WANG Chun-Fang1, WANG Zhi-Shun2, LI Hong-Fei3, HAN Cui-Ping4
1. Beijing Fangshan Experimental Middle School, Beijing 102400, China;
2. China Minmetals Group Co., Ltd., Beijing 100010, China;
3. School of Materials Science and Engineering, City University of Hong Kong, Hongkong 999077, China;
4. College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China