1. Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
2. State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
3. School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
4. State Key Laboratory for Strength and Vibration, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China