1. Department of Advanced Materials Engineering, Chosun University, 309 Pilmun-Daero, Dong-gu, Gwangju 61452, Republic of Korea
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30 Xuyeuan Rd. 100083 Haidian district, Beijing, P.R. China
3. Department of Mechanical Engineering, Chosun University, 309 Pilmun-Daero, Dong-gu, Gwangju 61452, Republic of Korea