INVESTIGADORES
SANCHEZ Francisco Homero
artículos
Título:
Thermal evolution of Fe65Ni20Nb6B9 nanocrystalline metastable alloy
Autor/es:
P. MENDOZA ZÉLIS, C. RODRIGUEZ TORRES, A.F. CABRERA, M. FERNÁNDEZ VAN RAAP, G.A. PASQUEVICH, F.H. SÁNCHEZ, A. GONZÁLEZ AND J.J. SUNYOL
Revista:
JOURNAL OF METASTABLE AND NANOCRYSTALLINE MATERIALS
Editorial:
Trans Tech Publications
Referencias:
Año: 2004 vol. 20 p. 571 - 575
ISSN:
1422-6375
Resumen:
The alloy Fe65Ni20Nb6B9 was obtained from the elemental constituents in a high-energy planetary ball mill and was studied by 57Fe Mössbauer effect spectroscopy, Mössbauer thermalscans and X-ray diffraction. The as prepared nanocrystalline alloy consisted primarily of metastable bcc a-Fe(Ni) nanocrystals (57 nm average size) and small amounts of g-(Fe,Ni) with Ni concentration of about 58%. Up to about 693 K only defect recovery is inferred. Between 693 and  873 K the a-phase transformed gradually into the fcc g-phase, whose starting Ni concentration decreased continuously with increasing temperature, reaching a final value which was below 32 at.%.