Tian Wei, Pang Shujie, Men Hua, Ma Chaoli, Zhang Tao. Mg-Cu-Zn-Y-Zr bulk metallic glassy composite with high strength and plasticity, Int. J. Miner. Metall. Mater., 14 (2007), No. 7, p. 43-45.
Mg-based alloy; metallic glass matrix composite; acicular crystalline phase; strength; plasticity
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.