Abstract
In the present manuscript, the authors have systematically investigated the structural and morphological properties of a series of mechanically alloyed Fe1-xAlx (0.3 ≤ x ≤ 0.6) samples using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). All the samples, after 5 hr of milling, show crystalline structure, irrespective of the constituent concentration and are textured mainly along (110) direction. In Fe-rich samples, the formation of an off-stoichiometric Fe3Al phase is favored and in case of Al-rich samples, both Al-rich phases and clustering of Al atoms are present. Analysis of line breadths was carried out to get an insight into the interrelated effects of average crystallite size, and lattice parameters. The grain size of constituents was decreased to the nanometer range (between 6 - 8 nm) and the constituents dissolved at the nanograin boundaries. Similar conclusions were also revealed from the SEM results which show that the initial shape of particles disappeared completely, and their structure became a mixture of small and large angularshaped crystallites with different sizes. The results of this research could be directly employed in the design of deformation schedules for the industrial processing of Fe-Al alloys.
Highlights
Magnetic nanogranular systems, formed by embedding magnetic grains or clusters, in a magnetic or nonmagnetic matrix, are an important class of nanostructured magnetic materials
Mechanical alloying is capable of reducing grain size but it can lead to the following changes in the material: disordering of the lattice and modification of the crystalline structure of crystals into a more symmetric [11]
In the present work, we have systematically studied the structural evolution of Fe-Al powders mixed in the different compositions by high energy Mechanical Alloying (MA) treatment for 5 hr
Summary
Magnetic nanogranular systems, formed by embedding magnetic grains or clusters (few nanometer in size), in a magnetic or nonmagnetic matrix, are an important class of nanostructured magnetic materials. In these systems, the surface to volume ratio of the crystallites is extremely high due to nanometric dimensions of the crystallites. Along with nanostructuring and disordering, the presence of these intermediate phases would lead to interesting bulk and microscopic magnetic properties Both from the point of view of understanding the collective behaviour of the magnetic phases and possible applications, study of such intermediate phases is expected to be very rewarding. The experimental techniques used for the elemental characterization, phase transformation, changes in structural properties, morphology and grain size of mechanically alloyed powder are X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
