Weiqi Chen¹, Kang Wang¹, Zhiyue Xu¹, *Tianbao Ma¹ (1. State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China (China))

*Xinchun Chen¹, Wenli Deng¹, Jianbin Luo¹ (1. Tsinghua University (China))

*HIROYUKI KOUSAKA^2,3, Shuzo Kuzuya¹, Masataka Uchiyama¹, Natsuo Horiba⁴ (1. Graduate School of Natural Science and technology, Gifu University (Japan), 2. Center for Applied Resrarch of Plasma, Faculty of Engineering, Gifu University (Japan), 3. Department of Mechanical Engineering, Faculty of Engineering, Gifu University (Japan), 4. Sanyu Tokushu Seiko Co. (Japan))

*Qian Jia¹ (1. Tsinghua University (China))

*Ting Luo¹, Xin Chun Chen¹ (1. Tsinghua University (China))

*Lei Chen¹ (1. Southwest Jiaotong University (China))