1. School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, Shanxi, P. R. China
2. Institute of New Carbon Materials, Taiyuan University of Technology, Taiyuan 030024, Shanxi, P. R. China
3. Shanxi Key Laboratory of Material Strength and Structure Impact, Taiyuan University of Technology, Taiyuan 030024, Shanxi, P. R. China