1. Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
2. Key Laboratory of Radiation
Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing
Normal University, Beijing 100875, P. R. China
3. Institute for Advanced Materials
IAM, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510631, P.
R. China
4. Department of
Mechanical Engineering, The University of Hong Kong, Pokfulam, Hong Kong
5. Materials and Processes Department,
Research and Advanced Engineering, Ford Motor Company, Dearborn, Michigan 48121, United States
6. School of Environmental Engineering, Huazhong University of Science and Technology, Wuhan
430074, P.R. China