Efficient atomic-scale kinetics through a complex heterophase interface

Laure Bourgeois, Nikhil V. Medhekar, Andrew E. Smith, Matthew Weyland, Jian Feng Nie, Christian Dwyer

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Atomic-scale imaging and first-principles modeling are applied to the heterophase interface between the Al-Cu solid solution (αCu) and θ (Al2Cu) phases. Contrary to recent studies, our observations reveal a diffuse interface of complex but well-defined structure that enables the progression from αCu to θ over a distance of ≈1 nm. We demonstrate that, surprisingly, the observed interfacial structure is not preferred on energetic grounds. Rather, the excess in interfacial energy is compensated by efficient atomic-scale kinetics of the αCu→θ phase transformation.

Original languageEnglish (US)
Article number046102
JournalPhysical Review Letters
Volume111
Issue number4
DOIs
StatePublished - Jul 25 2013
Externally publishedYes

Fingerprint

interfacial energy
kinetics
progressions
phase transformations
solid solutions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Efficient atomic-scale kinetics through a complex heterophase interface. / Bourgeois, Laure; Medhekar, Nikhil V.; Smith, Andrew E.; Weyland, Matthew; Nie, Jian Feng; Dwyer, Christian.

In: Physical Review Letters, Vol. 111, No. 4, 046102, 25.07.2013.

Research output: Contribution to journalArticle

Bourgeois, Laure ; Medhekar, Nikhil V. ; Smith, Andrew E. ; Weyland, Matthew ; Nie, Jian Feng ; Dwyer, Christian. / Efficient atomic-scale kinetics through a complex heterophase interface. In: Physical Review Letters. 2013 ; Vol. 111, No. 4.
@article{074be476d92d4e5e935f55fd80ed80d2,
title = "Efficient atomic-scale kinetics through a complex heterophase interface",
abstract = "Atomic-scale imaging and first-principles modeling are applied to the heterophase interface between the Al-Cu solid solution (αCu) and θ′ (Al2Cu) phases. Contrary to recent studies, our observations reveal a diffuse interface of complex but well-defined structure that enables the progression from αCu to θ′ over a distance of ≈1 nm. We demonstrate that, surprisingly, the observed interfacial structure is not preferred on energetic grounds. Rather, the excess in interfacial energy is compensated by efficient atomic-scale kinetics of the αCu→θ′ phase transformation.",
author = "Laure Bourgeois and Medhekar, {Nikhil V.} and Smith, {Andrew E.} and Matthew Weyland and Nie, {Jian Feng} and Christian Dwyer",
year = "2013",
month = "7",
day = "25",
doi = "10.1103/PhysRevLett.111.046102",
language = "English (US)",
volume = "111",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "4",

}

TY - JOUR

T1 - Efficient atomic-scale kinetics through a complex heterophase interface

AU - Bourgeois, Laure

AU - Medhekar, Nikhil V.

AU - Smith, Andrew E.

AU - Weyland, Matthew

AU - Nie, Jian Feng

AU - Dwyer, Christian

PY - 2013/7/25

Y1 - 2013/7/25

N2 - Atomic-scale imaging and first-principles modeling are applied to the heterophase interface between the Al-Cu solid solution (αCu) and θ′ (Al2Cu) phases. Contrary to recent studies, our observations reveal a diffuse interface of complex but well-defined structure that enables the progression from αCu to θ′ over a distance of ≈1 nm. We demonstrate that, surprisingly, the observed interfacial structure is not preferred on energetic grounds. Rather, the excess in interfacial energy is compensated by efficient atomic-scale kinetics of the αCu→θ′ phase transformation.

AB - Atomic-scale imaging and first-principles modeling are applied to the heterophase interface between the Al-Cu solid solution (αCu) and θ′ (Al2Cu) phases. Contrary to recent studies, our observations reveal a diffuse interface of complex but well-defined structure that enables the progression from αCu to θ′ over a distance of ≈1 nm. We demonstrate that, surprisingly, the observed interfacial structure is not preferred on energetic grounds. Rather, the excess in interfacial energy is compensated by efficient atomic-scale kinetics of the αCu→θ′ phase transformation.

UR - http://www.scopus.com/inward/record.url?scp=84880901566&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84880901566&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.111.046102

DO - 10.1103/PhysRevLett.111.046102

M3 - Article

AN - SCOPUS:84880901566

VL - 111

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 4

M1 - 046102

ER -