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CoCrTa / Cr - X 자성박막의 자기적성질에 미치는 첨가원소 X의 영향
김준학(J. H. Kim),박정용(J. Y. Park),남인탁(I. T. Nam),홍양기(Y. K. Hong) 한국자기학회 1993 韓國磁氣學會誌 Vol.3 No.4
The Effects of additional element X (X = Si, Mo, Cu, Gd) on magnetic properties and microstructure of Co-l2at%Cr-2at%Ta / Cr-X magnetic thin film were investigated. The thickness changes of Cr-X underlayer and CoCrTa magnetic layer were in the range of 1000~2000 Å and 200~800 Å respectively. Substrate temperatures were controlled from 100 ℃ to 200 ℃. Increase of coercivity by about 100~200 Oe was observed in CoCrTa / Cr-X thin films compared to those without additional X element. Cu was the most effective additional element for increasing coercivity. CoCrTa / Cr-Cu thin film shows relatively high coercivity in 1500 Å underlayer thickness and 600 Å magnetic layer thickness.
ITER 일차벽의 Cu/SS Mock-up에 대한 고열부하 시험
이동원,배영덕,홍봉근,이종혁,박정용,정용환,Lee, D.W.,Bae, Y.D.,Hong, B.G.,Lee, J.H.,Park, J.Y.,Jeong, Y.H. 한국진공학회 2006 Applied Science and Convergence Technology Vol.15 No.3
ITER (International Thermonuclear Experimental Reactor) 조달용 일차벽의 제조 건전성을 검증하기 위해서, 일차벽을 구성하는 Cu/SS mock-up을 제작하여 고열부하 시험을 수행하였다. Cu/SS mock-up은 CuCrZr과 SS316L이 사용되었으며, 두 금속은 $1050^{\circ}C$, 150 MPa의 조건에서 고온등방가압법 (HIP, Hot Isostatic Pressing) 과정을 통해 접합되었다. 시험에 사용된 고열부하 장치는 일본 원자력연구소의 JEBIS (JAEA Electron Beam Irradiation Stand)를 이용하였으며, 시험 조건은 FEM 코드인 ANSYS 해석을 통해 결정하였다. 시험은 $5MW/m^2$의 고열부하를 15초간 인가하고, 30초간 냉각하는 방법으로 수행되었으며, 시험 종료 후 얻어진 시험결과와 해석결과가 잘 일치함을 확인하였다. In order to verify the integrity of the first wall (FW) of the International Thermonuclear Experimental Reactor (ITER), the fabricated Cu/SS mock-up is tested in the JAEA Electron Beam Irradiation Test Stand (JEBIS). To fabricate the Cu/SS mock-up, CuCrZr and 316L authentic stainless steel (SS316L) are used for Cu alloy and steel, respectively The hot isostatic pressing (HIP) is used as a manufacturing method with a $1050^{\circ}C$ and 150 MPa. The high heat flux (HHF) test is performed using an electron beam with a heat flux of $5MW/m^2$ and a cycle of 15-sec on time and 30-sec off time. The temperature measurement in the HHF test shows good agreement with the results obtained from ANSYS code analysis, which is used for determining the HHF test conditions.