Int. J. of Microstructure and Materials Properties 2008 - Vol. 3, No.6
Structural and magnetic studies of nanocrystalline Fe
80Ni
20alloy prepared by high-energy ball milling
Abdelhamid Tafat
Laboratoire des Sciences et de Genie des Matériaux U.S.T.H.B, BP 32, Bab-Ezzouar, Algeria
Fax: ++ 213 21247169 E-mail: tafdz@yahoo.fr Ahmed Haddad
Centre de Recherche Scientifique etTechnique en Soudage et Contrôle Route Dely- Ibrahim, BP 64, Chéraga, Algeria
Fax: ++ 213 21361850
E-mail: haddad_ah@hotmail.com Said Bergheul
Département d’Aéronautique Université de Blida
BP 270 Route de Soumaa, Blida, Algeria Fax: ++ 213 25433636
E-mail: sabergheul@yahoo.fr Mohammed Azzaz
Laboratoire de Science et Génie des Matériaux U.S.T.H.B, BP 32, Bab-Ezzouar, Algeria Fax: ++ 213 21247169
E-mail: azzaz@wissal.dz
Abstract: Mechanical alloying is a powder metallurgy processing technique involving the cold welding, fracturing and rewilding of powder particles in high energy. It has been used to obtain nanocrystalline alloys. Fe-20 wt. % Ni alloys were synthesised using a planetary ball mill (Retsch PM400). X-ray Diffraction (XRD) was used to identify and characterise various phases during the milling process. It is shown that the bcc Fe(Ni) solid solution was formed after 2 h of milling. The steady state grain size is about 12 nm. Many nanostructures’
magnetic materials haveexhibited excellent soft magnetic properties, which suit so many applications. We used electromagnetic methods (hysteresis) and to characterise the variation of the residual magnetisation and the coercive field.
Keywords: structure; nanocrystalline; magnetic properties; microstructure.
