摘要
研究了晶界添加Cu_(85)Sn_(15)对(Pr,Nd)_(12.6)Dy_(0.9)Fe_(bal)B_(5.9)磁性和抗腐蚀性的影响。结果表明:Cu_(85)Sn_(15)添加量为0.16%(质量分数)时,磁体的磁性和抗腐蚀性最强。NdFeB磁性的增加主要源于材料致密化及晶界相分布均匀化,优化的组织结构也有利于材料抗腐蚀性的提高,此外,掺Cu_(85)Sn_(15)磁体中(Pr,Nd)_6Fe_(13)Cu晶界相的出现和富(Pr,Nd)相的减少,减少了晶界区域活化反应通道的形成,增大了电化学腐蚀过程中电荷迁移阻力,降低了腐蚀电流密度,增加了材料的腐蚀抗力。
Effects of Cu_（85）Sn_（15） intergranular additions on the magnetic and anti-corrosion properties of（Pr,Nd）_（12.6）Dy_（0.9）Fe_（bal）B_（5.9） were investigated.Results show that when 0.16 wt%Cu_（85）Sn_（15） is added,the NdFeB magnet possesses the maximum magnetic properties and anti-corrosion resistance.The higher magnetic properties mainly stem from the densification of the materials and the optimized distribution of intergranular phase.Also the aforementioned optimization of structure factors benefits the anti-corrosion performance of NdFeB.Additionally,in the Cu_（85）Sn_（15） doped magnet the occurrence of（Pr,Nd）_6Fe_（13）Cu and the decrease in the amount of（Pr,Nd）-rich phase reduce the active reaction channels in the anodic intergranular regions,thus increasing the charge transfer resistance.As a result,the corrosion current density decreases and the corrosion resistance is enhanced.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第8期2111-2115,共5页
Rare Metal Materials and Engineering
基金
中国博士后科学基金(2014M551899)
山东省自然科学基金(ZR2013EMM010)
山东省科技发展计划项目(2014GGX102016)
山东省高等学校科研计划项目(J15LA60)
关键词
NDFEB
磁性
腐蚀
组织结构
NdFeB
magnetic properties
corrosion
microstructure
