INVESTIGADORES
TAYLOR Marcela Andrea
artículos
Título:
Evolution under thermal annealing of Mn-doped Iron Disilicides obtained by Ball milling
Autor/es:
J. MARTINEZ, J. RUNCO, S.M. COTES, M.A. TAYLOR AND J. DESIMONI
Revista:
HYPERFINE INTERACTIONS
Editorial:
Springer
Referencias:
Año: 2007 vol. 178 p. 13 - 18
ISSN:
0304-3843
Resumen:
Phase formation in the Mn doped β-FeSi2 system (Fe1-xMnxSi2, with 0.00 ≤ x ≤ 0.24) was studied using X-ray diffraction and Mössbauer spectroscopy. Samples were prepared by the simultaneous mill of pure Si, Mn and Fe under Ar atmosphere followed by an annealing at 1123 K during 4 h at 1⋅ 10−7 Torr. After milling, an admixture of β-FeSi2, α-FeSi2 and ε-FeSi phases was present while α-FeSi2 disappeared after annealing, resulting β-FeSi2 the main phase. Depending on Mn concentration, small amounts of ε-FeSi and Si segregation were also observed. A preferential substitution of Fe atoms by Mn ones in the FeII site of the β-FeSi2 regular lattice was inferred from the Mössbauer results.
