Abstract

Although the iron-nitride α″-Fe16N2 phase exhibits excellent magnetic properties, its poor thermal and phase stability pose challenges in the fabrication of bulk-type samples. In particular, the low nitriding temperature, below 200 °C, increases possibility of forming the stable nitride phase with higher nitrogen content on the surface due to the slow diffusion rate of nitrogen atoms. To overcome this problem, it is crucial that the α-Fe precursors are small in size, well-dispersed, and that the post-heat treatment is conducted below 200 °C. In this study, we successfully demonstrated the fabrication of α″-Fe16N2 nanofibers through electrospinning process and a two-step heat treatment procedure involving hydrogen reduction at 290 °C for 2 h, followed by nitration at 160 °C for 12 h in an ammonia gas flow rate of 1.5 L/min. Furthermore, these α″-Fe16N2 nanofibers exhibited a saturation magnetization (M2.5T) of 182 emu/g, a residual magnetization (Mr) of 76.1 emu/g, and a coercivity (Hc) of 1.29 kOe.

Full Text
Paper version not known

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 call

Disclaimer: 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.