Soft magnetic polymer-metal composites consisting of nanostructural Fe-basic powders

• Autorzy: Nowosielski R.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The paper presents and reviews the research results of soft magnetic composites consisting nanocrystalline powders obtained by soaking and high energetic milling of amorphous ribbons of metallic glasses Fe78Si9B13 and Fe73.5Cu1Nb3Si13.5B9. Design/methodology/approach: Amorphous Fe78Si9B13 and Fe73.5Cu1Nb3Si13.5B9 ribbons were milled in a high energy ball mill (8000 SPEX CertiPrep Mixer/Mill) with a ball-to-sample weight ratio of 5:1. The obtained metallic powders were sieved to a particle mean diameter 200-500 micrometres, 75-200 micrometres and 25-75 micrometres, and then annealed in an argon atmosphere to generate the nanocrystalline state. The powders particles were mixed and consolidated with polymer to obtain composites in the form toroidal cores. Observations of the structure of powders and composites were made on the Opton DSM-940 scanning electron microscope and electron transmitting microscope JEOL JEM 200CX and X-ray analysis. The X-ray tests were realized with the use of the XRD 7 SEIFERT-FPM diffractometer. Findings: The analysis of the magnetic properties test results of the powders obtained in the high-energy ball of milling process, and the composites manufactured from these powders proved that the process causes significant decrease in the magnetic properties in relation to ribbons. The structure and magnetic properties of this material may be improved by means of a proper choice of parameters of this process as well as the final thermal treatment and first of all by decrease of demagnetization effect. Research limitations/implications: For the powders, further magnetic, structure and composition examinations are planed. Practical implications: The amorphous and nanocrystalline Fe78Si9B13 and Fe73.5Cu1Nb3Si13.5B9 powders obtained by high-energy ball milling of metallic glasses feature an alternative to solid alloys and make it possible to obtain the ferromagnetic nanocomposites, whose shape, dimensions and magnetic properties can be freely formed in the determinate range. Originality/value: The paper presents influence of chemical composition of selected Fe-based metallic glasses, annealing temperature and parameters of the high-energy ball milling process on structure and magnetic properties of soft magnetic powders materials obtained in this technique. This paper review also possibility of magnetic properties forming for metal-polymer nanocrystalline composites. Results and a discussion of the influence of high energy mechanical milling process on particle size and their distribution and annealing temperature of powders as well as structure and magnetic properties of investigated samples is presented. According to achieved results it has been attempted to describe the possibilities of improvement the soft magnetic properties of obtained Fe-based nanocrystalline powder materials and composites from them manufactured.

Słowa kluczowe

EN

nanomaterials; powders; heat treatment; magnetic properties; magnetic composites

PL

nanomateriały; proszki; obróbka cieplna; właściwości magnetyczne; kompozyty magnetyczne

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 24, nr 1
• Strony: 68--77
• Opis fizyczny: Bibliogr. 25 poz., fot., rys.

Twórcy

autor

Nowosielski R.

• Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18 a, 44-100 Gliwice, Poland,

Bibliografia

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