Core Losses and Soft Magnetic Properties of Nanocrystalline Fe-Zr-Nb-B Alloys with Zero-Magnetostriction

2000 ◽  
Vol 644 ◽  
Author(s):  
Akihiro Makino ◽  
Akihisa Inoue ◽  
Tuyoshi Masumoto
Keyword(s):  
Magnetic Properties ◽  
Core Loss ◽  
Quaternary Alloy ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Quaternary Alloys ◽  
Surface Layers ◽  
The Core ◽  
Crystalline Surface ◽  
Core Losses

AbstractThe structure, the soft magnetic properties and the core losses for Fe-Zr-Nb-B(-Cu) nanocrystalline alloys were investigated. It has been already reported that the typical ternary nanocrystalline Fe90Zr7B3 and Fe84Nb7B9 alloys exhibit good soft magnetic properties and a small negative and a small positive magnetostriction (λs), respectively. The soft magnetic properties of the nanocrystalline Fe84–90(Zr, Nb)7B3–9 quaternary alloys with mixed compositions of Fe90Zr7B3 and Fe84Nb7B9 cannot be improved whereas very small magnetostrictions are obtained. The quaternary alloys with 7 at% (Zr + Nb) have structures of an amorphous with α-Fe phases on the free and roll-contacted surfaces at an as-quenched state. The crystalline surface layers deteriorate the soft magnetic properties at a crystallized state. The high saturation magnetic induction of 1.64 T, the high permeability of 60,000 at 1 kHz and the very low core loss of 0.9 W/kg at 1.4 T and 50 Hz are obtained for the Fe85.5(Zr1/3Nb2/3)6B8.5 alloy containing 6 at% of (Zr + Nb) content with nearly zero-λs produced by crystallizing the single amorphous phase without the crystalline surface layers. The thermal stability of the core loss of the quaternary alloy is significantly higher than that of the Fe78Si9B13 amorphous alloy. The crystalline surface layers of the Fe84–90(Zr, Nb)7B3–9 quaternary alloys disappear by 1 at% Cu addition, which results in significant improvement of the soft magnetic properties at a crystallized state.

Enhanced Electrical Resistivity and Soft Magnetic Properties in Ca-Doped Fe-B-Cu Alloy Ribbons

2016 ◽  
Vol 873 ◽  
pp. 23-27
Author(s):  
Zhi Gang Zheng ◽  
J.S. Zhang ◽  
H.Y. Yu ◽  
B. Li ◽  
D.C. Zeng ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Electrical Resistivity ◽  
Applied Magnetic Field ◽  
Melt Spinning ◽  
Core Loss ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
The Core ◽  
Cu Alloy

Fe83.5B15Cu1.5Cax (x= 0.04, 0.07, 0.1 and 0.13) alloy ribbons were fabricated by melt spinning. The effects of Ca addition on electrical resistivity and soft magnetic properties were investigated. The results show that with increasing Ca content from 0.04 to 0.13 the electrical resistivity monotonously increases from 0.51 μΩ·m to 0.99 μΩ·m while the core loss reduced by 39% and 28% at 10 kHz and 20kHz under an applied magnetic field of 200 mT, respectively. After annealing at 420°C for 10min, sample with x=0.13 obtains the peak saturation induction density (Bs) of 1.82 T and coercive force (Hc) of 18 A/m. Especially, the core loss of sample x=0.13 decreased by 13% and 34% than that of x= 0.04 at 200 kHz under an applied magnetic field of 25 mT and 50 mT respectively. Therefore, the soft magnetic properties and core loss can be tuned by addition of Ca in Fe-B-Cu alloy ribbons.

Low core losses and soft magnetic properties of Fe–Al–Ga–P–C–B–Si glassy alloy ribbons with large thicknesses

1999 ◽  
Vol 85 (8) ◽  
pp. 4418-4420 ◽  
Author(s):  
Takao Mizushima ◽  
Akihiro Makino ◽  
Shoji Yoshida ◽  
Akihisa Inoue
Keyword(s):  
Magnetic Properties ◽  
Glassy Alloy ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Core Losses

Influence of Heat Treatment Processing on the Magnetic Properties of Fe-3.5Si Soft Magnetic Composites in Material Application

2012 ◽  
Vol 578 ◽  
pp. 206-210
Author(s):  
Yuan Dong Peng ◽  
Zhi Yue Sun ◽  
Jun Wu Nie ◽  
Wen Jun Zhang ◽  
Zeng Guang Mao ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Core Loss ◽  
Treatment Temperature ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
The Core ◽  
Soft Magnetic Composite ◽  
Eddy Loss

In this paper, the effect of heat treatment processing on magnetic properties of Fe-3.5Si soft magnetic composite has been investigated. The thermal treatment improved the magnetic properties of Fe-3.5Si SMC materials. With the treatment temperature increasing, the permeability and eddy loss of the composites increase and the core loss and hysteresis loss decrease. The magnetic properties would be deteriorated at too high temperature. Annealed temperature at 750°C for 60min, the Fe-3.5Si soft magnetic composite has the optimum overall magnetic properties.

scholarly journals Enhanced Soft Magnetic Properties of Iron-Based Powder Cores with Co-Existence of Fe3O4–MnZnFe2O4 Nanoparticles

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 702 ◽  
Author(s):  
Yuye Xie ◽  
Pengfei Yan ◽  
Biao Yan
Keyword(s):  
Magnetic Properties ◽  
Core Loss ◽  
Magnetic Composite ◽  
Powder Metallurgy Method ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Soft Magnetic Composite ◽  
Insulation Coating ◽  
Iron Based ◽  
Microstructure And Magnetic Properties

An iron-based soft magnetic composite with Fe3O4-MnZnFe2O4 insulation coating has been prepared by powder metallurgy method. This work investigated the microstructure and magnetic properties of Fe/Fe3O4-MnZnFe2O4 powder cores. Scanning electron microscopy (SEM) coupled with an energy dispersive spectrometry (EDS) analysis indicated that the Fe3O4 and MnZnFe2O4 nanoparticles were uniformly coated on the surface of Fe powders. The co-existence of Fe3O4 and MnZnFe2O4 contributes to the preferable distribution of nano-sized insulation powders and excellent soft magnetic properties of soft magnetic composite (SMC) with high saturation magnetization Ms (215 A·m2/kg), low core loss (178.7 W/kg measured at 100 kHz, 50 mT), and high effective amplitude permeability of 114 (measured at 100 kHz). Overall, this work has great potential for realizing low core loss and outstanding soft magnetic properties of Fe-based powder cores.

Microstructure and Soft Magnetic Properties of Fe61Co10Y8Me1B20 (Where Me = W, Zr or Nb) Amorphous Alloys

2012 ◽  
Vol 57 (1) ◽  
pp. 265-270 ◽  
Author(s):  
P. Pietrusiewicz ◽  
M. Nabiałek ◽  
M. Szota ◽  
K. Perduta
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Melt Spinning ◽  
Magnetic Measurements ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Entire Volume ◽  
Magnetic Cores ◽  
Amorphous Nature ◽  
Core Losses

Microstructure and Soft Magnetic Properties of Fe61Co10Y8Me1B20(Where Me = W, Zr or Nb) Amorphous AlloysThe microstructure and the soft magnetic properties of the multi-component Fe61Co10Y8Me1B20amorphous alloys (where Me = W, Zr or Nb) have been investigated; the samples were in the form of ribbons of 3 mm width and 30 μm thickness. The samples were produced using a single-roller melt-spinning method. The alloy composition was investigated using an X-ray diffractometer. The amorphous nature of the entire volume of all the as-quenched samples was confirmed. From the magnetic measurements performed using the ‘LakeShore’ vibrating sample magnetometer, magnetic parameters such as: coercivity, saturation of the magnetization for the as-quenched samples were derived. All of the investigated alloys displayed good soft magnetic properties, making them perfect materials for magnetic cores. The core losses for different values of magnetic field and operating frequency were also measured. It was shown that the investigated alloys featured lower core losses than commercially-used classical FeSi steel.

Soft Magnetic Properties and Structure of Nanocrystalline Alloys Based on Finemet

1999 ◽  
Vol 577 ◽  
Author(s):  
I. Todd ◽  
H.A. Davies ◽  
M.R.J. Gibbs ◽  
D. Kendall ◽  
R.V. Major
Keyword(s):  
Magnetic Properties ◽  
Material Properties ◽  
Core Loss ◽  
Nanocrystalline Alloys ◽  
Partial Substitution ◽  
Soft Magnetic Properties ◽  
Residual Glass ◽  
Saturation Magnetostriction ◽  
Soft Magnetic ◽  
Nano Composite

ABSTRACTThe effects of partial substitution of Al for Fe in Fe73.5-xAlxSi13B9Nb3Cu1, nano composite alloys both on the a.c. magnetic properties such as permeability and core loss, saturation magnetostriction and core loss are presented. The observed improvements in material properties are discussed in relation to the nanocrystallite and residual glass component chemistry.

Soft Magnetic Properties of Fe-Ti-N Alloy Thin Films

1998 ◽  
Vol 22 (4_1) ◽  
pp. 186-189
Author(s):  
M. Matsumoto ◽  
A. Morisako ◽  
Y. Mutoh
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Soft Magnetic Properties ◽  
Soft Magnetic

Investigation of the Structure and Magnetic Properties of Bulk Amorphous FeCoYB Alloy

2017 ◽  
Vol 68 (9) ◽  
pp. 2162-2165 ◽  
Author(s):  
Katarzyna Bloch ◽  
Mihail Aurel Titu ◽  
Andrei Victor Sandu
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Hyperfine Field ◽  
Irreversible Processes ◽  
Magnetization Process ◽  
Casting Method ◽  
The Core ◽  
Injection Casting ◽  
Core Losses ◽  
Microstructural Studies

The paper presents the results of structural and microstructural studies for the bulk Fe65Co10Y5B20 and Fe63Co10Y7B20 alloys. All the rods obtained by the injection casting method were fully amorphous. It was found on the basis of analysis of distribution of hyperfine field induction that the samples of Fe65Co10Y5B20 alloy are characterised with greater atomic packing density. Addition of Y to the bulk amorphous Fe65Co10Y5B20 alloy leads to the decrease of the average induction of hyperfine field value. In a strong magnetic field (i.e. greater than 0.4HC), during the magnetization process of the alloys, where irreversible processes take place, the core losses associated with magnetization and de-magnetization were investigated.

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