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이성한(S.H. Lee),곽봉섭(B.S. Kwak),허윤석(Y.S. Heo) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
Recently the research on the particle separation is going along various method and using in a biomedical application. I have demonstrated the separation of particle using the force balance on the size different micro-particles between inertial and viscous force in a nozzle shape of microchannel. If fluid flow rate maintain high velocity(0.01~1㎧), the Reynolds number can attain very high field and ignored inertial force appear compared with viscous force. And Stokes number is relative to the radius of particle other things being equal, so I can forecast the movement of different size particles and convinced these by simulation and experiment. This technique requires only hydraulic force and has high-throughput due to the high flow rate. Thus this research is useful in the case of using a variety of size cells including circulating tumor cells(CTC) instead of particle.
Al계 하이브리드 판재의 계면접합부 미세조직이 접합 특성에 미치는 영향
이성학(S. Lee),성효경(H.K. Sung),김정수(J. Kim),이동호(D.H. Lee),권용남(Y.N. Kwon),이광석(K.S. Lee) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.10
This study was concerned with effects of interface microstructure between Al and Mg on mechanical properties of Al hybrid plate. Hybrid specimens were fabricated by using Al(All050) and Mg(AZ31) with four different heat treatments by controlling time (0, 10, 30, and 60 min) at 300℃. The yield and tensile strengths of tempered Al/Mg hybrid specimens were lower, but elongations were higher than non-heat treatment specimens, respectively. The tensile and 3 point bending properties were improved with decreasing the thickness of intermetallic layer. To develop high strength Al hybrid plates with an excellent combination of strength and elongation, reducing the formation of intermetallic layer was needed by controlling thermo-mechanical heat treatments.