The effect of cerium doping on the microstructure and magnetic domain of (Nd, Ce)-Fe-B sintered magnets
Source abstract
Abstract
This study investigates the effect of Ce substitution on the microstructure and magnetic domain characteristics of (Nd, Ce)-Fe-B sintered magnets. The impacts of varying Ce content on the crystal structure, composition distribution, domain structure, and grain orientation were systematically analyzed. The results reveal that increasing Ce leads to a more complex domain structure, with reversed wedge-shaped domains, along with additional branching features at domain walls and a reduction in domain size. These changes result from a decrease in anisotropy with Ce incorporation. Additionally, Ce substitution increases the formation of REFe2phases at the grain boundaries. This disrupts the coupling between the main-phase and grain boundary regions, yielding a more inhomogeneous microstructure and poorer grain orientation. Electron-backscatter-diffraction-analysis demonstrates that the variation in domain deflection along thec-axis is a reliable indicator of orientation in (Nd, Ce)-Fe-B sintered magnets. These findings provide valuable insights for optimizing the microstructural design of rare-earth permanent magnets.Graphical abstractCe addition complicates the magnetic domain structure, reduces domain size, increases REFe2phases at grain boundaries, and degrades orientation in (Nd, Ce)-Fe-B magnets.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Properties of Alloys · Rare-earth and actinide compounds · Magnetic and transport properties of perovskites and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
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