PERSONAL DE APOYO
RUNCO Jorge Marcelo
artículos
Título:
Evolution under thermal annealing of Mn-doped Iron Disilicides obtained by Ball Milling
Autor/es:
J. MARTÍNEZ; J. RUNCO; S. M. COTES; M. A. TAYLOR; J. DESIMONI
Revista:
HYPERFINE INTERACTIONS
Editorial:
Springer
Referencias:
Lugar: Dordretch; Año: 2007 vol. 178 p. 13 - 17
ISSN:
0304-3843
Resumen:
Phase formation in the Mn doped b-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 b-FeSi2, a-FeSi2 and e-FeSi phases was present while a-FeSi2 disappeared after annealing, resulting b-FeSi2 the main phase. Depending on Mn concentration, small amounts of e-FeSi and Si segregation were also observed. A preferential substitution of Fe atoms by Mn ones in the FeII site of the b-FeSi2 regular lattice was inferred from the Mössbauer results.
