Elemental separation in nanocrystalline Cu-Al alloys

Y. B. Wang; X. Z. Liao; Y. H. Zhao; J. C. Cooley; Z. Horita; Y. T. Zhu

doi:10.1063/1.4811157

Elemental separation in nanocrystalline Cu-Al alloys

Y. B. Wang, X. Z. Liao, Y. H. Zhao, J. C. Cooley, Z. Horita, Y. T. Zhu

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

18 Citations (Scopus)

Abstract

Nanocrystallization by high-energy severe plastic deformation has been reported to increase the solubility of alloy systems and even to mix immiscible elements to form non-equilibrium solid solutions. In this letter, we report an opposite phenomenon - nanocrystallization of a Cu-Al single-phase solid solution by high-pressure torsion separated Al from the Cu matrix when the grain sizes are refined to tens of nanometers. The Al phase was found to form at the grain boundaries of nanocrystalline Cu. The level of the separation increases with decreasing grain size, which suggests that the elemental separation was caused by the grain size effect.

Original language	English
Article number	231912
Journal	Applied Physics Letters
Volume	102
Issue number	23
DOIs	https://doi.org/10.1063/1.4811157
Publication status	Published - Jun 10 2013

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4811157

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title = "Elemental separation in nanocrystalline Cu-Al alloys",

abstract = "Nanocrystallization by high-energy severe plastic deformation has been reported to increase the solubility of alloy systems and even to mix immiscible elements to form non-equilibrium solid solutions. In this letter, we report an opposite phenomenon - nanocrystallization of a Cu-Al single-phase solid solution by high-pressure torsion separated Al from the Cu matrix when the grain sizes are refined to tens of nanometers. The Al phase was found to form at the grain boundaries of nanocrystalline Cu. The level of the separation increases with decreasing grain size, which suggests that the elemental separation was caused by the grain size effect.",

author = "Wang, {Y. B.} and Liao, {X. Z.} and Zhao, {Y. H.} and Cooley, {J. C.} and Z. Horita and Zhu, {Y. T.}",

note = "Funding Information: The authors are grateful for scientific and technical input and support from the Australian Microscopy & Microanalysis Research Facility node at the University of Sydney. The authors would like to thank Dr. C. C. Yang and Professor W. Y. Hu for their helpful discussion. This project was supported by the Australian Research Council [Grant Nos. DP120100510 (X.Z.L.) and DP110103117 (Y.B.W.)], a Grant-in-Aid for Scientific Research from the MEXT, Japan, in Innovative Areas “Bulk Nanostructured Metals” (Z.H.), and the U.S. Army Research Office and Army Research Laboratory (Y.T.Z.). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.",

year = "2013",

month = jun,

day = "10",

doi = "10.1063/1.4811157",

language = "English",

volume = "102",

journal = "Applied Physics Letters",

issn = "0003-6951",

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T1 - Elemental separation in nanocrystalline Cu-Al alloys

AU - Wang, Y. B.

AU - Liao, X. Z.

AU - Zhao, Y. H.

AU - Cooley, J. C.

AU - Horita, Z.

AU - Zhu, Y. T.

N1 - Funding Information: The authors are grateful for scientific and technical input and support from the Australian Microscopy & Microanalysis Research Facility node at the University of Sydney. The authors would like to thank Dr. C. C. Yang and Professor W. Y. Hu for their helpful discussion. This project was supported by the Australian Research Council [Grant Nos. DP120100510 (X.Z.L.) and DP110103117 (Y.B.W.)], a Grant-in-Aid for Scientific Research from the MEXT, Japan, in Innovative Areas “Bulk Nanostructured Metals” (Z.H.), and the U.S. Army Research Office and Army Research Laboratory (Y.T.Z.). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.

PY - 2013/6/10

Y1 - 2013/6/10

N2 - Nanocrystallization by high-energy severe plastic deformation has been reported to increase the solubility of alloy systems and even to mix immiscible elements to form non-equilibrium solid solutions. In this letter, we report an opposite phenomenon - nanocrystallization of a Cu-Al single-phase solid solution by high-pressure torsion separated Al from the Cu matrix when the grain sizes are refined to tens of nanometers. The Al phase was found to form at the grain boundaries of nanocrystalline Cu. The level of the separation increases with decreasing grain size, which suggests that the elemental separation was caused by the grain size effect.

AB - Nanocrystallization by high-energy severe plastic deformation has been reported to increase the solubility of alloy systems and even to mix immiscible elements to form non-equilibrium solid solutions. In this letter, we report an opposite phenomenon - nanocrystallization of a Cu-Al single-phase solid solution by high-pressure torsion separated Al from the Cu matrix when the grain sizes are refined to tens of nanometers. The Al phase was found to form at the grain boundaries of nanocrystalline Cu. The level of the separation increases with decreasing grain size, which suggests that the elemental separation was caused by the grain size effect.

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Elemental separation in nanocrystalline Cu-Al alloys

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