研究了Ti添加对Nd9.4Fe79.6-xTixBu(x=0,1,2,4,6)合金显微结构和磁性能的影响.结果表明,添加Tj能抑制Nd9.4Fe79.6-xTixB11合金中NdzFe23B3和Fe3B相的形成及a-Fe相的析出和长大,促进Nd2Fe14B相的形成.当Ti添加到一定量时,Ti能以TiB2质点的形式从合金中析出,TiB2质点能够抑制晶粒的长大,改善合金的显微结构.综合性能比较佳的Nd9.4Fe75.6Ti4B11合金薄带最佳退火工艺下剩磁Br为0.87T,矫顽力Hcj达到931 kA/m,磁能积(BH)max为115.4kJ/m3.
The effects of Ti addition on,the microstructure and magnetic properties of Nd9.4Fe79.6-xTixB11(x=0,1,2,4,6)nanocrystalline alloys were investigated.The results show that Ti addition suppresses the formation of unfavorable soft Nd2Fe23B3 and Fe3B phases,and promotes the formation of Nd2Fe14B phases.When the Ti content reaches a certain amount,Ti may precipitate as TiB2 from the alloys.TiB2 may serve as inoculants and promotes uniform nucleation,and thus increases the exchange coupling between the hard and soft phases.As a result,excellent magnetic properties of Br=0.87 T, Hvj=931 kA/m and (BH)max=115.4 kJ/m3 are achieved in Nd9.4Fe75.6Ti4B11 alloy ribbons.
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