|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Magnetic Materials for Energy and Power Conversion Applications
||Single-crystalline Nd-Fe-B Nanoparticles via Low-energy Ball Milling
||Jeff Shield, Meiyu Wang, Li Zhang, Ye Lin
|On-Site Speaker (Planned)
Nd-Fe-B-based permanent magnets provide the highest energy products of any material. Further improvements, however, will likely be through anisotropic nanocomposite materials that combine hard and soft phases at the nanoscale. Here, we describe a low-energy ball milling process to produce single-crystalline nanoparticles of Nd2Fe14B, which then can be aligned and mixed with soft magnetic nanoparticles. The nanoparticles maintained a coercivity of above 8 kOe after milling, and high-resolution TEM confirmed the single crystal nature of the particles. The alloy was designed to promote fracture along grain boundaries, resulting in equiaxed nanoparticles of the same size as the starting material. We also utilized spark plasma sintering to both consolidate and hot deform Nd-Fe-B-based alloys, both single magnetic phase and nanocomposite materials. Grain boundary diffusion effectively produced a uniform grain structure during SPS.
||Planned: Supplemental Proceedings volume