Effects of Ce-substitution on magnetic properties and microstructure of Nd–Pr–Fe–B melt-spun powders

• Published in: Journal of magnetism and magnetic materials Vol. 398; pp. 96 - 100
• Main Authors: Pei, Kun, Zhang, Xing, Lin, Min, Yan, Aru
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.01.2016
• Subjects: Ce substitution; Crystallization; Curie temperature; Grain boundaries; Magnetic properties; Magnetism; Melt spinning; Melt-spun; Microstructure; Neodymium; Structure; Melt-spun; Structure; Ce substitution; Magnetic properties
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2015.09.027

The effects of Ce-substitution on the magnetic properties and microstructure of [(Nd4Pr)1−xCex]27Fe72B (x=0, 0.1, 0.24, 0.5, 0.8wt%) melt-spun powders have been investigated. The magnetic properties Br and (BH)max of Nd–Pr–Fe–B melt-spun powders decrease with the increase of Ce proportion except the [(Nd4Pr)0.76Ce0.24]27Fe72B (x=0.24) sample, in which coercivity is relatively high (Hcj=8.49kOe). It may result from the mixed valence, the fine microstructure and higher volume fraction of grain boundary phase. The α-Fe and Fe2B phases tend to increase with higher content of the Ce. Both the Curie temperature and the crystallization temperature decrease with the Ce content increasing. •The fine microstructure and obvious boundary phase lead to the relatively high Hcj.•The Tc and crystallization temperature decrease with the increase of Ce proportion.•The volume fraction of α-Fe phase tends to increase when the Ce proportion increases.•The trends of δM with H are similar for all samples with different Ce contents.