摘要
在有些场合,温度的变化很大,这就要求钕铁硼磁体具有较高的热稳定性,而传统的生产方法所生产的钕铁硼磁体不具有这样的性能。本文通过添加钴、镝、铽、铜、铌、镓等元素,改变钕铁硼晶粒的化学成分;采用SC(快淬速凝薄片)工艺,使合金的柱状晶生长良好,尺寸细小,富Nd相沿晶界均匀分布,有效地改善了合金的微观结构;采用HD(氢破制粉)工艺和双液相烧结工艺,使磁粉不但粒径分布范围窄而且外形规则。从而研制出具有低温度系数、耐高温、高耐蚀的35UH烧结钕铁硼磁体。
In some occasions,temperature changes greatly,this requires that Nd-Fe-B magnets have higher thermal stability,but they do not have this kind of performance by traditional production methods.In this article,it changes the chemical composition of NdFeB grains by adding Co,Dy,Tb,Cu,Nb,Ga;By using SC（melt-spinning quick-setting） process,the alloy columnar crystal can grow good,small size gain grains and make Nd-rich phase along the grain boundary evenly;It makes the magnetic powder have not only narrow scope of the grain size but also regulation of shape by using HD（broken hydrogen milling） process and two-liquid phase sintering process.It produces 35UH sintered Nd-Fe-B magnets with low temperature coefficient,high temperature resistance and high corrosion resistance.
出处
《金属功能材料》
CAS
2010年第3期5-8,12,共5页
Metallic Functional Materials
基金
安徽省"十一五"重点科技攻关项目(06012031A)
安徽高校省级科学研究重点项目(KJ2008A093)
关键词
钕铁硼
磁性能
稳定性
工艺
NdFeB
magnetic properties
stability
process
