1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou 730050 China
2. School of Material Science and Engineering Lanzhou University of Technology Lanzhou 730050 China
3. School of Materials Engineering Lanzhou Institute of Technology Lanzhou 730050 China
4. School of Mechanical Engineering Chongqing Wuyi Technician College Chongqing 400055 China