Fe-P Soft Magnetic Properties of Iron for A.C. Applications

Silicon steels and ferrites dominate soft magnetic materials. However, Soft magnetic materials using powder metallurgical techniques are gaining wide spread use in motor, compressors and other rotating devices. High-density Fe-P soft magnetic materials have been developed using hot powder forging route. It was observed that phosphorous addition (ranging from 0.30P-0.80P) enhances the soft magnetic properties of iron for AC applications. This new soft magnetic material offers many manufacturing advantages. Because of its low eddy current loss, it has good high frequency magnetic properties comparable to other soft magnetic materials. Also, it has been observed that phosphorous addition improves the final density of the resulting product.

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Loss Separation Model: A Tool for Improvement of Soft Magnetic Materials

Materials Science Forum ◽

10.4028/www.scientific.net/msf.869.596 ◽

2016 ◽

Vol 869 ◽

pp. 596-601 ◽

Cited By ~ 1

Author(s):

Marcos Flavio de Campos

Keyword(s):

Magnetic Material ◽

Magnetic Materials ◽

High Frequency ◽

Eddy Currents ◽

Soft Magnetic Materials ◽

Barkhausen Noise ◽

Magnetic Barkhausen Noise ◽

Soft Magnetic ◽

Physical Reasoning ◽

Separation Model

Loss separation has fundamental importance for optimizing the magnetic material for a given frequency of operation. The loss separation model assumes the existence of two main terms: one due to the hysteresis at the quasi-static situation with frequency less than 0.01 Hz and another dynamic, due to high frequency eddy currents. In this study, it is discussed the physical reasoning behind the loss separation model. Magnetic Barkhausen Noise can be a valuable tool for better understanding the physics of loss separation.

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Electromagnetic design of a 3D tester for magnetic properties of soft magnetic materials

ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501) ◽

10.1109/icems.2001.970695 ◽

2002 ◽

Author(s):

Jin Jiang Zhong ◽

Jian Guo Zhu

Keyword(s):

Magnetic Properties ◽

Magnetic Materials ◽

Soft Magnetic Materials ◽

Soft Magnetic ◽

Electromagnetic Design

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The AC Soft Magnetic Properties of FeCoNixCuAl (1.0 ≤ x ≤ 1.75) High-Entropy Alloys

Materials ◽

10.3390/ma12244222 ◽

2019 ◽

Vol 12 (24) ◽

pp. 4222 ◽

Cited By ~ 2

Author(s):

Zhongyuan Wu ◽

Chenxu Wang ◽

Yin Zhang ◽

Xiaomeng Feng ◽

Yong Gu ◽

...

Keyword(s):

Magnetic Properties ◽

Soft Magnetic Materials ◽

Magnetic Flux Density ◽

High Entropy Alloys ◽

Soft Magnetic Properties ◽

Phase Content ◽

Soft Magnetic ◽

High Entropy ◽

Two Phases ◽

Fcc Phase

High-entropy alloys (HEAs) with soft magnetic properties are one of the new candidate soft magnetic materials which are usually used under an alternating current (AC) magnetic field. In this work, the AC soft magnetic properties are investigated for FeCoNixCuAl (1.0 ≤ x ≤ 1.75) HEAs. The X-ray diffraction (XRD) and scanning electron microscope (SEM) show that the alloy consists of two phases, namely a face-centred cubic (FCC) phase and a body-centred cubic (BCC) phase. With increasing Ni content, the FCC phase content increased. Further research shows that the AC soft magnetic properties of these alloys are closely related to their phase constitution. Increasing the FCC phase content contributes to a decrease in the values of AC remanence (AC Br), AC coercivity (AC Hc) and AC total loss (Ps), while it is harmful to the AC maximum magnetic flux density (AC Bm). Ps can be divided into two parts: AC hysteresis loss (Ph) and eddy current loss (Pe). With increasing frequency f, the ratio of Ph/Ps decreases for all samples. When f ≤ 150 Hz, Ph/Ps > 70%, which means that Ph mainly contributes to Ps. When f ≥ 800 Hz, Ph/Ps < 40% (except for the x = 1.0 sample), which means that Pe mainly contributes to Ps. At the same frequency, the ratio of Ph/Ps decreases gradually with increasing FCC phase content. The values of Pe and Ph are mainly related to the electrical resistivity (ρ) and the AC Hc, respectively. This provides a direction to reduce Ps.

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