1. State Key Laboratory of Solidification Processing, Center for Advanced Lubrication and Seal Materials, School of Material Science and Engineering, Northwestern Polytechnical University, 127 YouYi Western Road, Xi’an, Shaanxi 710072, China
2. Queen Mary University of London Engineering School, Northwestern Polytechnical University, 127 YouYi Western Road, Xi’an, Shaanxi 710072, China