Potential of powder metallurgical methods to fabricate Fe-6.5Si soft magnetic components

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-04-18 DOI:10.1177/00325899241247319

I. Lindemann-Geipel, T. Mix, M. Thamm, C. Höhnel, B. Weise, K. Reuter, A. Kirchner, T. Weißgärber

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引用次数: 0

Abstract

The soft magnetic Fe-6.5Si alloy is well known for its excellent soft magnetic properties but its usage is limited due to fabricational constrains by conventional methods. Powder metallurgical processing of Fe-6.5Si is possible by a variety of different methods shown here, sinter-based screen printing (SP), electron beam powder bed fusion (E-PBF) and field-assisted sintering (field-assisted sintering/spark plasma sintering, FAST/SPS). The microstructure of the components varies strongly by process and powder used which is directly influencing their soft magnetic properties. The correlation between powder properties and processing parameters on the structural and magnetic properties is established. Lowest coercivity ( H c = 7 A m−1) is achieved by E-PBF due to large grain size minimising hysteresis losses necessary for direct current applications. SP can provide sheets with low coercivity ( H c = 21 A m−1) and adjustable thickness reducing eddy current losses especially suitable for alternating current application at higher frequencies. FAST/SPS can be used for a large range of powder particle sizes which is suitable to tune the soft magnetic properties in a wide range between 40 and 210 A m−1.

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粉末冶金法制造 Fe-6.5Si 软磁元件的潜力

软磁 Fe-6.5Si 合金以其卓越的软磁特性而闻名，但由于传统制造方法的限制，其使用受到了限制。铁-6.5Si的粉末冶金加工有多种不同方法，如烧结式丝网印刷（SP）、电子束粉末床熔融（E-PBF）和现场辅助烧结（现场辅助烧结/火花等离子烧结，FAST/SPS）。元件的微观结构因工艺和所用粉末的不同而有很大差异，这直接影响了它们的软磁特性。粉末特性和加工参数对结构和磁性能的影响是相互关联的。由于晶粒尺寸大，直流应用所需的磁滞损耗最小，E-PBF 可实现最低矫顽力（H c = 7 A m-1）。SP 可提供低矫顽力（H c = 21 A m-1）的薄片，厚度可调，减少了涡流损耗，特别适合高频交流电应用。FAST/SPS 可用于较大范围的粉末粒度，适合在 40 到 210 A m-1 的宽范围内调整软磁特性。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.