1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, P. R. China
2. Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong
3. Orthopedic Medicine Department of the General Hospital of the People’s Liberation Army, Beijing 100048, P. R. China
4. Department of Orthopedics Cine, Xijing Hospital, The Fourth Military Medical University, Xi’an 710032, P. R. China
5. Faculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Functional Materials of Baoji, Baoji University of Arts and Sciences, 1 Hi-Tech Avenue, Baoji 721013, P. R. China