Polyamorphism in Yb-based metallic glass induced by pressure

Liangliang Li; Qiang Luo; Renfeng Li; Haiyan Zhao; Karena W Chapman; Peter J Chupas; Luhong Wang; Haozhe Liu

doi:10.1038/srep46762

Polyamorphism in Yb-based metallic glass induced by pressure

Sci Rep. 2017 Apr 25:7:46762. doi: 10.1038/srep46762.

Authors

Liangliang Li^{1

2}, Qiang Luo³, Renfeng Li^{1

2}, Haiyan Zhao^{4

5}, Karena W Chapman⁵, Peter J Chupas⁵, Luhong Wang¹, Haozhe Liu^{1

2}

Affiliations

¹ Harbin Institute of Technology, Harbin 150080, China.
² Center for High Pressure Science and Technology Advanced Research, Changchun 130015, China.
³ School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.
⁴ Center for Advanced Energy Studies, University of Idaho, Idaho Falls, Idaho 83406, USA.
⁵ X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.

Abstract

The Yb_62.5Zn₁₅Mg_17.5Cu₅ metallic glass is investigated using synchrotron x-ray total scattering method up to 38.4 GPa. The polyamorphic transformation from low density to high density with a transition region between 14.1 and 25.2 GPa is observed, accompanying with a volume collapse reflected by a discontinuousness of isothermal bulk modulus. This collapse is caused by that distortional icosahedron short range order precedes to perfect icosahedron, which might link to Yb 4f electron delocalization upon compression, and match the result of in situ electrical resistance measurement under high pressure conditions. This discovery in Yb-based metallic glass, combined with the previous reports on other metallic glass systems, demonstrates that pressure induced polyamorphism is the general behavior for typical lanthanide based metallic glasses.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't