Quantitative laser atom probe analyses of hydrogenation-disproportionated Nd-Fe-B powders

H. Sepehri-Amin; T. Ohkubo; T. Nishiuchi; S. Hirosawa; K. Hono

doi:10.1016/j.ultramic.2010.11.015

Quantitative laser atom probe analyses of hydrogenation-disproportionated Nd-Fe-B powders

H. Sepehri-Amin, T. Ohkubo, T. Nishiuchi, S. Hirosawa, K. Hono

International Center for Synchrotron Radiation Innovation Smart (SRIS)

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

13 Citations (Scopus)

Abstract

We report a successful atom probe tomography of hydrides in hydrogenation-disproportionated Nd-Fe-B powder using a green femtosecond laser. The atom probe specimens were prepared from one particle of powder using the focused ion beam lift-out method. The atom probe tomography taken from an α-Fe/ NdH₂ structure suggested that B and Ga (trace added element) were partitioned in the NdH₂ phase. The hydrogen concentration of 64 at% determined from the atom probe analysis was in excellent agreement with the stoichiometry of the NdH₂ phase.

Original language	English
Pages (from-to)	615-618
Number of pages	4
Journal	Ultramicroscopy
Volume	111
Issue number	6
DOIs	https://doi.org/10.1016/j.ultramic.2010.11.015
Publication status	Published - 2011

Keywords

Atom probe
HDDR process
Hydrogen
Nd-Fe-B magnets

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10.1016/j.ultramic.2010.11.015

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title = "Quantitative laser atom probe analyses of hydrogenation-disproportionated Nd-Fe-B powders",

abstract = "We report a successful atom probe tomography of hydrides in hydrogenation-disproportionated Nd-Fe-B powder using a green femtosecond laser. The atom probe specimens were prepared from one particle of powder using the focused ion beam lift-out method. The atom probe tomography taken from an α-Fe/ NdH2 structure suggested that B and Ga (trace added element) were partitioned in the NdH2 phase. The hydrogen concentration of 64 at% determined from the atom probe analysis was in excellent agreement with the stoichiometry of the NdH2 phase.",

keywords = "Atom probe, HDDR process, Hydrogen, Nd-Fe-B magnets",

author = "H. Sepehri-Amin and T. Ohkubo and T. Nishiuchi and S. Hirosawa and K. Hono",

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doi = "10.1016/j.ultramic.2010.11.015",

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T1 - Quantitative laser atom probe analyses of hydrogenation-disproportionated Nd-Fe-B powders

AU - Sepehri-Amin, H.

AU - Ohkubo, T.

AU - Nishiuchi, T.

AU - Hirosawa, S.

AU - Hono, K.

PY - 2011

Y1 - 2011

N2 - We report a successful atom probe tomography of hydrides in hydrogenation-disproportionated Nd-Fe-B powder using a green femtosecond laser. The atom probe specimens were prepared from one particle of powder using the focused ion beam lift-out method. The atom probe tomography taken from an α-Fe/ NdH2 structure suggested that B and Ga (trace added element) were partitioned in the NdH2 phase. The hydrogen concentration of 64 at% determined from the atom probe analysis was in excellent agreement with the stoichiometry of the NdH2 phase.

AB - We report a successful atom probe tomography of hydrides in hydrogenation-disproportionated Nd-Fe-B powder using a green femtosecond laser. The atom probe specimens were prepared from one particle of powder using the focused ion beam lift-out method. The atom probe tomography taken from an α-Fe/ NdH2 structure suggested that B and Ga (trace added element) were partitioned in the NdH2 phase. The hydrogen concentration of 64 at% determined from the atom probe analysis was in excellent agreement with the stoichiometry of the NdH2 phase.

KW - Atom probe

KW - HDDR process

KW - Hydrogen

KW - Nd-Fe-B magnets

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DO - 10.1016/j.ultramic.2010.11.015

M3 - Article

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EP - 618

JO - Ultramicroscopy

JF - Ultramicroscopy

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Quantitative laser atom probe analyses of hydrogenation-disproportionated Nd-Fe-B powders

Abstract

Keywords

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