Liu; B.X. Kang; X.G. Cao; J.L. Huang; B. Yinand H.C. Gu (Institute of Materials Science and Engineering,Xi'an Jiaotong University, Xi'an 710049,China)(Institute of Materials Science and Engineering,Xi'an Jiaotong University, Xi'an 710049,China)( Department of Materials Engineering, Luoyang Institute of Technology, Luoyang 471049, China)( Department of Materials Engineering, Luoyang Institute of Technology, Luoyang 471049, China)( Department of Materials Engineering, Luoyang Institute of Technology, Luoyang 471049, China)( Department of Materials Engineering, Luoyang Institute of Technology, Luoyang 471049, China)