Hot-Deformed SmCo-Based Nanocomposite Magnet

Strong exchange coupling

Thermo-mechanical processing controls phase transformation and texture to prevent magnetic hardening failure caused by Sm-rich grain boundary phase, achieving high-performance SmCo-based nanocomposite magnets.

Teng, Yuan · Li, Yuqing · Xu, Xiaochang · Yue, Ming · Weiqiang, Liu · Zhang, Dongtao · Hongguo, Zhang · Qingmei, Lu · Weixing, Xia

Journal of Materials Science and Technology 2023

Specifications

Sm Co Fe

{'zh': '', 'en': '5'} phase but

Advantages

Precursor contains fine and dispersed Sm(Fe,Co)5 and Fe-Co grains

Low-temperature deformation forms Sm2(Co,Fe)17-H phase, stable only at small grain sizes

High-temperature deformation transforms it to large-grained Sm2(Co,Fe)17-R phase