Chief Editor: HUANG Bai-yun Deputy Chief Editors: QIU Guan-zhou, PENG Chao-qun Address: Editorial Office of Transactions of Nonferrous Metals Society of China Central South University, Changsha 410083, China http://www.tnmsc.cn/ Tel: +86-731-88876765 or +86-731-88877197 Fax: +86-731-88877197 E-mail: f-ysxb@mail.csu.edu.cn