The Fe–6.5 wt.%Si/SiO 2 core–shell composite powders and compacts have been prepared by simple ball milling coating and spark plasma sintering process. The microstructure, magnetic and electrical properties of the compact samples obtained at different sintering temperatures were investigated by differential scanning calorimetry, X …
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Fe3O4/ZrO2 composites were prepared by high-energy ball milling. The principle of coating of magnetic composite particles was deeply investigated. The bonding strength of Fe3O4/ZrO2 magnetic composite particles can be predicted by combining deduced maximum overlap amount of the ZrO2 nanoparticle and Fe3O4 particle and …
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Fundamental study on the mechanical strength of soft magnetic composite prepared by ultra-high aspect ratio flake iron powder using ball-milling process Koki Ohba a …
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ABSTRACT. Fe-based nanocrystalline alloy powder prepared by ball-milling is a potential candidate as a soft magnetic composite (SMC). Since the magnetic …
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FeNi/SrFe12O19 (FeNi/SrM) composites were prepared by ball milling using atomized FeNi powder and SrM in a certain proportion. The effects of SrM content on microwave absorption properties and magnetism were studied. The SEM results showed that the SrM was broken into fine crumb-like and granular by ball milling, which adhered …
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SrFe 12 O 19 /CoFe 2 O 4 nanostructured magnetic composites were fabricated by ball milling. • Magnetic interactions are strongly influenced by the frequency of milling. • Competition between exchange coupling and dipolar interactions are observed. • 20 % increasement of (BH) max is achieved for certain conditions of manufacturing.
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Soft magnetic composite materials comprised of alumina coated iron powders were produced via high-energy ball milling. "Self-coating" occurs directly from milling media, no additional powder necessary. Low ball-to-powder ratios permit minimal particle size reduction while continuing to deform powders.
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In this study, a novel magnetic poly (tetrafluoroethylene, PTFE) (Fe@PTFE) piezoelectric catalytic material was successfully prepared by a simple ball milling …
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In the present work, nanocrystalline binary Fe60Al40 (wt.%) powders have been synthesized by a high-energy planetary ball mill under an inert argon atmosphere. …
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In this paper, Fe soft magnetic composites (SMCs) coated with MnO 2 were prepared successfully by ball milling and following spark plasma sintering. The effect of MnO 2 content on microstructure and magnetic properties for the Fe/MnO 2 SMCs was investigated in detail. The analysis results show that a uniform MnO 2 coating layer …
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When the ball milling time reaches 24 h, the Fe-Si SMCs exhibits superior magnetic properties such as high Ms (181.0 emu/g), very low core loss (361.5 kW/m³ at 100 kHz) and good frequency ...
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Carbon nanotubes (CNTs) reinforced FeCo alloys were produced by high energy ball-milling and spark plasma sintering (SPS). CNTs distribution in the FeCo alloy was gradually improved as ball-milling time increased, with a uniform dispersion achieved after 6 h ball-milling.Tensile tests demonstrated that, as the ball-milling time increased, …
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The ball milling process was performed in a high-energy ball mill (8000 SPEX CertiPrep Mixer/Mill) with a ball-to-sample weight ratio of 5:1. The milling process reduced the starting material pieces (metallic glasses) to powder form. ... Examination of powders and composite cores magnetic properties ...
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The evolution of the magnetic properties of composite Al 2 O 3 /Co(P) particles during ball milling and dynamic compaction is investigated. To prepare starting …
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Capacitance dispersion versus frequency at different applied magnetic fields, of the composite 0.7BaTiO 3 –0.3CoFe 2 O 4 ... BaTiO 3 –xCoFe 2 O 4 was achieved via thermally assisted high-energy ball milling. All composites exhibited a ferrimagnetic behavior and dielectric properties that resemble the parent barium titanate and cobalt ...
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To deal with the growing electromagnetic hazards, herein a Co@CuFe 2 O 4 absorbing agent with excellent impedance matching at thin thickness was obtained via an innovative route of ball-milling assisted chemical precipitation and annealing. The as-prepared composite possesses excellent interface polarization ability due to sufficient …
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In this work, an iron-based soft magnetic composite coated with a composite layer of sodium silicate and nano ferroferric oxide was prepared by two-step ball milling. The presence of sodium silicate reduces the eddy current loss which increases the resistivity and makes the distribution of Fe 3 O 4 on the surface more uniform.
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The evolution of the magnetic properties of composite Al 2 O 3 /Co(P) particles during ball milling and dynamic compaction is investigated. To prepare starting composite particles, the Al 2 O 3 granules were coated with a Co 95 P 5 shell by electroless plating. The magnetic and structural properties of the composite particles …
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Another work analyze the ball milling effect and the microstructure on a composite alloy of Eurofer97 steel reinforced 3 wt.% of NbC. Likewise, it was tested the effect of high energy ball milling on the morphology, microstructure, and properties of TiC particle-reinforced 6005A aluminum alloy matrix composite with 1.5, 3, and 6 wt.% .
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After ball milling for 15 min, 0.5 g of nano ferroferric oxide was added. The reduced iron powder and additives were placed in a ball mill ... This soft magnetic …
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After high-energy ball milling, lots of interfaces, boundaries and defects will be generated in the composite particle. These will also aid to enhancing ε r and μ r. Thus, Fe/Fe 2–3 N composites were prepared by adopting high-energy ball milling method. The microstructure of the composites is nanostructure. The magnetic property and ...
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Magnetic Composite by Two-Stage Ball Milling Guodong Zhang, Jiaqi Chen, and Yao Liuz Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong ... After ball milling for 15min, 0.5g of nano ferroferric oxide was added. The reduced iron powder and additives were placed in a ball mill ...
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SrFe12O19/CoFe2O4 magnetic composites were fabricated by mixer ball milling technique (with the oscillating frequency of 10, 15, 20 and 25 Hz) using hexagonal ferrite (80 wt.%) and cubic ferrite ...
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The effects of different ball milling time on the particle shape of FeNi alloy and the electromagnetic parameters and microwave absorbing properties of the material at 0 ~ 18GHz were studied. The ...
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Ball-milled Fe-Si-Al soft magnetic powder cores with the particle compositions away from the classical Sendust point were prepared in this work. The influences of alloy composition on the metallographic structure, density, hardness, and resistivity of Fe-Si-Al alloy, as well as the frequency-dependent permeability, loss, and …
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In the present work, Al 2 O 3-10 wt% Fe composite powders were manufactured by mechanical alloy using different milling times.The morphology, structure and magnetic properties were carefully investigated and explained through the results of SEM, XRD (with Rietveld refinement), Möss spectroscopy and magnetic …
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Then grinding jars are placed symmetrically in the planetary ball mill, and the mZVAl/nFe 3 O 4 composite is prepared at different BM speeds and BM time settings without inert gas protection. After BM, the mZVAl/nFe 3 O 4 samples were collected by magnetic effect, and stored in a plastic-envelop bag before use. 2.3.
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Another work analyze the ball milling effect and the microstructure on a composite alloy of Eurofer97 steel reinforced 3 wt.% of NbC. Likewise, it was tested the …
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ZnFe 2 O 4 /graphite composites were synthesized by a high temperature ball milling method. Magnetic properties, electromagnetic response, and microwave absorption properties of the ZnFe 2 O 4 /graphite composites with different graphite were investigated by a vibrating sample magnetometer and a vector network analyzer in the …
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A high-energy planetary ball mill was used to perform the MA process. Tungsten carbide balls and blended powders with a ball to powder ratio of 10:1 were placed into stainless steel vials filled with Argon gas. During MA, a rotational speed of 300 rpm was adopted while cyclohexane (C 6 H 12) was used as the PCA and C source.
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