Effect of Cr on the magnetic properties and microstructure of Nd2Fe14B/α-Fe nanocomposites

✍ Scribed by W. Wang; J.S. Ni; H. Xu; B.X. Zhou; Q. Li

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 292 KB
• Volume: 403
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2008.09.007

✦ Synopsis

The magnetic properties of Nd 11 Fe 72Àx Co 8 V 1.5 Cr x B 7.5 (x ¼ 0,1) nanocomposites prepared by the crystallization of amorphous precursors have been investigated. It was found that Cr addition increases the crystallization temperature of the amorphous ribbons, resulting in the formation of a metastable phase of Nd 2 Fe 23 B 3 and improved magnetic properties. After optimal thermal treatment, the intrinsic coercivity ( J H c ) and maximum magnetic energy product ((BH) max ) increase from 780 kA/m, 68 kJ/m 3 for Nd 11 Fe 72 Co 8 V 1.5 B 7.5 sample to 903.5 kA/m, 71 kJ/m 3 for Nd 11 Fe 71 Co 8 V 1.5 Cr 1 B 7.5 sample, respectively.