Coercivity improvement for vanadium carbide (VC) doped sintered Nd−Fe−B magnets: Effectively tuning microstructure Verbesserung der Koerzitivkraft von mit Vanadiumkarbid (VC) dotierten gesinterten Nd−Fe−B−Magneten: Effektive Abstimmung des Gefüges

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialwissenschaft und Werkstofftechnik Pub Date : 2025-03-12 DOI:10.1002/mawe.202400244

Z. Wei, L. Lele, Z. Xusheng, Y. Yang, X. Jun, M. Yanjiao, Z. Hong, L. Jitao

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Abstract

Vanadium carbide (VC) nano-particles were introduced into sintered Nd−Fe−B magnets for the purpose of grain refinement and coercivity enhancement. The effect of vanadium carbide (VC) addition on the microstructure and magnetic properties evolution of sintered Nd−Fe−B magnets was studied. Based on the characterization results, the additive vanadium carbide (VC) nano-particles mainly reacted with rare earth (RE)-rich phase to form ferrovanadium (FeV) phase, which rooted in the grain boundary. The ferrovanadium (FeV) phase inserted influence on the dissolution-precipitation process and acted as pinning sites and heterogeneous nucleation sites, which was favorable for the grain refinement. As a result, the coercivity of sintered magnets enhanced significantly from 13.62 kOe to 16.15 kOe without obvious decline of remanence when the vanadium carbide (VC) nano-particles additive amount increased from 0 wt.–% to 0.1 wt.–%. The above findings shed light on the microstructure manipulation to obtain high performance sintered magnets.

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来源期刊

Materialwissenschaft und Werkstofftechnik 工程技术-材料科学：综合

CiteScore

2.10

自引率

9.10%

发文量

154

审稿时长

4-8 weeks

期刊介绍： Materialwissenschaft und Werkstofftechnik provides fundamental and practical information for those concerned with materials development, manufacture, and testing. Both technical and economic aspects are taken into consideration in order to facilitate choice of the material that best suits the purpose at hand. Review articles summarize new developments and offer fresh insight into the various aspects of the discipline. Recent results regarding material selection, use and testing are described in original articles, which also deal with failure treatment and investigation. Abstracts of new publications from other journals as well as lectures presented at meetings and reports about forthcoming events round off the journal.