Mg-Cu-Zn-Y-Zr bulk metallic glassy composite with high strength and plasticity

作     者：Wei Tian, Shujie Pang, Hua Men, Chaoli Ma, and Tao Zhang Department of Materials Science and Engineering, Beihang University, Beijing 100083, China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2007年第15卷第S1期

页      面：43-45页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work was financially supported by the National Natural Science Foundation of China (No. 50225103  50471001 and 50631010) 

主　　题：Mg-based alloy metallic glass matrix composite acicular crystalline phase strength plasticity 

摘      要：Mg65Cu20Zn5Y9Zr1 bulk metallic glass matrix composite with a diameter of 2 mm was produced by copper mold casting. Upon cooling the Mg65Cu20Zn5Y9Zr1 melt, Mg2Cu acicular crystalline phase precipitates uniformly with a size of about 20 μm long and 1 μm thick while the remaining melt undergoes glass transition. Room temperature compression tests revealed that the high fracture strength up to 830 MPa and the plastic strain of 2.4% before failure are obtained for the Mg-based bulk metallic glass matrix composite. The formation of the Mg2Cu phase was proposed to contribute to high strength and plastic deformation of the material.