Research and Development of Bulk ANisotropic Nanograin Composite Rare Earth Permanent Magnets
Innovative and cost-effective technology for synthesizing bulk anisotropic nanograin composite rare earth magnets has been developed. Using a powder blending technique, (BH)max of nanograin composite magnets can reach 40 to 50 MGOe, while applying powder coating techniques, (BH)max = 45-55 MGOe were achieved. Thus, principal technical difficulties in synthesizing bulk anisotropic nanograin composite magnets are successfully overcome. In addition, it was observed that the magnetically soft phase in a composite magnet could be up to tens of micrometers, or more than 1000 times larger than the upper size limit predicted by the current models of interface exchange coupling, which indicates that further reducing the size of the soft phase and improving its distribution will significantly improve the magnetic performance of nanograin composite magnets.
nanograin composite magnet interface ezchange coupling Nd-Fe-B hard phase soft phase
LIU Sam LEE Don HUANG Mei-qing Ashil Higgins SHEN Yu-hui HE Youngson CHEN Christina
University of Dayton Magnetics Laboratory, 300 College Park, Dayton, OH 45469, USA UES Inc., 4401 Dayton-Xenia RD., Dayton, OH 45432, USA FutureTek USA orporation, 454 Patterson Rd, Dayton, OH 45419, USA FutureTek USA Corporation, 454 Patterson Rd, Dayton, OH 45419, USA
国际会议
北京
英文
123-135
2006-08-29（万方平台首次上网日期，不代表论文的发表时间）