Abstract
The effect of ball milling on the structural and magnetic properties of Nd2Fe14B intermetallic compound was studied by X-ray diffraction (XRD) and magnetisation measurements. The average crystallite size calculated from the XRD patterns on the powders ball milled (BM) for 40 h is seen to lie in the range of 25–50 nm, whereas the particle size estimated using atomic force microscopy imaging is in the range of 40–100 nm. Magnetisation and anisotropy of BM Nd2Fe14B were found to decrease with increasing milling time. This was explained based on the increased defect density with milling and reduction in particle size. Using a differential scanning calorimeter, recovery and recrystallisation of the BM samples were studied during heating. The Curie temperature was found to decrease with increasing milling time. The BM samples were annealed at 1173 K for 15 min, and XRD and magnetisation studies were conducted. Mechanisms of α-Fe separation and change in intrinsic properties during milling and annealing of milled powders are discussed.
Sign-in/Register to access full text options 
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.
