General 2.5 power law of metallic glasses

Qiaoshi Zeng; Yu Lin; Yijin Liu; Zhidan Zeng; Crystal Y Shi; Bo Zhang; Hongbo Lou; Stanislav V Sinogeikin; Yoshio Kono; Curtis Kenney-Benson; Changyong Park; Wenge Yang; Weihua Wang; Hongwei Sheng; Ho-Kwang Mao; Wendy L Mao

doi:10.1073/pnas.1525390113

General 2.5 power law of metallic glasses

Proc Natl Acad Sci U S A. 2016 Feb 16;113(7):1714-8. doi: 10.1073/pnas.1525390113. Epub 2016 Feb 1.

Authors

Qiaoshi Zeng¹, Yu Lin², Yijin Liu³, Zhidan Zeng⁴, Crystal Y Shi², Bo Zhang⁵, Hongbo Lou⁶, Stanislav V Sinogeikin⁷, Yoshio Kono⁷, Curtis Kenney-Benson⁷, Changyong Park⁷, Wenge Yang⁸, Weihua Wang⁹, Hongwei Sheng¹⁰, Ho-Kwang Mao¹¹, Wendy L Mao¹²

Affiliations

¹ Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; Department of Geological Sciences, Stanford University, Stanford, CA 94305; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025; High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439; qzeng@carnegiescience.edu hmao@carnegiescience.edu.
² Department of Geological Sciences, Stanford University, Stanford, CA 94305;
³ Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025;
⁴ Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; Department of Geological Sciences, Stanford University, Stanford, CA 94305; High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439;
⁵ School of Materials Science and Engineering & Anhui Provincial Key Lab of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei 230009, China;
⁶ Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China;
⁷ High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439;
⁸ Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439;
⁹ Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
¹⁰ Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; Department of Physics and Astronomy, George Mason University, Fairfax, VA 22030.
¹¹ Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439; High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439; qzeng@carnegiescience.edu hmao@carnegiescience.edu.
¹² Department of Geological Sciences, Stanford University, Stanford, CA 94305; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025;

Abstract

Metallic glass (MG) is an important new category of materials, but very few rigorous laws are currently known for defining its "disordered" structure. Recently we found that under compression, the volume (V) of an MG changes precisely to the 2.5 power of its principal diffraction peak position (1/q1). In the present study, we find that this 2.5 power law holds even through the first-order polyamorphic transition of a Ce68Al10Cu20Co2 MG. This transition is, in effect, the equivalent of a continuous "composition" change of 4f-localized "big Ce" to 4f-itinerant "small Ce," indicating the 2.5 power law is general for tuning with composition. The exactness and universality imply that the 2.5 power law may be a general rule defining the structure of MGs.

Keywords: atomic packing; composition effect; general structure–property relationship; polyamorphic transition; pressure effect.

Publication types

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