摘要
规模化制备高性能烧结钕铁硼材料对磁体磁性能稳定性提出了很高的要求。研究了Zr和Nb添加对磁体性能稳定性的影响。结果表明:Zr添加含量增加到0.07%,磁体的烧结温度可高达1110℃,晶粒不发生异常长大,矫顽力达到1021kA/m左右,Nb的添加提高了磁体的方形度。当Nb和Zr复合添加时,制备的磁体磁性能高,性能稳定性好,最大磁能积为403.8±4.7kJ/m3,这主要是由于Zr的添加极大地降低了磁体对烧结温度的敏感性。
Producing on scale for sintered NdFeB magnets demands consistency of magnets. The effect of element Zr and Nb on consistency of magnets was investigated. It was found that as Zr content increased from 0 to 0.07at%, the sinter temperature of magnet could reach to 1110℃ with no abnormal grain growth, and coercivity increased to 1021 kA/m. And Nb addition was benefit for squareness improvement. Combined addition of Nb 0.07at% and Zr 0.07at%, the magnets showed much better properties consistency even at different positions in same furnace and the energy densities reached 403.8±4.7 kJ/m^3. It was attributed that the sensitization of sinter temperature of magnets was greatly removed by Zr and Nb addition,
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2009年第3期465-467,共3页
Rare Metal Materials and Engineering
基金
国家自然科学基金(20806093)
中国石油大学(华东)科研资助项目(Y071808)
关键词
钕铁硼
烧结温度
高性能
稳定性
NdFeB
sinter temperature
high energy
consistent properties
