Affiliation: | (1) the Department of Metallurgy and Materials Engineering, Kookmin University, 136-702 Seoul, Korea;(2) the Center for Advanced Aerospace Materials, USA;(3) the R & D Training Center, Korea Gas Corporation, Ansan, 425-150 Kyunggi-Do, Korea;(4) the Department of Mechanical Engineering, Inchun Junior College, 402-750 Inchun, Korea |