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首页> 外文期刊>Порошковая Металлургия >STRUCTURAL AND MAGNETIC PROPERTIES OF Fe_(60-x)Ni_x(ZnO)_(40) NANOCOMPOSITES PRODUCED BY MECHANICAL MILLING AND COATED BY THERMAL SPRAYING ON A STEEL SUBSTRATE
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STRUCTURAL AND MAGNETIC PROPERTIES OF Fe_(60-x)Ni_x(ZnO)_(40) NANOCOMPOSITES PRODUCED BY MECHANICAL MILLING AND COATED BY THERMAL SPRAYING ON A STEEL SUBSTRATE

机译:Fe_(60-x)Ni_x(ZnO)_(ZnO)_(40)纳米复合材料的结构和磁性,通过机械研磨产生并通过钢基材上的热喷涂涂覆

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摘要

This work aims to study the effect of mechanical milling of Fe, ZnO, and Ni elemental powders and thermal spraying processes on chemical composition, structural properties, and magnetic behavior of the Fe_(60-x)Ni_x(ZnO)_(40) coatings. As the first step, the FeNi/ZnO composite was synthesized by mechanical alloying process, and afterward, the milled powder was coated by a thermal spraying technique on a steel substrate. Obtained samples were characterized by the methods of X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), atomic force microscopy (AFM), and with help of vibrating sample magnetometer (VSM). After mechanical milling, the crystallite size of the powder decreased from 18 to 10 nm, while the lattice strain increased from 0.31 to 0.59%, and a new solid solution FeNi formed after 20 h of milling due to diffusion of nickel into the iron lattice. After the thermal spraying process, different phases appeared in a surface coating such as ZnFe_2O_4, NiFe_2O_4, and FeNi. The magnetic and structural properties of the coated powders are influenced by the change in chemical composition. Thus, the increase of Ni concentration improved the soft magnetic performance of the coating significantly. The highest saturation magnetization was determined in Fe_(40)Ni_(20)(ZnO)_(40) sprayed powder. However, the smallest coercivity appeared in Fe_(50)Ni_(10)(ZnO)_(40) sprayed powder.
机译:这项工作旨在研究Fe,ZnO和Ni元素粉末机械研磨和热喷涂工艺对Fe_(60-x)Ni_x(ZnO)_(40)涂层的化学成分,结构性和磁性行为的影响。作为第一步,通过机械合金化工艺合成FENI / ZnO复合材料,然后通过钢基板上的热喷涂技术涂覆碾磨粉末。通过X射线衍射(XRD),扫描电子显微镜(SEM),能量分散光谱(EDS),原子力显微镜(AFM),以及振动样品磁力计(VSM)的帮助。获得获得的样品。机械研磨后,粉末的微晶尺寸从18至10nm降低,而晶格菌株从0.31升增加到0.59%,并且由于镍扩散到铁晶格中,20小时后形成的新的固体溶液Feni。在热喷涂过程之后,在表面涂层中出现不同的相位,例如ZnFe_2O_4,NiFe_2O_4和FENI。涂覆粉末的磁性和结构性能受化学成分变化的影响。因此,Ni浓度的增加显着提高了涂层的软磁性能。在Fe_(40)Ni_(20)(ZnO)_(40)喷涂的粉末中测定最高饱和磁化强度。然而,最小的矫顽力出现在Fe_(50)Ni_(10)(ZnO)_(40)喷涂粉末中。

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