1. State Key Laboratory of Metal Matrix Composites
2. School of Materials Science and Engineering
3. Shanghai Jiao Tong University
4. Shanghai 200030
5. P. R. China
6. WPI Advanced Institute for Materials Research
7. Tohoku University
8. Sendai 980-8577
9. Japan
10. Key Laboratory of Polar Materials and Devices
11. East China Normal University
12. Shanghai 200062
13. China