1. School of Metallurgical and Ecological EngineeringUniversity of Science and Technology Beijing (USTB) 30 Xueyuan Road, Haidian District Beijing 100083 P. R. China
2. Beijing Key Laboratory of Special Melting and Preparation of High-End Metal MaterialsUniversity of Science and Technology Beijing (USTB) 30 Xueyuan Road, Haidian District Beijing 100083 P. R. China