Deformation behavior of SmCo nanograin magnets via amorphization and recrystallization  

作　　者：Wei Quan Longfei Ma Yanbai Chen Niuniu Wang Hubin Luo Qiang Zheng Juan Du 

机构地区：[1]Institute of Materials,School of Materials Science and Engineering,Shanghai University,Shanghai,200444,China [2]Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo,315201,China

出　　处：《Journal of Rare Earths》2025年第4期758-765,I0005,共9页稀土学报(英文版)

基　　金：supported by the National Key R&D Program of China (2023YFB3507601);the National Natural Science Foundation of China(52171184,U23A20549)。

摘　　要：In recent years,high coercivity nanocrystalline magnets based on the critical single domain size theory have received increasing attention.However,nanocrystalline magnets are difficult to enhance the remanent magnetization by forming textures with conventional magnetic field orientation.Texturing of nanocrystalline magnets is usually done using the hot pressing and hot deformation technique,but there are some difficulties in applying this technique to form texture in SmCo systems.To discover and solve the difficulties of obtaining texturized nanocrystalline magnets during the deformation process,samarium cobalt magnets with different degrees of deformation were first experimentally prepared by low strain rate hot deformation method.Then,molecular dynamics simulations were utilized to study the micro structural changes and the multi-phase formation process during hot deformation.The process of deformation together with the reason why it is difficult to form textures in SmCo systems by lowtemperature hot deformation is discussed,and the strain energy densities of SmCo multiphase in multiple directions were calculated,which gives a feasible method to form low-temperature hot deformation textures in SmCo systems experimentally.

关 键 词：Rare earths SmCo permanent magnet Phase transformation Molecular dynamics simulation Deformation texture 

分 类 号：TG146.2[一般工业技术—材料科学与工程]