1. Key Laboratory of Material Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou450052, P. R. China
2. Shanxi Aerospace Qinghua Equipment Co., Ltd., Changzhi046012, P. R. China
3. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun130012, P. R. China
4. College of Material Science and Engineering, Liaoning Technical University, Fuxin123000, P. R. China
5. State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao066004, P. R. China