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/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.
authors.affiliation: Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8571, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Sepehri-Amin
authors.forename: T
authors.initials: T
authors.lastname: Ohkubo
authors.forename: T
authors.initials: T
authors.lastname: Nishiuchi
authors.forename: S
authors.initials: S
authors.lastname: Hirosawa
authors.forename: K
authors.initials: K
authors.lastname: Hono