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首页> 外文期刊>Materials Science and Engineering >Structure And Magnetic Properties Of Nanostructured Ni_(0.77)fe_(0.16)cu_(0.05)cr_(0.02) (mumetal) Powders Prepared By Mechanical Alloying
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Structure And Magnetic Properties Of Nanostructured Ni_(0.77)fe_(0.16)cu_(0.05)cr_(0.02) (mumetal) Powders Prepared By Mechanical Alloying

机译：机械合金化制备的纳米结构Ni_（0.77）fe_（0.16）cu_（0.05）cr_（0.02）（金属金属）粉末的结构和磁性

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摘要

Ni-Fe based alloy powders are interesting materials for their application as soft magnetic material with low coercivity and high permeability. In this study, nanocrystalline Ni_(0.77)Fe_(0.16)Cu_(0.05)Cr_(0.02) (Mumetal) alloy powders were synthesized by mechanical alloying process using planetary high-energy ball mill under argon atmosphere. The alloy formation and different physical properties were studied as a function of milling time (h), ranging from 0h to 96h, using X-ray diffraction (XRD) technique, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and the vibrating sample magnetometer (VSM). The complete phase formation of γ-(Fe, Ni, Cu, Cr) is observed after 12 h milling time. Powder morphology at different stages was examined by SEM and different particle shape was observed. Saturation magnetization and coercivity derived from the hysteresis curves are discussed as a function of milling time and showed that saturation magnetization increases and coercivity decreases with milling time. Increase in milling time, led to reduction in crystallite size and increase in lattice parameter , thus inducing a higher magnetization and lower coercitivity.
机译：Ni-Fe基合金粉末是有趣的材料，因为它们用作具有低矫顽力和高磁导率的软磁性材料。本研究利用氩气行星高能球磨机通过机械合金化工艺合成了纳米晶Ni_（0.77）Fe_（0.16）Cu_（0.05）Cr_（0.02）（Mumetal）合金粉末。使用X射线衍射（XRD）技术，扫描电子显微镜（SEM），能量色散X射线光谱（EDS）研究了合金形成和不同的物理性能与铣削时间（h）在0h至96h之间的函数关系）和振动样品磁力计（VSM）。研磨12小时后，观察到γ-（Fe，Ni，Cu，Cr）的完全相形成。通过SEM检查不同阶段的粉末形态，观察到不同的颗粒形状。讨论了从磁滞曲线得出的饱和磁化强度和矫顽力与铣削时间的关系，结果表明，随着铣削时间的增加，饱和磁化强度和矫顽力降低。研磨时间的增加，导致晶粒尺寸减小，晶格参数增大，从而导致较高的磁化强度和较低的矫顽力。

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