1. Key Laboratory of Materials Modification by Laser Ion and Electron Beams (Ministry of Education) School of Materials Science and Engineering Dalian University of Technology Dalian 116024 China
2. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou 730050 China
3. Shimadzu China Co. LTD Shanghai 200233 China
4. Department of Materials Science and Engineering City University of Hong Kong Hong Kong 999077 China
5. Department of Mechanical Engineering The Hong Kong Polytechnic University Hong Kong 999077 China
6. Department of Materials Science and Engineering The University of Tennessee Knoxville TN 37996 USA