Al、Mn掺杂对FeCoNiSiB高熵合金的非晶形成能力和磁性能的影响  

Effect of Al and Mn doping on amorphous forming ability andmagnetic properties ofFeCoNiSiB high entropy alloy

作　　者：吉丽 杨斯蒙 俞然 欧阳跃 JI Li;YANG Simeng;YU Ran;OUYANG Yue(School of Material Science and Engineering,Nanchang Hangkong University,Nanchang Jiangxi 330063,China;China Railway Nanchang Group Co.Ltd,Nanchang Jiangxi 330002,China)

机构地区：[1]南昌航空大学材料科学与工程学院,南昌330063 [2]中国铁路南昌局集团有限公司,南昌330002

出　　处：《功能材料》2024年第11期11132-11136,共5页Journal of Functional Materials

基　　金：国家自然科学基金(地区)项目(AA202201029)。

摘　　要：为进一步优化高熵非晶软磁合金的磁学性能,以FeCoNiSiB高熵非晶合金为基础,分析Al、Mn元素共同掺杂及Mn元素掺杂浓度对于合金的非晶形成能力和磁性能的影响规律。结果表明,含有Al元素的合金条带均发生了部分晶化的现象,当Al含量为10%(原子分数)时晶化最为严重,而晶化析出的α-Fe(Si)纳米晶粒尺寸要小于铁磁交换作用长度Lex,晶粒间的交换相互作用所产生的平滑效应失效,磁晶各向异性变大,导致其矫顽力相对较高;而单独添加Mn元素后所得的条带均为非晶态,Mn元素的掺杂使高熵非晶合金具有更加协调的原子构型,有效提高高熵合金的非晶形成能力和磁性能,当Mn掺杂量为10%和15%时,均具有相对较低的矫顽力(<2 A/m)。In order to further optimize the magnetic properties of high entropy amorphous soft magnetic alloy,the co-doping of Al and Mn elements and the influence of Mn doping concentration on the amorphous forming ability and magnetic properties of the alloy were analyzed based on FeCoNiSiB.The results indicate that the alloy ribbons containing Al element have all experienced partial crystallization,and the crystallization is most severe when the Al content is 10at%.The size ofα-Fe(Si)nanoparticles formed by crystallization is smaller than the ferromagnetic exchange length Lex,and the smoothing effect caused by the exchange interaction between grains fails,leading to an increase in magnetocrystalline anisotropy and coercive force.The doping of Mn makes the high entropy amorphous alloy have A more coordinated atomic configuration,and effectively improves the amorphous formation ability and magnetic properties of the high entropy alloy.When the doping amount of Mn is 10at%and 15at%,the coercivity is relatively low,measuring less than 2 A/m.

关 键 词：高熵非晶软磁合金 非晶形成能力 软磁性能 成分调控 

分 类 号：TG139.8[一般工业技术—材料科学与工程]