Structural and magnetic characterization of composite YCo5/alpha-Fe (20 wt%) powders prepared by mechanical alloying and subsequent annealing

Ll JLS; Hernando B; Perez MJ; Santos JD

首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Structural and magnetic characterization of composite YCo5/alpha-Fe (20 wt%) powders prepared by mechanical alloying and subsequent annealing

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Structural and magnetic characterization of composite YCo5/alpha-Fe (20 wt%) powders prepared by mechanical alloying and subsequent annealing

机译：机械合金化和随后退火制备的复合YCo5 /α-Fe（20 wt％）粉末的结构和磁性表征

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Powder mixtures of YCo5 + alpha-Fe (20 wt%) were prepared by high energy mechanical alloying under Ar using a SPEX 8000 mill and subsequent vacuum annealing. The structural and magnetic properties were investigated by X-ray diffraction, DSC, and magnetic measurements. After 4 h of milling, the alloyed powders were found to be composed of an amorphous Y-Co phase and alpha-Fe with a mean grain size strongly reduced. The DSC curves exhibited an irreversible broad exothermic peak with a maximum at 555 degrees C associated with the crystallization process. Subsequent high vacuum annealing in the temperature range 550-750 degrees C led to the formation of rhombohedral Th2Zn17-type and alpha-Fe(Co) phases. Samples were magnetically soft showing low remanence and room temperature coercivity in the range 470-800 Oe. The latter is in agreement with the low magnetocrystalline anisotropy along the basal plane exhibited by the Y-2(Co, Fe)(17) phase. (c) 2007 Elsevier B.V. All rights reserved.

机译：使用SPEX 8000轧机在氩气下通过高能机械合金化并随后进行真空退火，制备了YCo5 +α-Fe（20 wt％）的粉末混合物。通过X射线衍射，DSC和磁测量研究了结构和磁性。研磨4小时后，发现合金粉末由无定形的Y-Co相和α-Fe组成，平均晶粒度大大降低。 DSC曲线显示出不可逆的宽放热峰，在555℃下具有与结晶过程相关的最大值。随后在550-750摄氏度的温度范围内进行高真空退火导致形成菱面体Th2Zn17型和α-Fe（Co）相。样品是软磁的，在470-800 Oe的范围内显示出较低的剩磁和室温矫顽力。后者与Y-2（Co，Fe）（17）相沿基平面的低磁晶各向异性一致。（c）2007 Elsevier B.V.保留所有权利。

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《Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites》 |2007年第10期|共4页
作者
Ll JLS; Hernando B; Perez MJ; Santos JD;
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正文语种 eng
中图分类晶体学;
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mechanical alloying; magnetic properties; nanoparticles; 2-PHASE MAGNETS;

机译：机械合金化;磁性;纳米粒子;2-相磁体;

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1. Structural and magnetic characterization of composite YCo5/alpha-Fe (20 wt%) powders prepared by mechanical alloying and subsequent annealing [J] . Ll JLS, Hernando B, Perez MJ, Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites . 2007,第8a10期

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Structural and magnetic characterization of composite YCo5/alpha-Fe (20 wt%) powders prepared by mechanical alloying and subsequent annealing

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