Highly Ductile and Ultra-Thick P-Doped FeSiB Amorphous Alloys with Excellent Soft Magnetic Properties.

Zongzhen Li,Guangqiang Zhang,Wei Zheng,Shaoxiong Zhou

doi:10.3390/ma11071148

Abstract

Herein, we demonstrate the successful synthesis of novel Fe80Si9B(11−x)Px (x = 0, 1, 3, 5, 7) ultra-thick amorphous ribbons by planar flow casting. The influence of P alloying on glass forming ability (GFA), microstructure, thermal stability, soft magnetic properties, and ductility has been systematically investigated. The results reveal that introduction of P into Fe80Si9B11 alloy can remarkably enhance the GFA and increase critical thickness (tc) of the alloy from 45 to 89 um. Furthermore, the annealed FeSiBP amorphous alloys exhibited excellent soft magnetic properties, including high saturation magnetic flux density of 1.54 T, the low coercivity of 1.5 A/m, and low core losses of 0.15 W/kg. In addition, the representative Fe80Si9B8P3 ultra-thick amorphous alloy demonstrate excellent ductility even after annealing at 400 °C for 10 min, which indicates the superior performance of P-doped FeSiB alloys as compared to the commercial Fe78Si9B13 (Metglas 2605 S2) alloy. The combination of high GFA, excellent ductility, and low core losses of newly developed FeSiBP amorphous soft magnetic alloys makes them attractive candidates for magnetic applications in the high-frequency and high-speed electric devices.

Highlights

With the development of science and technology, much effort has been devoted to making devices faster, lighter, and more energy efficient, which would make life easier or be more environmentally friendly [1,2,3,4,5]
It has been demonstrated that the replacement of conventional magnetic cores by amorphous soft magnetic cores in distribution transformers, used in electricity networks, can reduce no-load losses by more than 80% [9,10]
Despite the fact that silicon steel is the most commonly used soft magnetic material for motors, high power conversion, and distribution transformers, it exhibits a large amount of core losses at high-frequency for advanced high-speed devices

Summary

Introduction

With the development of science and technology, much effort has been devoted to making devices faster, lighter, and more energy efficient, which would make life easier or be more environmentally friendly [1,2,3,4,5]. The energy efficiency of various power electronic devices, such as transformers [5], electric vehicle [6], high-frequency, and advanced high-speed motors [7], could be significantly improved by using newly developed amorphous magnetic cores. Novel soft magnetic materials have been applied in many fields, such as energy storage, energy conversion, filtering, power generation, and sensing. It has been demonstrated that the replacement of conventional magnetic cores by amorphous soft magnetic cores in distribution transformers, used in electricity networks, can reduce no-load losses by more than 80% [9,10]. Despite the fact that silicon steel is the most commonly used soft magnetic material for motors, high power conversion, and distribution transformers, it exhibits a large amount of core losses at high-frequency for advanced high-speed devices.

Methods

Results

Conclusion