Properties of the magnetostrictive composite materials with the polyurethane matrix reinforced with Terfenol-D particles

• Autorzy: Dobrzański L. A. , Tomiczek A. E. , Pacyna A. W.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this work is to obtain functional composite materials and to observe changes of magnetic properties of samples with different particle size distributions of magnetostrictive Terfenol-D (Tb_0.3Dy_0.7Fe_1.9) powder. The influence of the concentration and particles size of the Tb_0.3Dy_0.7Fe_1.9 on magnetic properties were investigated as function of applied magnetic field intensity, temperature and frequency. Design/methodology/approach: The investigated samples were obtained by casting of the composite materials with the polyurethane matrix reinforced with Tb_0.3Dy_0.7Fe_1.9 particles. Magnetizations versus applied field curves were registered using the Oxford Instruments Ltd. vibrating sample magnetometer (VSM). Volume magnetic susceptibility was determined as temperature function on the Cahn RG automatic electrobalance (Ventron Instrumens, USA). Testing of the magnetic permeability in function of frequency was made using the Maxwell-Wien bridge system and the electrical properties were made by the resistivity measurements. Findings: Analysis establishes a direct connection between physical properties and structural characteristics of the Tb_0.3Dy_0.7Fe_1.9 powder size: the increases of particle size distribution of Tb_0.3Dy_0.7Fe_1.9 powder in composite materials amplify the magnetic responses and - at the same time - causing growth of resistivity values also. Moreover, in the investigated frequency range, no effect was observed of frequency on the susceptibility value for the particular material, which suggests possibility of using these materials in the high-frequency magnetic fields. Practical implications: The polyurethane matrix in investigated composite materials causes growth of resistivity, limiting these way losses for eddy currents at the high operating frequency of the transducers. Originality/value: The obtained results show the possibility of manufacturing the magnetostrictive composite materials based on the Tb_0.3Dy_0.7Fe_1.9 particles, with desired physical properties (including electrical one) in cost effective way in comparison to conventional giant magnetostrictive materials (GMM).

Słowa kluczowe

EN

magnetostriction; Terfenol-D; giant magnetostrictive materials; composite materials

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 55, nr 2
• Strony: 316--322
• Opis fizyczny: Bibliogr. 25 poz., rys., tab.

Twórcy

autor

Dobrzański L. A.

• Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Tomiczek A. E.

• Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Pacyna A. W.

• Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, Poland

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