Atomic structure of nanoscale quasicrystal-forming Zr-noble metal binary metallic glasses

J. Saida, Keiji Itoh, T. Sanada, S. Sato, M. Imafuku, M. Ohnuma, A. Inoue

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report the results of the local structural evaluation and mechanism of QC formation in the Zr70Pd30 and Zr80Pt 20 glassy alloys. Voronoi analysis indicates the difference of local environment between two alloys. The perfect icosahedron frequently exists around Zr atom and major polyhedra have prism-like structure around Pd in Zr 70Pd30. In contrast, icosahedral-like distorted polyhedra formation is favorable around Pt as well as Zr in Zr80Pt 20. It is therefore, concluded that the quasicrystallization originates from the medium-range order based on the Zr-centered perfect icosahedron and the Pd-centered prism-like ones remain during the QC phase formation in Zr70Pd30. Icosahedral-like local structure around Zr and Pt might contribute together to the nucleation of QC phase in Zr80Pt20. This feature with a different mechanism of QC formation in the two alloys may correlate to the difference of solute concentration and the structure of stable crystalline phase after the decomposition of QC phase.

Original languageEnglish
JournalJournal of Alloys and Compounds
Volume509
Issue numberSUPPL. 1
DOIs
Publication statusPublished - Jul 14 2011

Fingerprint

Crystal atomic structure
Quasicrystals
Metallic glass
Precious metals
Prisms
Nucleation
Crystalline materials
Decomposition
Atoms

Keywords

  • Local structure
  • Metallic glasses
  • Quasicrystallization
  • Simulation
  • Zirconium-based alloy

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

Cite this

Atomic structure of nanoscale quasicrystal-forming Zr-noble metal binary metallic glasses. / Saida, J.; Itoh, Keiji; Sanada, T.; Sato, S.; Imafuku, M.; Ohnuma, M.; Inoue, A.

In: Journal of Alloys and Compounds, Vol. 509, No. SUPPL. 1, 14.07.2011.

Research output: Contribution to journalArticle

Saida, J. ; Itoh, Keiji ; Sanada, T. ; Sato, S. ; Imafuku, M. ; Ohnuma, M. ; Inoue, A. / Atomic structure of nanoscale quasicrystal-forming Zr-noble metal binary metallic glasses. In: Journal of Alloys and Compounds. 2011 ; Vol. 509, No. SUPPL. 1.
@article{bf50eeb83ec74ed282691ce28c8a2fbf,
title = "Atomic structure of nanoscale quasicrystal-forming Zr-noble metal binary metallic glasses",
abstract = "We report the results of the local structural evaluation and mechanism of QC formation in the Zr70Pd30 and Zr80Pt 20 glassy alloys. Voronoi analysis indicates the difference of local environment between two alloys. The perfect icosahedron frequently exists around Zr atom and major polyhedra have prism-like structure around Pd in Zr 70Pd30. In contrast, icosahedral-like distorted polyhedra formation is favorable around Pt as well as Zr in Zr80Pt 20. It is therefore, concluded that the quasicrystallization originates from the medium-range order based on the Zr-centered perfect icosahedron and the Pd-centered prism-like ones remain during the QC phase formation in Zr70Pd30. Icosahedral-like local structure around Zr and Pt might contribute together to the nucleation of QC phase in Zr80Pt20. This feature with a different mechanism of QC formation in the two alloys may correlate to the difference of solute concentration and the structure of stable crystalline phase after the decomposition of QC phase.",
keywords = "Local structure, Metallic glasses, Quasicrystallization, Simulation, Zirconium-based alloy",
author = "J. Saida and Keiji Itoh and T. Sanada and S. Sato and M. Imafuku and M. Ohnuma and A. Inoue",
year = "2011",
month = "7",
day = "14",
doi = "10.1016/j.jallcom.2010.12.076",
language = "English",
volume = "509",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",
number = "SUPPL. 1",

}

TY - JOUR

T1 - Atomic structure of nanoscale quasicrystal-forming Zr-noble metal binary metallic glasses

AU - Saida, J.

AU - Itoh, Keiji

AU - Sanada, T.

AU - Sato, S.

AU - Imafuku, M.

AU - Ohnuma, M.

AU - Inoue, A.

PY - 2011/7/14

Y1 - 2011/7/14

N2 - We report the results of the local structural evaluation and mechanism of QC formation in the Zr70Pd30 and Zr80Pt 20 glassy alloys. Voronoi analysis indicates the difference of local environment between two alloys. The perfect icosahedron frequently exists around Zr atom and major polyhedra have prism-like structure around Pd in Zr 70Pd30. In contrast, icosahedral-like distorted polyhedra formation is favorable around Pt as well as Zr in Zr80Pt 20. It is therefore, concluded that the quasicrystallization originates from the medium-range order based on the Zr-centered perfect icosahedron and the Pd-centered prism-like ones remain during the QC phase formation in Zr70Pd30. Icosahedral-like local structure around Zr and Pt might contribute together to the nucleation of QC phase in Zr80Pt20. This feature with a different mechanism of QC formation in the two alloys may correlate to the difference of solute concentration and the structure of stable crystalline phase after the decomposition of QC phase.

AB - We report the results of the local structural evaluation and mechanism of QC formation in the Zr70Pd30 and Zr80Pt 20 glassy alloys. Voronoi analysis indicates the difference of local environment between two alloys. The perfect icosahedron frequently exists around Zr atom and major polyhedra have prism-like structure around Pd in Zr 70Pd30. In contrast, icosahedral-like distorted polyhedra formation is favorable around Pt as well as Zr in Zr80Pt 20. It is therefore, concluded that the quasicrystallization originates from the medium-range order based on the Zr-centered perfect icosahedron and the Pd-centered prism-like ones remain during the QC phase formation in Zr70Pd30. Icosahedral-like local structure around Zr and Pt might contribute together to the nucleation of QC phase in Zr80Pt20. This feature with a different mechanism of QC formation in the two alloys may correlate to the difference of solute concentration and the structure of stable crystalline phase after the decomposition of QC phase.

KW - Local structure

KW - Metallic glasses

KW - Quasicrystallization

KW - Simulation

KW - Zirconium-based alloy

UR - http://www.scopus.com/inward/record.url?scp=79958082736&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79958082736&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2010.12.076

DO - 10.1016/j.jallcom.2010.12.076

M3 - Article

VL - 509

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

IS - SUPPL. 1

ER -