|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials 2021
||Phase stability, Microstructure and Magnetic Behavior of (Sm0.12Co0.88)95Hf5−xBx Nano-composites
||Imaddin A. Al-Omari, A. Raja, T. Adhikary, G.P. Das, S. Ghosh, D.K. Satapathy, A. Oraon, J.E. Shield, S. Aich
|On-Site Speaker (Planned)
||Imaddin A. Al-Omari
The effect of Hf/B additions on phase stability, microstructure and magnetic properties of SmCo7 ribbons has been investigated with a combined approach of experimental measurements and first principle DFT calculations. A series of (Sm0.12Co0.88)95Hf5−xBx (x between 0 and 5) alloys were arc-melted followed by melt-spinning onto Cu-wheel rotating at 40 m/s. XRD indicate that the major phase is SmCo7 having meta-stable TbCu7-type structure. From the total energy calculations, the phase stability of the ribbons have been confirmed. Moreover, Hf and B addition results in an effective grain refinement; average grain size being as low as ~80 nm, which leads to significant changes increase or decrease in magnetic properties depending on the Hf/B ratio. With increasing x from 0 to 5 at.% Ms increases from 54 to 77 emu/g and the coercivity varies between 7 and 12 kOe. Experimental coercivity have been compared with the computed anisotropy energies.