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Title: An environmental transfer hub for multimodal atom probe tomography

Authors:
; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1354761
Resource Type:
Journal Article: Published Article
Journal Name:
Advanced Structural and Chemical Imaging
Additional Journal Information:
Journal Volume: 3; Journal Issue: 1; Related Information: CHORUS Timestamp: 2017-05-02 10:24:24; Journal ID: ISSN 2198-0926
Publisher:
Springer
Country of Publication:
Germany
Language:
English

Citation Formats

Perea, Daniel E., Gerstl, Stephan S. A., Chin, Jackson, Hirschi, Blake, and Evans, James. E.. An environmental transfer hub for multimodal atom probe tomography. Germany: N. p., 2017. Web. doi:10.1186/s40679-017-0045-2.
Perea, Daniel E., Gerstl, Stephan S. A., Chin, Jackson, Hirschi, Blake, & Evans, James. E.. An environmental transfer hub for multimodal atom probe tomography. Germany. doi:10.1186/s40679-017-0045-2.
Perea, Daniel E., Gerstl, Stephan S. A., Chin, Jackson, Hirschi, Blake, and Evans, James. E.. Tue . "An environmental transfer hub for multimodal atom probe tomography". Germany. doi:10.1186/s40679-017-0045-2.
@article{osti_1354761,
title = {An environmental transfer hub for multimodal atom probe tomography},
author = {Perea, Daniel E. and Gerstl, Stephan S. A. and Chin, Jackson and Hirschi, Blake and Evans, James. E.},
abstractNote = {},
doi = {10.1186/s40679-017-0045-2},
journal = {Advanced Structural and Chemical Imaging},
number = 1,
volume = 3,
place = {Germany},
year = {Tue May 02 00:00:00 EDT 2017},
month = {Tue May 02 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1186/s40679-017-0045-2

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  • Environmental control during transfer between instruments is required for specimens sensitive to air or thermal exposure to prevent morphological or chemical changes. Atom Probe Tomography is an expanding technique but commercial instruments remain limited to loading under ambient conditions. Here we describe a multifunctional environmental transfer hub allowing controlled cryogenic, atmospheric and vacuum transfer between an Atom Probe and other instruments containing separate chambers to allow downstream time-resolved in-situ studies.
  • Alnico alloys have long been used as strong permanent magnets because of their ferromagnetism and high coercivity. Understanding their structural details allows for better prediction of the resulting magnetic properties. However, quantitative three-dimensional characterization of the phase separation in these alloys is still challenged by the spatial quantification of nanoscale phases. Herein, we apply a dual tomography approach, where correlative scanning transmission electron microscopy (STEM) energy-dispersive X-ray spectroscopic (EDS) tomography and atom probe tomography (APT) are used to investigate the initial phase separation process of an alnico 8 alloy upon non-magnetic annealing. STEM-EDS tomography provides information on the morphology andmore » volume fractions of Fe–Co-rich and Νi–Al-rich phases after spinodal decomposition in addition to quantitative information of the composition of a nanoscale volume. Subsequent analysis of a portion of the same specimen by APT offers quantitative chemical information of each phase at the sub-nanometer scale. Furthermore, APT reveals small, 2–4 nm Fe-rich α 1 phases that are nucleated in the Ni-rich α 2 matrix. From this information, we show that phase separation of the alnico 8 alloy consists of both spinodal decomposition and nucleation and growth processes. Lastly, we discuss the complementary benefits and challenges associated with correlative STEM-EDS and APT.« less
  • Alnico alloys have long been used as strong permanent magnets because of their ferromagnetism and high coercivity. Understanding their structural details allows for better prediction of the resulting magnetic properties. However, quantitative three-dimensional characterization of the phase separation in these alloys is still challenged by the spatial quantification of nanoscale phases. Herein, we apply a dual tomography approach, where correlative scanning transmission electron microscopy (STEM) energy-dispersive X-ray spectroscopic (EDS) tomography and atom probe tomography (APT) are used to investigate the initial phase separation process of an alnico 8 alloy upon non-magnetic annealing. STEM-EDS tomography provides information on the morphology andmore » volume fractions of Fe–Co-rich and Νi–Al-rich phases after spinodal decomposition in addition to quantitative information of the composition of a nanoscale volume. Subsequent analysis of a portion of the same specimen by APT offers quantitative chemical information of each phase at the sub-nanometer scale. Furthermore, APT reveals small, 2–4 nm Fe-rich α 1 phases that are nucleated in the Ni-rich α 2 matrix. From this information, we show that phase separation of the alnico 8 alloy consists of both spinodal decomposition and nucleation and growth processes. Lastly, we discuss the complementary benefits and challenges associated with correlative STEM-EDS and APT.« less
  • No abstract prepared.