1. State Key Laboratory of Solid LubricationLanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou Gansu 730000 People's Republic of China
2. Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of Sciences Beijing 100049 People's Republic of China
3. China Academy of Engineering PhysicsInstitute of System Engineering Mianyang Sichuan 621900 People's Republic of China