1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, P. R. China
2. Shaanxi Province Key Laboratory of Fiber Reinforced Light Composites Materials, Northwestern Polytechnical University, Xi’an 710072, P. R. China
3. Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
4. Analytical Instrumentation Facility, North Carolina State University, Raleigh, North Carolina 27695, United States