High-frequency MnZn soft magnetic ferrite by engineering grain boundaries with multiple-ion doping

2021 ◽  
Vol 79 ◽  
pp. 165-170
Author(s):  
Mi Yan ◽  
Shengbo Yi ◽  
Xiuyuan Fan ◽  
Zhenghua Zhang ◽  
Jiaying Jin ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
High Frequency ◽  
Soft Magnetic ◽  
Ion Doping

scholarly journals A study on the Microstructures and the Suppression of Grain Growth in Rapidly Solidified Fe-Si-B(-Cu-Zr-Ca) Base Nanostructured Alloys

2020 ◽  
Vol 58 (9) ◽  
pp. 633-638
Author(s):  
Hyun Ah Im ◽  
Jun Young Jeong ◽  
Su Bong An ◽  
Keun Young Sohn ◽  
Won-Wook Park
Keyword(s):  
Grain Boundaries ◽  
Grain Growth ◽  
High Frequency ◽  
Eddy Currents ◽  
Soft Magnetic Materials ◽  
Wireless Power ◽  
Soft Magnetic ◽  
Amorphous Ribbons ◽  
Heat Treated ◽  
Rapidly Solidified

Magnetic induction and resonance wireless power charging generally operates in a high frequency range, and its efficiency is degraded by the generation of heat at high frequency. This makes it necessary to develop new soft magnetic materials capable of maintaining their characteristics even at high frequency. The purpose of this study is to minimize the heat generated by the eddy currents when charging, and to improve the charging efficiency under an alternating magnetic field. In this study, Fe-Si-B alloys containing Cu, Zr and Ca elements were melt-spun to prepare amorphous ribbons. The amorphous ribbons were heat treated to crystallize nanograins, The structure was analyzed by TEM and EELS, As a result, it was found that Zr was distributed mainly at the grain boundaries after heat treatment, whereas Ca was uniformly distributed only along the grain boundaries. It could be concluded that the Ca and Zr elements effectively suppressed the grain growth, and thus maintained the very fine nanograin structure.

EBSD Analysis of Friction Stir Welded 7136-T76 Aluminum Alloy

2013 ◽  
Vol 203-204 ◽  
pp. 258-261 ◽  
Author(s):  
Izabela Kalemba ◽  
Krzysztof Muszka ◽  
Mirosław Wróbel ◽  
Stanislaw Dymek ◽  
Carter Hamilton
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Grain Boundaries ◽  
Texture Analysis ◽  
Crystallographic Texture ◽  
High Frequency ◽  
The Other ◽  
Ebsd Analysis ◽  
High Angle ◽  
Friction Stir

This research addresses the EBSD analysis of friction stir welded 7136-T76 aluminum alloy. The objectives of this study were to evaluate the grain size and their shape, character of grain boundaries in the stirred and thermo-mechanically affected zones, both on the advancing and retreating side as well as to investigate changes in the crystallographic texture. Results of texture analysis indicate the complexity of the FSW process. The texture gradually weakens on moving from the thermo-mechanically affected zone toward the weld center. The stirred zone is characterized by very weak texture and is dominated by high angle boundaries. On the other hand, the thermo-mechanically affected zone exhibits a high frequency of low angle boundaries.

scholarly journals Marked Enhancement of Roll-Off Frequency in FeCoN Synthetic Antiferromagnetic Films Deposited by Oblique Incidence

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2328
Author(s):  
Luran Zhang ◽  
Dandan Gao ◽  
Huan Liu ◽  
Jiyang Xie ◽  
Wanbiao Hu
Keyword(s):  
High Frequency ◽  
Oblique Incidence ◽  
Magnetic Thin Films ◽  
Soft Magnetic ◽  
High Frequency Region ◽  
Glass Substrates ◽  
Marked Enhancement ◽  
Oblique Deposition ◽  
Potential Applications ◽  
Sputtering System

A series of FeCoN films were successfully deposited on glass substrates in a magnetron sputtering system. Using oblique incidence method and FeCoN/Ru/FeCoN synthetic antiferromagnetic (SAF) structure, two additional anisotropies energy were introduced: oblique incidence anisotropy and exchange anisotropy energy, which marked enhancement of the effective magnetic anisotropy (Hk). The increment of Hk results in a significant improvement in the roll-off frequency of these films. The roll-off frequency of FeCoN/Ru/FeCoN films with SAF structure can reach up to 8.6 GHz. A feasible approach to conveniently controlling Hk of soft magnetic thin films by using oblique deposition and SAF structure can further improve their properties for the potential applications in the high frequency region.

High-frequency soft magnetic properties of Finemet modified with Co

2007 ◽  
Vol 316 (2) ◽  
pp. e820-e822 ◽  
Author(s):  
A. Kolano-Burian ◽  
L.K. Varga ◽  
R. Kolano ◽  
T. Kulik ◽  
J. Szynowski
Keyword(s):  
Magnetic Properties ◽  
High Frequency ◽  
Soft Magnetic Properties ◽  
Soft Magnetic

High-Frequency soft magnetic properties of Fe-Si-B-P-Mo-Cu amorphous and nanocrystalline alloys

2019 ◽  
Vol 526 ◽  
pp. 119702 ◽  
Author(s):  
E.N. Zanaeva ◽  
A.I. Bazlov ◽  
D.A. Milkova ◽  
A.Yu. Churyumov ◽  
A. Inoue ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
High Frequency ◽  
Nanocrystalline Alloys ◽  
Soft Magnetic Properties ◽  
Soft Magnetic
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