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Title: Structural and chemical orders in N i 64.5 Z r 35.5 metallic glass by molecular dynamics simulation

Journal Article · · Physical Review Materials
 [1];  [2];  [3];  [4];  [4];  [1];  [5];  [5]
  1. Zhejiang Univ., Hangzhou (China). College of Science, Dept. of Applied Physics; Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States); Northwestern Polytechnical Univ., Xi'an (China). MOE Key Lab. of Materials Physics and Chemistry under Extraordinary Conditions, School of Natural and Applied Sciences
  3. Northwestern Polytechnical Univ., Xi'an (China). MOE Key Lab. of Materials Physics and Chemistry under Extraordinary Conditions, School of Natural and Applied Sciences
  4. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  5. Ames Lab. and Iowa State Univ., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy

The atomic structure of Ni64.5Zr35.5 metallic glass has been investigated by molecular dynamics (MD) simulations. The calculated structure factors from the MD glassy sample at room temperature agree well with the X-ray diffraction (XRD) and neutron diffraction (ND) experimental data. Using the pairwise cluster alignment and clique analysis methods, we show that there are three types dominant short-range order (SRO) motifs around Ni atoms in the glass sample of Ni64.5Zr35.5, i.e., Mixed- Icosahedron(ICO)-Cube, Twined-Cube and icosahedron-like clusters. Furthermore, chemical order and medium-range order (MRO) analysis show that the Mixed-ICOCube and Twined-Cube clusters exhibit the characteristics of the crystalline B2 phase. In conclusion, our simulation results suggest that the weak glass-forming ability (GFA) of Ni64.5Zr35.5 can be attributed to the competition between the glass forming ICO SRO and the crystalline Mixed-ICO-Cube and Twined-Cube motifs.

Research Organization:
Ames Lab., Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-07CH11358; 11304279; 11104247; 51671160; 51271149; LY18E010007; 201608330083
OSTI ID:
1429408
Alternate ID(s):
OSTI ID: 1423920
Report Number(s):
IS-J-9608; PRMHAR; TRN: US1802476
Journal Information:
Physical Review Materials, Vol. 2, Issue 3; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Polytetrahedral structure and glass-forming ability of simulated Ni–Zr alloys journal October 2018
Effects of Si solute on the glass formation and atomic structure of Pd liquid journal February 2019
Development of a deep machine learning interatomic potential for metalloid-containing Pd-Si compounds journal November 2019
Effects of Si solute on the glass formation and atomic structure of Pd liquid text January 2018

Figures / Tables (8)