@article{760b71de6d5d42e9b4836cbf6fbea703,
title = "Tungsten solubility in L12-ordered Al3Er and Al3Zr nanoprecipitates formed by aging in an aluminum matrix",
abstract = "The partitioning behavior of tungsten is studied in two dilute Al-Er-W and Al-Zr-W alloys aged isochronally up to 400 and 475 °C, to form L12-structured Al3Er and Al3Zr nanoprecipitates. Atom-probe tomography reveals low W solubility in the Al3Er and Al3Zr nanoprecipitates (0.071 and 0.234 at.%, respectively) and very low W solubility in the Al matrix (0.057 and 0.023 at.%, respectively), corresponding to precipitate/matrix partitioning ratios of ∼1–10. First-principles calculations demonstrate that the formation energies of substitutional W atoms in the L12 lattices are high and positive (0.66–1.73 eV.atom−1), consistent with the small W solubilities measured experimentally in these nanoprecipitates.",
keywords = "Aluminum alloys, Atom-probe tomography, Scandium, Tungsten, Zirconium",
author = "Farkoosh, {Amir R.} and Dunand, {David C.} and Seidman, {David N.}",
note = "Funding Information: We are grateful to Dr. Zugang Mao of Northwestern Universty for numerous valuable discussions. This research was supported by the Office of Naval Research ( N00014-18-1-2550 ); Dr. W. M. Mullins, grant officer. Atom-probe tomography was performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph at NUCAPT was purchased and upgraded with grants from the NSF-MRI ( DMR-0420532 ) and ONR-DURIP ( N00014-0400798 , N00014-0610539 , N00014-0910781 , N00014-1712870 ) programs. NUCAPT received support from the MRSEC program ( NSF DMR-1720139 ) at the Materials Research Center, the SHyNE Resource ( NSF ECCS-1542205 ), and the Initiative for Sustainability and Energy (ISEN) at Northwestern University . This work made use of the Materials Characterization and Imaging Facility which receives support from the MRSEC Program ( NSF DMR-1720139 ) of the Materials Research Center at Northwestern University. This work made use of the EPIC facility of Northwestern University{\textquoteright}s NUANCE Center, which has received support from the MRSEC program NSF DMR-1720139 ) at the Materials Research Center; the International Institute for Nanotechnology (IIN); and the State of Illinois , through the IIN. DNS and DCD disclose financial interests in Braidy Industries, which could potentially benefit from the outcomes of this research. Funding Information: We are grateful to Dr. Zugang Mao of Northwestern Universty for numerous valuable discussions. This research was supported by the Office of Naval Research (N00014-18-1-2550); Dr. W. M. Mullins, grant officer. Atom-probe tomography was performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph at NUCAPT was purchased and upgraded with grants from the NSF-MRI (DMR-0420532) and ONR-DURIP (N00014-0400798, N00014-0610539, N00014-0910781, N00014-1712870) programs. NUCAPT received support from the MRSEC program (NSF DMR-1720139) at the Materials Research Center, the SHyNE Resource (NSF ECCS-1542205), and the Initiative for Sustainability and Energy (ISEN) at Northwestern University. This work made use of the Materials Characterization and Imaging Facility which receives support from the MRSEC Program (NSF DMR-1720139) of the Materials Research Center at Northwestern University. This work made use of the EPIC facility of Northwestern University's NUANCE Center, which has received support from the MRSEC program NSF DMR-1720139) at the Materials Research Center; the International Institute for Nanotechnology (IIN); and the State of Illinois, through the IIN. DNS and DCD disclose financial interests in Braidy Industries, which could potentially benefit from the outcomes of this research. Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",
year = "2020",
month = apr,
day = "15",
doi = "10.1016/j.jallcom.2019.153383",
language = "English (US)",
volume = "820",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",
}