Low core losses and magnetic properties of Fe85-86Si1-2B8P4Cu1 nanocrystalline alloys with high B for power applications (invited)
Low core losses and magnetic properties of Fe85-86Si1-2B8P4Cu1 nanocrystalline alloys with high B for power applications (invited)
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DOI：
10.1063/1.3535169
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发表时间：
2011-04-01
影响因子：
3.2
通讯作者：
Yoshida, Shigeyoshi
中科院分区：
文献类型：
--
作者：
Makino, Akihiro;Kubota, Takeshi;Yoshida, Shigeyoshi
近来，能源危机和发电量的持续增长强烈要求最小化浪费的能量耗散。磁芯损耗（W）是电机和变压器中能量耗散的主要来源。这就要求开发具有低矫顽力（H-c）和高磁通密度（B）的软磁材料。富铁Fe_（85 - 86）Si_（1 - 2）B_（88）P_（44）Cu_（1）（at.由工业原料（含少量杂质）制成的宽为6 mm的合金薄带具有含有大量极小Fe晶粒（小于3 nm）的异质非晶结构，这是适量P和Cu添加的独特作用的结果。这些合金通过退火的结晶显示α-Fe的均匀沉淀，导致α-Fe晶粒的均匀纳米晶化结构，尺寸为16-19 nm，伴随着宽度约1 nm的晶间非晶层。宽的薄带显示出1.82-1.85 T（在800 A/m下）的高B，几乎与商业取向的Fe-3质量% Si合金相当。优异的磁性柔软度（低H-c为2.6-5.8 A/m，在1 kHz下具有2.4-2.7 × 10（4）高磁导率和沿着具有2.3-2.4 × 10（-6）的小饱和磁致伸缩，具有高电阻率（0.67-0.74 μ Ω m）的这些合金导致磁芯损耗的上级频率特性和在50 Hz下低得多的W直到1.75 T的最大感应，与目前实际用于电力应用的硅钢相比。(C)2011年美国物理学会。[doi：10.1063/1.3535169]
Recently, the energy crisis and the continued growth in electrical power generation strongly demand minimization of wasteful energy dissipation. Magnetic core loss (W) is the main source of energy dissipation in motors and transformers. This requires the development of soft magnetic materials with low coercivity (H-c) and high magnetic flux density (B). Fe-rich Fe85-86Si1-2B8P4Cu1 (at. %) alloy ribbons made from industrial raw materials (containing some impurities) with 6 mm in width have a heteroamorphous structure containing a large number of extremely small Fe grains (less than 3 nm), resulting from the unique effects of P and Cu addition in proper amounts. Crystallization of these alloys by annealing shows a uniform precipitation of alpha-Fe, leading to a uniform nanocrystallized structure of alpha-Fe grains, 16-19 nm in size, accompanied by an intergranular amorphous layer about 1 nm in width. The wide ribbons exhibit high B of 1.82-1.85 T (at 800 A/m), almost comparable to commercial oriented Fe-3 mass% Si alloys. Excellent magnetic softness (low H-c of 2.6-5.8 A/m, high permeability of 2.4-2.7 x 10(4) at 1 kHz and small saturation magnetostriction of 2.3-2.4 x 10(-6)) along with high electrical resistivity (0.67-0.74 mu Omega m) of these alloys result in superior frequency characteristics of core losses and a much lower W at 50 Hz up to the maximum induction of 1.75 T, in comparison to the silicon steels now in practical use for power applications. (C) 2011 American Institute of Physics. [doi:10.1063/1.3535169]