Ce掺杂Nd-Fe-B永磁合金的结构及磁性能研究  

Effects of Ce Doping on the Structure and Magnetic Properties for Nd-Fe-B Alloy

作　　者：汪元亮 张国清 黄有林[1] 侯育花[1] 郭开祥 钟震晨[2] 

机构地区：[1]南昌航空大学,江西南昌330063 [2]江西理工大学,江西赣州341000

出　　处：《稀有金属材料与工程》2018年第1期146-150,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51401103;11304146;51564037);江西省自然科学基金(20151BAB216003;20151BAB212005;20161BAB206110);航空基金(2014ZF56017)资助

摘　　要：通过电弧熔炼和熔体快淬技术制备了具有不同Ce含量的(Nd_(1-x)Ce_x)_2Fe_(14)B系列合金薄带,研究发现,薄带主要由Re_2Fe_(14)B主相和一定量的α-Fe相组成。不同的甩带速度对样品的磁性能影响显著,其中甩带速度为30 m/s所制备薄带的磁性能最佳。随着Ce含量的增加,薄带的磁性能整体呈下降趋势,矫顽力从x=0时的800 kA/m下降到x=0.5时的413 kA/m。但在x=0.2时,矫顽力可达594 kA/m,呈现反常增加现象,这与物质稀释定律相反,这可能归因于Ce混合价态所导致的相分离。x=0.25时,相比未添加Ce的样品,最大磁能积几乎没有下降,这表明Ce在稀土永磁中应用潜力巨大。（Nd_（1-x）Ce_x）_2Fe_（14）Bribbons were prepared by arc melting followed by melt spinning. It is found that the ribbons are mainly composed of the main phase Re2Fe14B and a-Fe phase. The optimum magnetic properties can be obtained at the wheel velocity of 30 m/s With increasing the Ce content, the coercivity declines from 800 kA/m when x=0 to 413 anomalously high when 20% Nd is replaced by Ce. It is attributed to the phase segregation kA/m when induced by x=0.5. However, the coercivity is mixed valence state of Ce. Almost no reduction in the maximum energy product is demonstrated when x=0.25. It is suggested that Ce has a great potential application in the permanent magnetic materials

关 键 词：钕铈铁硼 熔体快淬 磁性能 

分 类 号：TM273[一般工业技术—材料科学与工程]