Effect of Interfacial Segregation on Phase Decomposition of a Thin Film on a Patterned Substrate

William C. Johnson; S. M. Wise; J. Y. Huh; J. Favergeon

doi:10.1007/BF03027222

Effect of Interfacial Segregation on Phase Decomposition of a Thin Film on a Patterned Substrate

William C. Johnson, S. M. Wise, J. Y. Huh, J. Favergeon

Department of Materials Science and Engineering

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

3 Citations (Scopus)

Abstract

Numerical simulations of phase decomposition in thin films on patterned substrates are presented for a binary alloy in order to study the influence of substrate composition on microstructural evolution. For systems with a substrate composition less than the film composition, a preferential segregation of A to the interface was observed and no phase decomposition occurred within the film. For patterned systems with a substrate composition exceeding the film composition, the B-rich phase was able to grow by a barrierless transformation for a range of film compositions outside the chemical spinodal. The number of precipitates which formed on the mesa, the dihedral angles at the three-phase trijunctions, and the resulting microstructure within the film were shown to be sensitive to the substrate composition.

Original language	English
Pages (from-to)	1-8
Number of pages	8
Journal	Metals and Materials International
Volume	9
Issue number	1
DOIs	https://doi.org/10.1007/BF03027222
Publication status	Published - 2003 Feb

Keywords

Patterned substrate
Phase decomposition
Segregation
Thin film
Wetting

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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10.1007/BF03027222

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title = "Effect of Interfacial Segregation on Phase Decomposition of a Thin Film on a Patterned Substrate",

abstract = "Numerical simulations of phase decomposition in thin films on patterned substrates are presented for a binary alloy in order to study the influence of substrate composition on microstructural evolution. For systems with a substrate composition less than the film composition, a preferential segregation of A to the interface was observed and no phase decomposition occurred within the film. For patterned systems with a substrate composition exceeding the film composition, the B-rich phase was able to grow by a barrierless transformation for a range of film compositions outside the chemical spinodal. The number of precipitates which formed on the mesa, the dihedral angles at the three-phase trijunctions, and the resulting microstructure within the film were shown to be sensitive to the substrate composition.",

keywords = "Patterned substrate, Phase decomposition, Segregation, Thin film, Wetting",

author = "Johnson, {William C.} and Wise, {S. M.} and Huh, {J. Y.} and J. Favergeon",

note = "Funding Information: We are grateful for the financial support of this work by the U.S. National Science Foundation through grant DMR9902110 (WCJ, SMW), the Conseil R{\'e}gional de Bourgogne (JF), and the Korean Science and Engineering Foundation through grant R01-2001-00259 (JYH).",

year = "2003",

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T1 - Effect of Interfacial Segregation on Phase Decomposition of a Thin Film on a Patterned Substrate

AU - Johnson, William C.

AU - Wise, S. M.

AU - Huh, J. Y.

AU - Favergeon, J.

N1 - Funding Information: We are grateful for the financial support of this work by the U.S. National Science Foundation through grant DMR9902110 (WCJ, SMW), the Conseil Régional de Bourgogne (JF), and the Korean Science and Engineering Foundation through grant R01-2001-00259 (JYH).

PY - 2003/2

Y1 - 2003/2

N2 - Numerical simulations of phase decomposition in thin films on patterned substrates are presented for a binary alloy in order to study the influence of substrate composition on microstructural evolution. For systems with a substrate composition less than the film composition, a preferential segregation of A to the interface was observed and no phase decomposition occurred within the film. For patterned systems with a substrate composition exceeding the film composition, the B-rich phase was able to grow by a barrierless transformation for a range of film compositions outside the chemical spinodal. The number of precipitates which formed on the mesa, the dihedral angles at the three-phase trijunctions, and the resulting microstructure within the film were shown to be sensitive to the substrate composition.

AB - Numerical simulations of phase decomposition in thin films on patterned substrates are presented for a binary alloy in order to study the influence of substrate composition on microstructural evolution. For systems with a substrate composition less than the film composition, a preferential segregation of A to the interface was observed and no phase decomposition occurred within the film. For patterned systems with a substrate composition exceeding the film composition, the B-rich phase was able to grow by a barrierless transformation for a range of film compositions outside the chemical spinodal. The number of precipitates which formed on the mesa, the dihedral angles at the three-phase trijunctions, and the resulting microstructure within the film were shown to be sensitive to the substrate composition.

KW - Patterned substrate

KW - Phase decomposition

KW - Segregation

KW - Thin film

KW - Wetting

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