Phase transformation and magnetic properties of fully dense Sm(Fe0.8Co0.2)11Ti bulk magnets
Hui-Dong Qian, Jung Tae Lim, Jong-Woo Kim, Yang Yang, Kyung Mox Cho, Jihoon Park, Chul-Jin Choi
Abstract
High density sintered Sm(Fe0.8Co0.2)11Ti bulk magnets were successfully produced using a newly developed high pressure pressing fabrication method. The purity of the hard magnetic ThMn12 phase in the bulk magnet reached to higher than 97 wt.%. The phase transformation behavior from amorphous to ThMn12 phase during heat treatment was systematically investigated by transmission electron microscopy. The remanent magnetization and maximum energy product of a bulk magnet were 96.0 emu/g and 12.22 MGOe, respectively. To the best of our knowledge, the achieved maximum energy product is the highest among all the SmFe12-based bulk magnets reported.
Topics & Concepts
Materials scienceMagnetRemanencePhase (matter)FabricationTransmission electron microscopyAmorphous solidMagnetizationHot pressingNuclear magnetic resonanceCondensed matter physicsMagnetic fieldComposite materialNanotechnologyCrystallographyMechanical engineeringChemistryPathologyAlternative medicinePhysicsOrganic chemistryMedicineEngineeringQuantum mechanicsMagnetic Properties of AlloysMagnetic properties of thin filmsMagnetic Properties and Applications