| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
K-2: Fine-Tuning SmFe10V2 Magnet Performance through Microstructure Control |
| Author(s) |
Tianhong Zhou, Jihoon Park, Chul-Jin Choi, Yong-Rae Cho |
| On-Site Speaker (Planned) |
Tianhong Zhou |
| Abstract Scope |
Magnets based on SmFe12 with a tetragonal ThMn12-type phase demonstrate notable semiempirical magnetic attributes, such as robust uniaxial magnetocrystalline anisotropy and heightened magnetization. However, their utility as permanent magnets is constrained by their low coercivity (Hc), primarily due to challenges in grain boundary diffusion during manufacturing processes.
In this investigation, we utilized a low-energy ball milling technique to fabricate powders and examined the influence of milling duration on their microstructure and magnetic characteristics. The optimal Hc of 8.9 kOe was attained in bulk materials compressed from powders milled for 5 hours, featuring an average size close to 5 μm. Nevertheless, the isotropic sintered bulks displayed a maximum energy product ((BH)max) of only 2.15 MGOe. To further enhance magnetic performance, we pressed the powders in a 10 kOe magnetic field before sintering, yielding anisotropic bulks with a Mr/Ms ratio surpassing 83% and an elevated (BH)max of 7.85 MGOe. |