Probing the structure of a liquid metal during vitrification

K. Georgarakis; L. Hennet; G. A. Evangelakis; J. Antonowicz; G. B. Bokas; V. Honkimaki; A. Bytchkov; M. W. Chen; A. R. Yavari

doi:10.1016/j.actamat.2015.01.005

Probing the structure of a liquid metal during vitrification

K. Georgarakis, L. Hennet, G. A. Evangelakis, J. Antonowicz, G. B. Bokas, V. Honkimaki, A. Bytchkov, M. W. Chen, A. R. Yavari

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

32 Citations (Scopus)

Abstract

Using aerodynamic levitation, vitrification of a ternary Zr-Cu-Al alloy was observed in-situ by high energy synchrotron radiation X-ray diffraction in the temperature range from above the liquidus T_liq to well below the glass transition temperature T_g. The evolution of the atomic structure was studied using pair distribution functions (PDF) and molecular dynamic (MD) simulations. Vitrification was rendered possible due to the enhanced stability of the undercooled Zr-Cu melt after Al addition. Results indicate three regimes in the liquid alloy's structural pathway to vitrification. Short (SRO) and medium range order (MRO) develop significantly during cooling the liquid phase to the glassy state. The rate of structural rearrangements is enhanced in the super-cooled liquid between T_liq-140 K and T_g. The populations of atomic clusters with icosahedral local symmetry become predominant as T_g is approached and facilitate vitrification and suppression of crystal nucleation and growth. The scenario of a possible fragile to strong transition in the super-cooled liquid is discussed.

Original language	English
Pages (from-to)	174-186
Number of pages	13
Journal	Acta Materialia
Volume	87
DOIs	https://doi.org/10.1016/j.actamat.2015.01.005
Publication status	Published - 2015 Apr 1

Keywords

Atomic structure
Levitation
Metallic glasses
Synchrotron radiation
Vitrification

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

Access to Document

10.1016/j.actamat.2015.01.005

Cite this

@article{0ec157d1eac64a4998cc5de943b892c0,

title = "Probing the structure of a liquid metal during vitrification",

abstract = "Using aerodynamic levitation, vitrification of a ternary Zr-Cu-Al alloy was observed in-situ by high energy synchrotron radiation X-ray diffraction in the temperature range from above the liquidus Tliq to well below the glass transition temperature Tg. The evolution of the atomic structure was studied using pair distribution functions (PDF) and molecular dynamic (MD) simulations. Vitrification was rendered possible due to the enhanced stability of the undercooled Zr-Cu melt after Al addition. Results indicate three regimes in the liquid alloy's structural pathway to vitrification. Short (SRO) and medium range order (MRO) develop significantly during cooling the liquid phase to the glassy state. The rate of structural rearrangements is enhanced in the super-cooled liquid between Tliq-140 K and Tg. The populations of atomic clusters with icosahedral local symmetry become predominant as Tg is approached and facilitate vitrification and suppression of crystal nucleation and growth. The scenario of a possible fragile to strong transition in the super-cooled liquid is discussed.",

keywords = "Atomic structure, Levitation, Metallic glasses, Synchrotron radiation, Vitrification",

author = "K. Georgarakis and L. Hennet and Evangelakis, {G. A.} and J. Antonowicz and Bokas, {G. B.} and V. Honkimaki and A. Bytchkov and Chen, {M. W.} and Yavari, {A. R.}",

note = "Funding Information: Support from ANR projects “Vitrified metal implants” ( ANR-11-IS09-006-01 ) and “Vitrified metal springs” ( ANR-12-EMMA-0054 ) is gratefully acknowledged. KG acknowledges support from JSPS KAKENHI (Grant Number 25820340 ). The authors thank Prof. AL Greer for fruitful discussions. GAE thank G. Almyras for his help in computational procedure. Publisher Copyright: {\textcopyright} 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.",

year = "2015",

month = apr,

day = "1",

doi = "10.1016/j.actamat.2015.01.005",

language = "English",

volume = "87",

pages = "174--186",

journal = "Acta Materialia",

issn = "1359-6454",

publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Probing the structure of a liquid metal during vitrification

AU - Georgarakis, K.

AU - Hennet, L.

AU - Evangelakis, G. A.

AU - Antonowicz, J.

AU - Bokas, G. B.

AU - Honkimaki, V.

AU - Bytchkov, A.

AU - Chen, M. W.

AU - Yavari, A. R.

N1 - Funding Information: Support from ANR projects “Vitrified metal implants” ( ANR-11-IS09-006-01 ) and “Vitrified metal springs” ( ANR-12-EMMA-0054 ) is gratefully acknowledged. KG acknowledges support from JSPS KAKENHI (Grant Number 25820340 ). The authors thank Prof. AL Greer for fruitful discussions. GAE thank G. Almyras for his help in computational procedure. Publisher Copyright: © 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - Using aerodynamic levitation, vitrification of a ternary Zr-Cu-Al alloy was observed in-situ by high energy synchrotron radiation X-ray diffraction in the temperature range from above the liquidus Tliq to well below the glass transition temperature Tg. The evolution of the atomic structure was studied using pair distribution functions (PDF) and molecular dynamic (MD) simulations. Vitrification was rendered possible due to the enhanced stability of the undercooled Zr-Cu melt after Al addition. Results indicate three regimes in the liquid alloy's structural pathway to vitrification. Short (SRO) and medium range order (MRO) develop significantly during cooling the liquid phase to the glassy state. The rate of structural rearrangements is enhanced in the super-cooled liquid between Tliq-140 K and Tg. The populations of atomic clusters with icosahedral local symmetry become predominant as Tg is approached and facilitate vitrification and suppression of crystal nucleation and growth. The scenario of a possible fragile to strong transition in the super-cooled liquid is discussed.

AB - Using aerodynamic levitation, vitrification of a ternary Zr-Cu-Al alloy was observed in-situ by high energy synchrotron radiation X-ray diffraction in the temperature range from above the liquidus Tliq to well below the glass transition temperature Tg. The evolution of the atomic structure was studied using pair distribution functions (PDF) and molecular dynamic (MD) simulations. Vitrification was rendered possible due to the enhanced stability of the undercooled Zr-Cu melt after Al addition. Results indicate three regimes in the liquid alloy's structural pathway to vitrification. Short (SRO) and medium range order (MRO) develop significantly during cooling the liquid phase to the glassy state. The rate of structural rearrangements is enhanced in the super-cooled liquid between Tliq-140 K and Tg. The populations of atomic clusters with icosahedral local symmetry become predominant as Tg is approached and facilitate vitrification and suppression of crystal nucleation and growth. The scenario of a possible fragile to strong transition in the super-cooled liquid is discussed.

KW - Atomic structure

KW - Levitation

KW - Metallic glasses

KW - Synchrotron radiation

KW - Vitrification

UR - http://www.scopus.com/inward/record.url?scp=84921781450&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84921781450&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2015.01.005

DO - 10.1016/j.actamat.2015.01.005

M3 - Article

AN - SCOPUS:84921781450

SN - 1359-6454

VL - 87

SP - 174

EP - 186

JO - Acta Materialia

JF - Acta Materialia

ER -

Probing the structure of a liquid metal during vitrification

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this