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

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

doi:10.1016/j.ultramic.2010.11.015

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

H Sepehri-Amin, T Nishiuchi + Show 3 more

https://doi.org/10.1016/j.ultramic.2010.11.015

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Journal: Ultramicroscopy	Publication Date: Nov 19, 2010
Citations: 16

Affiliation: University of Tsukuba, National Institute for Materials Science, Hitachi (Japan), Japan Science and Technology Agency

#Focused Ion Beam Lift-out Method #Atom Probe + Show 8 more

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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/NdH(2) structure suggested that B and Ga (trace added element) were partitioned in the NdH(2) phase. The hydrogen concentration of 64 at% determined from the atom probe analysis was in excellent agreement with the stoichiometry of the NdH(2) phase.

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