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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Magnetic behaviour of nanocrystalline Cu-Fe-Co/Al_2O_3 composite powders obtained by mechanical alloying
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Magnetic behaviour of nanocrystalline Cu-Fe-Co/Al_2O_3 composite powders obtained by mechanical alloying

机译：机械合金化制备纳米晶Cu-Fe-Co / Al_2O_3复合粉的磁行为

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摘要

The effects of Al_2O_3 addition on structural and magnetic property changes during mechanical alloying of Cu, Fe and Co element powders were studied systematically by X-ray diffraction, superconducting quantum interference device (SQUID) and magnetic force microscopy (MFM). Milling the powders for up to 10 h leads to the progressive diffusion of Co and Fe atoms into the Cu. Face-centered cubic Cu(Fe.Co) phases with coherent diffraction domains (cdd) size of ~35 nm were prepared by mechanically alloying Cu_(0.5)Fe_(0.25)Co_(0.25) with and without Al_2O_3 powder (1%, 3% and 10%). The effect of crystal size on magnetic properties was studied. Mechanically alloyed metallic-ceramic composite powder showed lower saturation magnetization than the metallic system but enhanced coercive field. Milling time significantly affects the structure, composition, magnetic properties, and magnetic domains for both metallic and composite systems.
机译：通过X射线衍射，超导量子干涉仪（SQUID）和磁力显微镜（MFM），系统地研究了Al_2O_3的添加对Cu，Fe和Co元素粉末机械合金化过程中结构和磁性能变化的影响。将粉末研磨长达10小时会导致Co和Fe原子逐渐扩散到Cu中。通过将含或不含Al_2O_3粉末（1％，3）的Cu_（0.5）Fe_（0.25）Co_（0.25）机械合金化来制备相干衍射域（cdd）尺寸约为35nm的面心立方Cu（Fe.Co）相％和10％）。研究了晶体尺寸对磁性的影响。机械合金化的金属陶瓷复合粉末的饱和磁化强度比金属体系低，但矫顽场增强。铣削时间会显着影响金属和复合材料系统的结构，组成，磁性能以及磁畴。

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