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

University of Science and Technology Beijing
Pennsylvania State University

Research output: Contribution to journal › Article › peer-review

16 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
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
Externally published	Yes

Keywords

Extended X-ray absorption fine structure
First-principles calculation
Metallic glass
Short-range ordering

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10.1016/j.scriptamat.2012.10.030

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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).",

keywords = "Extended X-ray absorption fine structure, First-principles calculation, Metallic glass, Short-range ordering",

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.\}",

year = "2013",

month = mar,

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

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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.

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).

KW - Extended X-ray absorption fine structure

KW - First-principles calculation

KW - Metallic glass

KW - Short-range ordering

UR - https://www.scopus.com/pages/publications/84871718221

U2 - 10.1016/j.scriptamat.2012.10.030

DO - 10.1016/j.scriptamat.2012.10.030

M3 - 文章

AN - SCOPUS:84871718221

SN - 1359-6462

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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Keywords

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