Structural mechanism for ultrahigh-strength Co-based metallic glasses

X. Hui; D. Y. Lin; X. H. Chen; W. Y. Wang; Y. Wang; S. L. Shang; Z. K. Liu

doi:10.1016/j.scriptamat.2012.10.030

Structural mechanism for ultrahigh-strength Co-based metallic glasses

X. Hui, D. Y. Lin, X. H. Chen, W. Y. Wang, Y. Wang, S. L. Shang, Z. K. Liu

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14 Scopus citations

Abstract

The atomic packing and electronic structure for Co₄₃Fe ₂₀Ta_5.5B_31.5 metallic glass (MG) were explored by extended X-ray absorption fine structure measurement and first-principles calculation. It is shown that the short-range order in this MG is of a (Co, Fe)B₂-like, but not (Co, Fe)₂₃B₆-like, crystallographic structure. A network-like medium-range order can be formed via the build-up of B-centered Z9 〈0, 3, 6, 0〉 Voronoi polyhedra. The intrinsic strengthening mechanism is attributed to the formation of strong covalent bonding between B and Co (Fe).

Original language	English (US)
Pages (from-to)	257-260
Number of pages	4
Journal	Scripta Materialia
Volume	68
Issue number	5
DOIs	https://doi.org/10.1016/j.scriptamat.2012.10.030
State	Published - Mar 2013

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2012.10.030

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@article{2e54b294740745789204f16506baac6e,

title = "Structural mechanism for ultrahigh-strength Co-based metallic glasses",

abstract = "The atomic packing and electronic structure for Co43Fe 20Ta5.5B31.5 metallic glass (MG) were explored by extended X-ray absorption fine structure measurement and first-principles calculation. It is shown that the short-range order in this MG is of a (Co, Fe)B2-like, but not (Co, Fe)23B6-like, crystallographic structure. A network-like medium-range order can be formed via the build-up of B-centered Z9 〈0, 3, 6, 0〉 Voronoi polyhedra. The intrinsic strengthening mechanism is attributed to the formation of strong covalent bonding between B and Co (Fe).",

author = "X. Hui and Lin, {D. Y.} and Chen, {X. H.} and Wang, {W. Y.} and Y. Wang and Shang, {S. L.} and Liu, {Z. K.}",

note = "Funding Information: The authors are grateful for the financial support of the National Nature Science Foundation of China ( 51071018 and 51271018 ). We would like to thank Shanghai Synchrotron Radiation Facility and Beijing Synchrotron Radiation Facility for the beamline and technical support. ",

year = "2013",

month = mar,

doi = "10.1016/j.scriptamat.2012.10.030",

language = "English (US)",

volume = "68",

pages = "257--260",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

number = "5",

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TY - JOUR

T1 - Structural mechanism for ultrahigh-strength Co-based metallic glasses

AU - Hui, X.

AU - Lin, D. Y.

AU - Chen, X. H.

AU - Wang, W. Y.

AU - Wang, Y.

AU - Shang, S. L.

AU - Liu, Z. K.

N1 - Funding Information: The authors are grateful for the financial support of the National Nature Science Foundation of China ( 51071018 and 51271018 ). We would like to thank Shanghai Synchrotron Radiation Facility and Beijing Synchrotron Radiation Facility for the beamline and technical support.

PY - 2013/3

Y1 - 2013/3

N2 - The atomic packing and electronic structure for Co43Fe 20Ta5.5B31.5 metallic glass (MG) were explored by extended X-ray absorption fine structure measurement and first-principles calculation. It is shown that the short-range order in this MG is of a (Co, Fe)B2-like, but not (Co, Fe)23B6-like, crystallographic structure. A network-like medium-range order can be formed via the build-up of B-centered Z9 〈0, 3, 6, 0〉 Voronoi polyhedra. The intrinsic strengthening mechanism is attributed to the formation of strong covalent bonding between B and Co (Fe).

AB - The atomic packing and electronic structure for Co43Fe 20Ta5.5B31.5 metallic glass (MG) were explored by extended X-ray absorption fine structure measurement and first-principles calculation. It is shown that the short-range order in this MG is of a (Co, Fe)B2-like, but not (Co, Fe)23B6-like, crystallographic structure. A network-like medium-range order can be formed via the build-up of B-centered Z9 〈0, 3, 6, 0〉 Voronoi polyhedra. The intrinsic strengthening mechanism is attributed to the formation of strong covalent bonding between B and Co (Fe).

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DO - 10.1016/j.scriptamat.2012.10.030

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VL - 68

SP - 257

EP - 260

JO - Scripta Materialia

JF - Scripta Materialia

IS - 5

ER -

Structural mechanism for ultrahigh-strength Co-based metallic glasses

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