Investigation of viscosity and crystallization in supercooled-liquid region of Zr-based glassy alloys

Yan Li (1) , Ran Li (1) , Shujie Pang (1) , Bingqing Chen (1) , Konstantinos Georgarakis (2, 3) , Alain Le Moulec (2) , Gavin Vaughan (4) , Tao Zhang (1) , Alain R. Yavari (2)

1 School of Materials Science and Engineering
2 SIMaP - Science et Ingénierie des Matériaux et Procédés
3 WPI-AIMR - WPI Advanced Institute for Materials Research
4 ESRF - European Synchrotron Radiation Facility

Using viscosity measurement method and in-situ heating synchrotron radiation, the viscosity of the (Zr(0.55)Al(0.1)Ni(0.05)Cu(0.3))(100)-(x)Y(x). (x = 0, 0.5, 1, 2) bulk metallic glasses (BMGs) in their supercooled liquid regions (SLRs) and the in-situ heating nucleation were investigated, respectively. In the SLR, the (Zr(0.55)Al(0.1)Ni(0.05)Cu(0.3))(99)Y(1) metallic glass which shows distinct plastic strain in compression exhibits higher viscosity than the other three BMGs, however their Poisson's ratios are almost the same. The synchrotron diffraction results show that crystallization happened in the SLR of the (Zr(0.55)Al(0.1)Ni(0.05)Cu(0.3))(99)Y(1) glassy alloy, which could be the reason for the higher viscosity and larger plastic strain in compression compared to the other three alloys. The fracture surfaces of the glassy alloys were observed and analyzed. (C) 2011 Elsevier B.V. All rights reserved.

Domaines: Matériaux

Yan Li, Ran Li, Shujie Pang, Bingqing Chen, Konstantinos Georgarakis, et al.. Investigation of viscosity and crystallization in supercooled-liquid region of Zr-based glassy alloys. Journal of Non-Crystalline Solids, 2012, 2, pp.150-154. ⟨10.1016/j.jnoncrysol.2011.08.031⟩. ⟨hal-00728115⟩