than that in previous studies. By utilizing CO<SUB>2</SUB> as an energy source in CCRED, this novel process can compensate for the energy penalty in conventional CCS.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Lab-scale carbon capture with reverse-electrodialysis (CCRED) test was conducted to overcome the drawbacks of CCS and RED. </LI> <LI> Normalized peak power density of 1W/m<SUP>2</SUP>, equal to 328.6kJ/kgCO<SUB>2</SUB>, could be obtained from lab-scale CCRED unit. </LI> <LI> The peak power density was 2000-folded higher than in previous studies. </LI> </UL> </P>
Tensile Property and Residual Stresses in Dissimilar Aluminiums Friction Stir Welding
Kelimu Tulugan,WonJun Lee,HanKi Yoon,WonJo Park,SunChul Huh 대한조선학회 2012 대한조선학회 학술대회자료집 Vol.2012 No.5
Friction stir welding has the advantage that many of the welding parameters, e.g. tool design, rotation speed and travelling speed, can be controlled in a precise manner, thus controlling the energy input into the system. Therefore, the micro-structure of the welding aluminium were tested, the residual stresses induced by the friction stir welding process conducted with 500rpm and 100mm/min was also measured. The stresses in the test specimen peaked at -9Mpa and had the conventional "M" profile.
Tensile Property and Residual Stresses in Dissimilar Aluminiums Friction Stir Welding
Kelimu Tulugan,WonJun Lee,HanKi Yoon,SunChul Huh,WonJo Park 한국해양환경·에너지학회 2012 한국해양환경공학회 학술대회논문집 Vol.2012 No.5
Friction stir welding has the advantage that many of the welding parameters, eg. tool design, rotation speed and travelling speed, can be contralled in a precise manner, thus controlling the energy input into the system. Therefore, the micro-structure of the welding aluminium were tested, the residual stresses induced by the friction stir welding process conducted with 500rpm and 100mm/min was also measured. The stresses in the test specimen peaked at -9Mpa and had the conventional "M" profile.