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应力退火对Fe_73．5Cu₁Nb₃Si_13．5B₉纳米晶合金磁性能的影响

Effect of stress annealing on magnetic properties for nanocrystalline Fe_73.5Cu₁Nb₃Si_13.5B₉ alloy

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【Author】 ZHI Qizheng~1 CHEN Wenzhi~2 LIU Jingya~(1,2) HE Kaiyuan~1 1.School of Materials and Metallurgy,Northeastern University,Shenyang 110004 2.National Amorphous and Nanocrystalline Alloy Engineering Research Center,Central Iron and Steel Research Institute,Beijing 100081

【机构】东北大学材料与冶金学院；钢铁研究总院国家非晶微晶合金工程技术研究中心；东北大学材料与冶金学院沈阳 110004；北京 100081；沈阳110004 钢铁研究总院国家非晶微晶合金工程技术研究中心北京100081；沈阳 110004；

【摘要】采用一种新的退火方式,将 Fe_73．5Cu₁Nb₃Si_13．5B₉合金薄带在铜环上卷绕成铁芯,研究在这种方式的退火过程中 Fe_73．5Cu₁Nb₃Si_13．5B₉合金薄带晶化时产生的张应力对其磁性的影响．结果表明：与普通退火相比,这种张应力使退火后合金的剩磁 Br 明显下降（最低为0．22T）,形成的感生磁各向异性的易轴垂直于张应力的方向．这种横向感生磁各向异性起因于纳米 bcc Fe（Si）晶粒内通过内应力和负的磁滞伸缩引起的磁弹性作用．更多还原

【Abstract】 Applying a new annealing method,in which Fe_73.5Cu₁Nb₃Si_13.5B₉ nanocrystalline ribbon was wound into toroidal core on a copper ring,influence of uniform tensile stress generated in crystallization process on magnetism of Fe_73.5Cu₁Nb₃Si_13.5B₉ nanocrystalline ribbon was investigated.It is found that the remanence B_r after the stress annealing is obviously lower than that after normal annealing and the minimum value is 0.22 T.The induced magnetic anisotropy with an easy axis perpendicular to the tensile stress direction develops.The origin of transversal stress-induced magnetic anisotropy can be explained by a magneto-elastic interaction within nanosized bcc Fe（Si） grains through internal stress and negative magnetostriction.更多还原