A comparison of soft magnetic composites designed from different ferromagnetic powders and phenolic resins

doi:10.1016/j.cjche.2014.12.005

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (4): 736-743.DOI: 10.1016/j.cjche.2014.12.005

A comparison of soft magnetic composites designed from different ferromagnetic powders and phenolic resins

Magdalena Streckova¹, Radovan Bures¹, Maria Faberova¹, Lubomir Medvecky¹, Jan Fuzer², Peter Kollar²

1 Institute of Materials Research, Slovak Academy of Sciences,Watsonova 4704353 Košice, Slovak Republic;
2 Institute of Physics, Faculty of Science P. J. Šafárik University, Park Angelinum 904001, Košice, Slovak Republic

收稿日期:2013-11-22 修回日期:2014-07-28 出版日期:2015-04-28 发布日期:2015-05-13
通讯作者: Magdalena Streckova
基金资助:
Supported by the Slovak Research and Development Agency under the contracts (APVV- 0222-10),the Operational Program “Research and Development” financed through European Regional Development Fund (ITMS 26220220105),and the Scientific Grant Agency of the Ministry of Education of Slovak Republic and the Slovak Academy of Sciences,projects (VEGA 1/0861/12,VEGA 1/0862/12,VEGA VEGA 2/0155/12).

A comparison of soft magnetic composites designed from different ferromagnetic powders and phenolic resins

Magdalena Streckova¹, Radovan Bures¹, Maria Faberova¹, Lubomir Medvecky¹, Jan Fuzer², Peter Kollar²

1 Institute of Materials Research, Slovak Academy of Sciences,Watsonova 4704353 Košice, Slovak Republic;
2 Institute of Physics, Faculty of Science P. J. Šafárik University, Park Angelinum 904001, Košice, Slovak Republic

Received:2013-11-22 Revised:2014-07-28 Online:2015-04-28 Published:2015-05-13
Contact: Magdalena Streckova
Supported by:
Supported by the Slovak Research and Development Agency under the contracts (APVV- 0222-10),the Operational Program “Research and Development” financed through European Regional Development Fund (ITMS 26220220105),and the Scientific Grant Agency of the Ministry of Education of Slovak Republic and the Slovak Academy of Sciences,projects (VEGA 1/0861/12,VEGA 1/0862/12,VEGA VEGA 2/0155/12).

摘要/Abstract

摘要： Soft magnetic composites (SMCs) were prepared from three different ferromagnetic powder particles: iron powder ASC 100.29, spherical FeSi particles and vitroperm (Fe₇₃Cu₁Nb₃Si₁₆B₇) flakes. Two types of hybrid organic-inorganic phenolic resins modified with either silica nanoparticles or boron were used to design a thin insulating layer perfectly covering the ferromagnetic particles. Fourier transform infrared (FTIR) spectrometry confirmed an incorporation of silica or boron into the polymer matrix, which manifested itself through an improved thermal stability of the hybrid resins verified by thermogravimetric-differential scanning calorimetry (TG-DSC) analysis. The core-shell particles prepared from the ferromagnetic powder particles and themodified hybrid resins were further compacted to the cylindrical and toroidal shapes for the mechanical, electrical and magnetic testing. A uniform distribution of the resin between the ferromagnetic particles was evidenced by scanning electron microscope (SEM) analysis, which was also reflected in a rather high value of the electrical resistivity. A low porosity and extraordinary high values of mechanical hardness and flexural strength were found in SMC consisting of the iron powder and phenolic resinmodified with boron. The coercive fields of the prepared samples were comparable with the commercial SMCs.

关键词: Composite materials, Core-shell particles, Fourier transform infrared (FTIR) spectroscopy, Powder metallurgy, Sol-gel method

Abstract: Soft magnetic composites (SMCs) were prepared from three different ferromagnetic powder particles: iron powder ASC 100.29, spherical FeSi particles and vitroperm (Fe₇₃Cu₁Nb₃Si₁₆B₇) flakes. Two types of hybrid organic-inorganic phenolic resins modified with either silica nanoparticles or boron were used to design a thin insulating layer perfectly covering the ferromagnetic particles. Fourier transform infrared (FTIR) spectrometry confirmed an incorporation of silica or boron into the polymer matrix, which manifested itself through an improved thermal stability of the hybrid resins verified by thermogravimetric-differential scanning calorimetry (TG-DSC) analysis. The core-shell particles prepared from the ferromagnetic powder particles and themodified hybrid resins were further compacted to the cylindrical and toroidal shapes for the mechanical, electrical and magnetic testing. A uniform distribution of the resin between the ferromagnetic particles was evidenced by scanning electron microscope (SEM) analysis, which was also reflected in a rather high value of the electrical resistivity. A low porosity and extraordinary high values of mechanical hardness and flexural strength were found in SMC consisting of the iron powder and phenolic resinmodified with boron. The coercive fields of the prepared samples were comparable with the commercial SMCs.

Key words: Composite materials, Core-shell particles, Fourier transform infrared (FTIR) spectroscopy, Powder metallurgy, Sol-gel method

Magdalena Streckova, Radovan Bures, Maria Faberova, Lubomir Medvecky, Jan Fuzer, Peter Kollar. A comparison of soft magnetic composites designed from different ferromagnetic powders and phenolic resins[J]. Chinese Journal of Chemical Engineering, 2015, 23(4): 736-743.

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A comparison of soft magnetic composites designed from different ferromagnetic powders and phenolic resins

A comparison of soft magnetic composites designed from different ferromagnetic powders and phenolic resins

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