Soft magnetic Fe-Si-B-Cu nanocrystalline alloys with high Cu concentrations

Soft magnetic Fe-Si-B-Cu nanocrystalline alloys with high Cu concentrations
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高浓度 Cu 软磁 Fe-Si-B-Cu 纳米晶合金

DOI:
10.1016/j.jallcom.2017.06.128
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发表时间:
2017-10
影响因子:
6.2
通讯作者:
Zhang W.
Zhang W.
中科院分区:
材料科学2区
文献类型:
--
作者:
Li Y. H.;Jia X. J.;Xu Y. Q.;Chang C. T.;Xie G. Q.;Zhang W.

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在高Cu含量的简单Fe-Si-B-Cu合金系中,制备了工艺性好的高饱和磁通密度(Bs)纳米晶软磁合金。对含1.7- 2.0at%Cu的快淬Fe-Si-B-Cu合金进行退火处理,得到了高超导转变温度为1.77T,低矫顽力为1.71A/m的纳米晶合金。高Cu含量有利于在非晶基体中形成平均晶粒尺寸约为1.6 nm的高数密度α-Fe核心,即使在低升温速率退火下,也能通过竞争生长抑制α-Fe晶粒的过度生长,从而获得细小的纳米结构和优异的软磁性能。
High saturation magnetic flux density (Bs) soft magnetic nanocrystalline alloys with good manufacturability were developed in a simple Fe-Si-B-Cu alloy system with high Cu concentrations. The nanocrystalline alloys with highBsof ∼1.77 T and low coercivity of ∼7.1 A/m were obtained by annealing the melt-spun Fe-Si-B-Cu alloys containing 1.7–2.0 at% Cu. The high content of Cu facilitates the formation of high-number-density α-Fe nuclei with an average grain size of ∼6 nm pre-existing in the amorphous matrix, which inhibits the excessive growth of the α-Fe grains by their competitive growth even during the low-heating-rate annealing, resulting in a fine nanostructure and excellent soft magnetic properties.
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