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

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

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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 languageEnglish
Pages (from-to)615-618
Number of pages4
Issue number6
Publication statusPublished - 2011 Jan 1
Externally publishedYes


  • Atom probe
  • HDDR process
  • Hydrogen
  • Nd-Fe-B magnets

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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