Magnetostrictive SmFe2/metal composites
Magnetostrictive SmFe2/metal composites
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DOI：
10.1063/1.118930
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发表时间：
1997-05
影响因子：
4
通讯作者：
F. Pinkerton;T. W. Capehart;J. Herbst;E. G. Brewer;C. Murphy
中科院分区：
文献类型：
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作者：
F. Pinkerton;T. W. Capehart;J. Herbst;E. G. Brewer;C. Murphy
我们制备了一种新型的磁致伸缩复合材料，它是由SmFe2镶嵌在铁基或铝基中形成的，具有高的磁致伸缩和良好的机械强度。体积分数为50%SmFe2/50%Fe或Al的热压复合材料在610C(Fe)或540°C(Al)下凝固时，磁致伸缩应变平行于外加磁场λ∥，在−280ppm至−440ppm之间。这项工作的一个独特特点是通过熔体旋压生产磁致伸缩的SmFe2组分；含Al的带状复合材料结合了显著的磁矫顽力(Hci=3Koe)和高磁致伸缩(λ∥=−280ppm)。与脆性的SmFe2母材不同，这种复合材料很容易加工。
We have fabricated novel magnetostrictive composites consisting of SmFe2 embedded in an Fe or Al matrix which feature high magnetostriction and good mechanical strength. Hot pressed composites of 50% SmFe2/50% Fe or Al by volume have magnetostrictive strains parallel to the applied magnetic field, λ∥, between −280 and −440 ppm when consolidated at 610 (Fe) or 540 °C (Al). One unique feature of this work is the production of the magnetostrictive SmFe2 component by melt spinning; ribbon-based composites with Al combine significant magnetic coercivity, Hci=3 kOe, with high magnetostriction (λ∥=−280 ppm). Unlike their brittle SmFe2 parent materials, the composites are easily machinable.