1. State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, No. 127, Youyi West Road, Xi’an 710072, P. R. China
2. Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, P. R. China
3. The Fourth Hospital of Xi’an, Xi’an Jiaotong University, No. 21, Jiefang Road, Xi’an 710004, P. R. China
4. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou 730000, P. R. China