1. State Key Laboratory of Powder Metallurgy
2. School of Physics and Electronics
3. Central South University
4. Changsha
5. China
6. School of Metallurgy and Environment
7. Changsha 410083
8. School of Materials Science and Engineering
9. Zhengzhou University
10. Zhengzhou 450002
11. National Synchrotron Radiation Research Center
12. Hsinchu
13. Taiwan
14. Department of Periodontics & Oral Mucosal Section
15. Xiangya Stomatological Hospital