低失重烧结钕铁硼磁体的研究进展.pdfVIP

34 1 稀 有 金 属 2010 1 Vol34 No1 CH INESE JOURNAL OF RARE METALS Jan2010 * 丁 勇 , 陈仁杰, 闫阿儒, 李 东 ( 中国科学院宁波材料技术与工程研究所, 江省磁性材料及其应用技术重点实验室, 江 宁波 315201) : , , , , 20 , ,, , : ; ; do:i 10. 3969/.j issn. 0258- 0 6. 2010. 01. 029 : TG132. 2 : A : 0258- 0 6( 2010) 01- 0145- 06 Progress of SinteredNdFeB MagnetswithLowWeight Loss * D ing Y ong , Chen Renjie, Y anA ru, Lee Don (Zhejiang ProvinceK ey Laboratory of M agneticM aterials and App lication Technology, N ingbo Institute of M aterials Technology and ng ineering, ChineseAcademy of Sciences, N ingbo315201, China) Abstract: S intered NdFeB m agnetswere app lied w idely because of their excellen t magnetic perform ance. At present, NdFeB m ag netsw ere the keym aterials in perm anentm agnet industry. Their poor corrosion res istance, how ever, w as am ajor mi pedmi ent for appli cation. So, how to mi prove corros ion resistancew as a key point for sintered NdFeB manu facture and app lication. The corrosion weight loss m echanism of sintered NdFeB m agnets and the process for producing low w eigh t loss of sintered NdFeB m agnetsw ere summ arized. An overview how to mi prove corrosion resistance and reducing w eight lossw as outlined. Itw as found that composition and m icrostruc tu re control of grain boundaries phase w as a key point for low w eight loss sintered NdFeB m agnets. K ey words: s intered NdFeB; corrosion resistance; low w eight loss NdFeB 1983 : , , ; , , , , ( , NdFeB ) 20 , , , , , ,