Magnetic study of Fe65Ni20Nb6B9 nanocomposite alloys

F. A. CABRERA; C. E. RODRIGUEZ TORRES; P. MENDOZA ZÉLIS; M. B. FERNÁNDEZ VAN RAAP; L. M. SOCOLOVSKY; G. A. PASQUEVICH; F. H. SÁNCHEZ

Buenos Aires

Congreso; At the Frontiers of Condensed Matter II; 2004

The procedure of quenching and subsequent annealing is a basic approach to control the microstructure of materials and thereby to achieve the optimum physical properties for the final product. Mechanical alloying is a suitable solid state technique by which novel materials may be synthesized from elemental or prealloyed powders. Both methods enable the preparation of systems consisting of magnetic nanocrystals embedded in a magnetic or non magnetic amorphous matrix. Based on the well known ductility and soft magnetic properties of Ni-Fe alloys this work investigates the thermally induced transformation of Fe65Ni20Nb6B9 disordered materials obtained from the elemental powders in a high energy planetary ball mill. The aim of this article is to present the magnetic characterization of the as-prepared and thermal treated (873 K and 900 K) samples and discuss it on the basis of their composition, structure and microstructure.