| Literature DB >> 26831105 |
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.
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.Entities:
Keywords: atomic packing; composition effect; general structure–property relationship; polyamorphic transition; pressure effect
Year: 2016 PMID： 26831105 PMCID： PMC4763748 DOI： 10.1073/pnas.1525390113
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205