Identification of a Ni[subscript 0.5](Al[subscript 0.5−x]Mn[subscript x]) B2 phase at the heterophase interfaces of Cu-rich precipitates in an [alpha]-Fe matrix

Journal Article · Wed Apr 16 00:00:00 EDT 2008 · Appl. Phys. Lett.

DOI:https://doi.org/10.1063/1.2820378· OSTI ID:1007636

Kolli, R Prakash; Mao, Zugang; Seidman, David N; Keane, Denis T ^[1]

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1. NWU

A phase with the stoichiometry Ni{sub 0.5}(Al{sub 0.5-x}Mn{sub x}) is observed at heterophase interfaces of Cu-rich precipitates in an {alpha}-Fe matrix, utilizing atom-probe tomography. First-principles calculations are utilized to determine the substitutional energies, yielding E{sub Mn {yields} Ni} = 0.916 eV atom{sup -1} and E{sub Mn {yields} Al} = -0.016 eV atom{sup -1} indicating that the manganese atoms prefer substituting at Al sublattice sites instead of Ni sites. A synchrotron radiation experiment demonstrates that the identified phase possesses the B2 structure.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: USDOE
• OSTI ID: 1007636
• Journal Information: Appl. Phys. Lett., Vol. 91, Issue 2007; ISSN 0003-6951
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

43 PARTICLE ACCELERATORS
ATOMS
MANGANESE
STOICHIOMETRY
SYNCHROTRON RADIATION
TOMOGRAPHY