J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (6): 481-486.

• Rapid Communication •     Next Articles

TiZr-base Bulk Metallic Glass with over 50 mm in Diameter

M.Q. Tang, H.F. Zhang, Z.W. Zhu, H.M. Fu, A.M. Wang, H. Li, Z.Q. Hu   

  1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
  • Received:2010-06-04 Online:2010-06-22 Published:2010-06-22
  • Supported by:

    the Ministry of Science and Technology of China (Grant No. 2006CB605201) 
    the National Natural Science Foundation of China (Grant No. 50825402)

Abstract:

Low-cost TiZr-base bulk metallic glasses (BMGs) (Ti36.1Zr 33.2Ni5.8Be24.9)100-xCux (x=5, 7 and 9) with a maximum size of over 50 mm in diameter were developed by optimizing the alloy composition. The idea is initiated by selecting a particular microstructure comprising primary β-Ti dendrite and amorphous phase. Afterwards, based on this composition of amorphous phase, a class of TiZr-base bulk metallic glasses was designed step by step to reach the optimum composition range. The glass transition temperature (Tg), initial crystallization temperature (Tx) and width of supercooled region (ΔT) of (Ti36.1Zr33.2Ni5.8Be24.9)91Cu9 BMG are 611, 655 and 44 K, respectively. The (Ti36.1Zr33.2Ni5.8Be24.9)91Cu9 BMG exhibits low density of 5.541 g·cm-3 and high compressive fracture strength of 1800 MPa, which promises the potential application
as structural materials.

Key words: TiZr-base alloy, Bulk metallic glass (BMG), Fracture strength