Erbium and ytterbium solubilities and diffusivities in aluminum as determined by nanoscale characterization of precipitates

Marsha E. van Dalen; Richard A. Karnesky; Joseph R. Cabotaje; David C. Dunand; David N. Seidman

doi:10.1016/j.actamat.2009.05.007

Erbium and ytterbium solubilities and diffusivities in aluminum as determined by nanoscale characterization of precipitates

Marsha E. van Dalen^*, Richard A. Karnesky, Joseph R. Cabotaje, David C. Dunand, David N. Seidman

^*Corresponding author for this work

Materials Science and Engineering

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

132 Scopus citations

Abstract

Binary aluminum alloys with 0.03-0.06 at.% RE (RE = Yb or Er) were aged to produce coherent, nanosize Al₃RE precipitates in an α-Al matrix. The temporal evolution of precipitate radii and matrix concentrations at 300 °C were measured by transmission electron microscopy and local-electrode atom-probe tomography, respectively. The temporal dependence of the matrix concentration of each RE was utilized to determine its solubility in Al. The solubility and the coarsening rate constants were used to determine the diffusivity of each RE in α-Al and the α-Al/Al₃RE interfacial free energies at 300 °C. When compared to Sc, both Yb and Er exhibited smaller solubilities but larger diffusivities in α-Al and larger α-Al/Al₃RE interfacial energies.

Original language	English (US)
Pages (from-to)	4081-4089
Number of pages	9
Journal	Acta Materialia
Volume	57
Issue number	14
DOIs	https://doi.org/10.1016/j.actamat.2009.05.007
State	Published - Aug 2009

Funding

This research was supported by the US Department of Energy through grant DE-FG02-98ER45721. APT measurements were performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT) using a 3-D local-electrode atom-probe tomograph purchased with funding from the NSF-MRI (DMR-0420532, Dr. Charles Bouldin, monitor) and ONR-DURIP (N00014-0400798, Dr. Julie Christodoulou, monitor) programs. Research Assistant Prof. Dieter Isheim (NUCAPT) is kindly thanked for useful discussions and for managing NUCAPT. Susan Farjami and Peter Voorhees are thanked for interesting discussions and calculation of screening distances.

Keywords

Aluminum alloys
Coarsening
Diffusion
Precipitation
Rare-earth elements

ASJC Scopus subject areas

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

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10.1016/j.actamat.2009.05.007

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@article{e5dbd2c001e443b589bf2b348f0b4c88,

title = "Erbium and ytterbium solubilities and diffusivities in aluminum as determined by nanoscale characterization of precipitates",

abstract = "Binary aluminum alloys with 0.03-0.06 at.% RE (RE = Yb or Er) were aged to produce coherent, nanosize Al3RE precipitates in an α-Al matrix. The temporal evolution of precipitate radii and matrix concentrations at 300 °C were measured by transmission electron microscopy and local-electrode atom-probe tomography, respectively. The temporal dependence of the matrix concentration of each RE was utilized to determine its solubility in Al. The solubility and the coarsening rate constants were used to determine the diffusivity of each RE in α-Al and the α-Al/Al3RE interfacial free energies at 300 °C. When compared to Sc, both Yb and Er exhibited smaller solubilities but larger diffusivities in α-Al and larger α-Al/Al3RE interfacial energies.",

keywords = "Aluminum alloys, Coarsening, Diffusion, Precipitation, Rare-earth elements",

author = "{van Dalen}, {Marsha E.} and Karnesky, {Richard A.} and Cabotaje, {Joseph R.} and Dunand, {David C.} and Seidman, {David N.}",

note = "Funding Information: This research was supported by the US Department of Energy through grant DE-FG02-98ER45721. APT measurements were performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT) using a 3-D local-electrode atom-probe tomograph purchased with funding from the NSF-MRI (DMR-0420532, Dr. Charles Bouldin, monitor) and ONR-DURIP (N00014-0400798, Dr. Julie Christodoulou, monitor) programs. Research Assistant Prof. Dieter Isheim (NUCAPT) is kindly thanked for useful discussions and for managing NUCAPT. Susan Farjami and Peter Voorhees are thanked for interesting discussions and calculation of screening distances.",

year = "2009",

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doi = "10.1016/j.actamat.2009.05.007",

language = "English (US)",

volume = "57",

pages = "4081--4089",

journal = "Acta Materialia",

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AU - van Dalen, Marsha E.

AU - Karnesky, Richard A.

AU - Cabotaje, Joseph R.

AU - Dunand, David C.

AU - Seidman, David N.

N1 - Funding Information: This research was supported by the US Department of Energy through grant DE-FG02-98ER45721. APT measurements were performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT) using a 3-D local-electrode atom-probe tomograph purchased with funding from the NSF-MRI (DMR-0420532, Dr. Charles Bouldin, monitor) and ONR-DURIP (N00014-0400798, Dr. Julie Christodoulou, monitor) programs. Research Assistant Prof. Dieter Isheim (NUCAPT) is kindly thanked for useful discussions and for managing NUCAPT. Susan Farjami and Peter Voorhees are thanked for interesting discussions and calculation of screening distances.

PY - 2009/8

Y1 - 2009/8

N2 - Binary aluminum alloys with 0.03-0.06 at.% RE (RE = Yb or Er) were aged to produce coherent, nanosize Al3RE precipitates in an α-Al matrix. The temporal evolution of precipitate radii and matrix concentrations at 300 °C were measured by transmission electron microscopy and local-electrode atom-probe tomography, respectively. The temporal dependence of the matrix concentration of each RE was utilized to determine its solubility in Al. The solubility and the coarsening rate constants were used to determine the diffusivity of each RE in α-Al and the α-Al/Al3RE interfacial free energies at 300 °C. When compared to Sc, both Yb and Er exhibited smaller solubilities but larger diffusivities in α-Al and larger α-Al/Al3RE interfacial energies.

AB - Binary aluminum alloys with 0.03-0.06 at.% RE (RE = Yb or Er) were aged to produce coherent, nanosize Al3RE precipitates in an α-Al matrix. The temporal evolution of precipitate radii and matrix concentrations at 300 °C were measured by transmission electron microscopy and local-electrode atom-probe tomography, respectively. The temporal dependence of the matrix concentration of each RE was utilized to determine its solubility in Al. The solubility and the coarsening rate constants were used to determine the diffusivity of each RE in α-Al and the α-Al/Al3RE interfacial free energies at 300 °C. When compared to Sc, both Yb and Er exhibited smaller solubilities but larger diffusivities in α-Al and larger α-Al/Al3RE interfacial energies.

KW - Aluminum alloys

KW - Coarsening

KW - Diffusion

KW - Precipitation

KW - Rare-earth elements

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Erbium and ytterbium solubilities and diffusivities in aluminum as determined by nanoscale characterization of precipitates

Abstract

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Keywords

ASJC Scopus subject areas

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