Preparation and Properties of Nd-Fe-B/Fe Nanocomposite Magnets
Nd-Fe-B/α-Fe nanocomposite magnets with high magnetic properties were successfully fabricated through a sonochemical process with carbonyl iron as Fe precursor and subsequently SPS. Experimental results show that α-Fe can increase the remanence of Nd-Fe-B/α-Fe nanocomposite magnets while decrease the coercivity. The demagnetizing curve indicates that the hard and the soft phases did not coupled very well, even though the remanence was improved. The magnetic properties of Br 8.61 kGs, Hcj 8.59 kOe and (BH)max 12.05 MGOe were obtained for Nd-Fe-B/α-Fe nanocomposite magnets with the nominal Fe content of 5 wt.％. It is noted, the exchange coupling was obviously enhanced by a MA process before SPS, and the magnets properties were increased to Br 9.42 kGs and (BH)^ 14.27 MGOe for Nd-Fe-B/α-Fe nanocomposite magnets with the same Fe content.
Nd-Fe-B nanocomposite magnet sonochemistry SPS
LI Yong-li LI Bao-wei YUE Ming ZHANG Jiu-xing
Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100022, China
国际会议
北京
英文
187-191
2006-08-29（万方平台首次上网日期，不代表论文的发表时间）