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Optimisation the magnetic properties of the (Fe1-xCox)73.5Cu1Nb3Si13.5B9(X=10;30;40) alloys

Szwieczek D., Raszka T., Olszewski J.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 20, nr 1-2

31-36

EN

Purpose: In this paper results of experience of influence a structure (amorphous and amorphous after structural relaxation) on the magnetic properties (the initial magnetic permeability mu p, the magnetic permeability mu in function magnetic field H, the coercive field Hc, the remanence Br and the saturation induction Bs) on (Fe1-xCox)73.5Cu1Nb3Si13.5B9(X=10;30;40) alloys have been presented. Design/methodology/approach: The material was obtained by the method of rapid cooling from liquid phase. The measurements of structure were made on the magnetic balance, the X-ray diffraction and the moessbauer measurements. The measurements of the magnetic properties were made on the Maxwell-Wien bridge, the fluxometr and the VSM - Vibrating Sample Magnetometer. Findings: The results allowed defining that are significant dependence between the magnetic properties and the structure of the material. Research limitations/implications: Due to the high influence of the cobalt on the magnetic properties of the material further research should be undertaken. Practical implications: The measurements of allows give information to the industry how affect on the magnetic properties of alloys by adequate the heat treatment. Originality/value: The Finemet is very attractive due to his excellent the soft magnetic properties. The problem of his application in higher temperature of application and improvement his magnetic properties have been presented.

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Structure and magnetic properties of Fe63.5Co10Cu1Nb3Si13.5B9 alloy

Szewieczek D., Raszka T.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 18, nr 1-2

179--182

EN

Purpose: In this paper results of experience of influence a structure (amorphous, amorphous after structural relaxation and nanocrystal) and influence a corrosion medium, which was 1 M solution NaCl, on magnetic properties (initial magnetic permeability μp, relative magnetic permeability μw, coercive field Hc, remanence Br and saturation magnetisation Bs) on Fe63.5Co10Cu1Nb3Si13.5B9 alloy have been presented. Design/methodology/approach: The material was obtained by the method of rapid cooling from liquid phase. The measurements of structure were made on the magnetic balance, the X-ray diffraction. The measurements of magnetic properties were made on the Maxwell-Wien bridge, the fluxometr and the VSM – Vibrating Sample Magnetometer. Findings: The results allowed defining that are significant dependence between the magnetic properties, the structure of the material and the corrosion. Research limitations/implications: Due to the high influence of the corrosion on the magnetic properties of the material further research should be undertaken. Practical implications: The measurements allow giving information to the industry how decrease the magnetic properties of alloy after influence the corrosion medium. Originality/value: The Finemet is very attractive due to his excellent soft magnetic properties. The problem of the corrosion has been presented and her influence on the magnetic properties.

3

Manufacturing technology of the composite materials: nanocrystalline material - polymer type

Ziębowicz B., Szewieczek D., Dobrzański L. A.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 14, nr 1-2

37--42

EN

Purpose: This paper presents the material and technological solution which makes it possible to obtain the nanocrystalline, ferromagnetic powder material of Fe73.5Cu1Nb3Si13.5B9 alloy after its thermal nanocrystallization with the succeeding high-energy milling. Another aspect was to develop the technology to obtain the nanocrystalline composite materials made by binding the obtained powder material with the high density low pressures polyethylene (PEHD) with the controlled ferromagnetic and mechanical properties. Design/methodology/approach: Magnetic properties of composite materials were examined on the Lake Shore Cryotronics Inc VSM vibratory magnetometer. Compression strength of composite materials was determined on Instron 1195 universal testing machine. Findings: The research carried out has made it possible to develop the general technological process that makes it possible to fabricate composite materials consisting of the nanocrystalline powders of the soft magnetic material and thermoplastic polymer with the required magnetic and mechanical properties. Examination of mechanical properties show that these materials have satisfactory compression strength. Composite materials show lower magnetic properties in comparison with magnetic powder but their geometrical form allows to extend their applications. Practical implications: The usability of composite materials nanocrystalline material – polymer type as inductive component in electronic industry depends upon further investigations. Originality/value: Soft magnetic composite materials based on Fe73.5Cu1Nb3Si13.5B9 alloy powders are essential elements in today’s electronic world. As far as we know, composites materials based on nanocrystalline material as soft magnetic materials have not been examined yet.

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Influence of Na2SO4 on magnetic properties of (Fe1-XCoX)73.5Cu1Nb3Si13.5B9 (X=10, 40) alloys

Szewieczek D., Raszka T.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 17, nr 1-2

161--164

EN

Purpose: In this paper magnetic properties of new (Fe1-XCoX)73.5Cu1Nb3Si13.5B9 (X=10, 40) alloys have been presented. Moreover comparison of the changes of their magnetic properties due to influence of corrosion medium Na2SO4 has been done. Design/methodology/approach: The material was obtained by the method of rapid cooling from liquid phase. The measurements of magnetic properties were made on the Maxwell-Wien bridge, the fluxometr and the VSM – Vibrating Sample Magnetometer. Findings: The results allowed defining that are significant dependence between the magnetic properties and the corrosion. Research limitations/implications: Due to the high influence the corrosion on the magnetic properties of the material further research should be undertaken. Practical implications: The measurements allow giving information to the industry how decrease the magnetic properties of alloy after influence the corrosion medium. Originality/value: The Finemet is very attractive due to his excellent soft magnetic properties. The problem of the corrosion has been presented and her influence on the magnetic properties.

5

Własności magnetyczne nanokrystalicznego materiału typu Finemet

Kolano-Burian A., Kolano R., Szynowski J., Wójcik N., Winczura L.

Archiwum Nauki o Materiałach

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2003

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T. 24, nr 1

79-93

PL

Przedstawiono wyniki badań dotyczących sposobu wytwarzania stopu Finemet (Fe73,5Cu1Nb3Si13,5B9) oraz kształtowania jego struktury i wynikających z niej znakomitych właściwości magnetycznie miękkich. Na uwagę zasługują wyniki badań wpływu prędkości chłodzenia po obróbce cieplnej taśmy (MS) na strukturę i przenikalność magnetyczną stopu oraz badania wpływu pola magnetycznego działającego w czasie obróbki cieplnej na strukturę domenową i kształt pętli histerezy. Ponadto zamieszczono wyniki badań wpływu częstotliwości pola magnesującego na zmiany niektórych parametrów magnetycznych (Bm, Ps, Hc, Br).

EN

Results of a research work related to preparation of the Finemet-type Fe73,5Cu1Nb3Si13,5B9 alloy and formation of its structure resulting in excellent soft magnetic properties have been presented. Particularly interesting are results of a study of an effect of the cooling rate for a ribbon after heat treatment on the structure and magnetic permeability of the alloy, and of a study of the influence of the magnetic field present during heat treatment on the domain structure and shape of the hysteresis loop. Moreover, results of the investigation on magnetizing field frequency dependence of the main magnetic parameters, i.e. Bm, Ps, Hc and Br, have been presented.