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Title: Local structure order in Pd78Cu6Si16 liquid

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep08277· OSTI ID:1178848
 [1];  [2];  [2];  [3];  [3];  [3];  [3];  [3];  [2];  [4];  [2];  [2];  [3]
  1. Fudan Univ., Shanghai (China). Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Dept. of Optical Science and Engineering; Ames Lab., Ames, IA (United States). Iowa State Univ., Dept. of Physics and Astronomy
  2. Ames Lab., Ames, IA (United States). Iowa State Univ., Dept. of Physics and Astronomy
  3. Fudan Univ., Shanghai (China). Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Dept. of Optical Science and Engineering
  4. Fudan Univ., Shanghai (China). Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Dept. of Optical Science and Engineering; Ames Lab., Ames, IA (United States). Iowa State Univ., Dept. of Physics and Astronomy; Key Lab. for Information Science of Electromagnetic Waves (MoE), Shanghai (China)

The short-range order (SRO) in Pd78Cu6Si16 liquid was studied by high energy x-ray diffraction and ab initio molecular dynamics (MD) simulations. The calculated pair correlation functions at different temperatures agree well with the experimental results. The partial pair correlation functions from ab intio MD simulations indicate that Si atoms prefer to be uniformly distributed while Cu atoms tend to aggregate. By performing structure analysis using Honeycutt-Andersen index, Voronoi tessellation, and atomic cluster alignment method, we show that the icosahedron and face-centered cubic SRO increase upon cooling. The dominant SRO is the Pd-centered Pd9Si2 motif, namely the structure of which motif is similar to the structure of Pd-centered clusters in the Pd9Si2 crystal. The study further confirms the existence of trigonal prism capped with three half-octahedra that is reported as a structural unit in Pd-based amorphous alloys. The majority of Cu-centered clusters are icosahedra, suggesting that the presence of Cu is benefit to promote the glass forming ability.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357; AC02-07CH11358
OSTI ID:
1178848
Alternate ID(s):
OSTI ID: 1188375
Journal Information:
Scientific Reports, Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Electrocatalytic Behavior of Hydrogenated Pd-Metallic Glass Nanofilms: Butler-Volmer, Tafel, and Impedance Analyses journal December 2019
A neutron tomography study: probing the spontaneous crystallization of randomly packed granular assemblies journal December 2018
Ultrahigh hydrogen-sorbing palladium metallic-glass nanostructures journal January 2019
Heterogeneous structural changes correlated to local atomic order in thermal rejuvenation process of Cu-Zr metallic glass journal June 2019
Ultrahigh hydrogen-sorbing palladium metallic-glass nanostructures journalarticle January 2019
Heterogeneous structural changes correlated to local atomic order in thermal rejuvenation process of Cu-Zr metallic glass text January 2019
Heterogeneous structural changes correlated to local atomic order in thermal rejuvenation process of Cu-Zr metallic glass text January 2019
A neutron tomography study: probing the spontaneous crystallization of randomly packed granular assemblies text January 2018