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Intelligent epoxy matrix composite materials consisting of Tb0.3Dy0.7Fe1.9 magnetostrictive particulates

Dobrzański L., Wydrzyńska A., Iesenchuk O.

Archives of Materials Science and Engineering

2009

Vol. 35, nr 1

33-38

Purpose: This paper presents the acceptable technology to fabricate epoxy-bonded Tb0.3Dy0.7Fe1.9 composites in an effort to produce Tb0.3Dy0.7Fe1.9 bulks with good magnetostrictive properties through the optimization of some fabrication parameters. Design/methodology/approach: Intelligent polymer matrix composite materials consisting of magnetostrictive particulates was obtained by homogenously mixing low viscosity epoxy resin and Tb0.3Dy0.7Fe1.9 powder with grains from 38 to 106 μm. The relationships among the manufacturing technology of these materials, their microstructure, as well as their magnetostriction were evaluated. Materialographic examination of powders morphology and the structure of composite materials were also made. Findings: Composite materials consisting of Tb0.3Dy0.7Fe1.9 particles can extend the possibilities of application the magnetostrictive materials and reduce the cost of their manufacturing. The obtained materials show regular distribution of Tb0.3Dy0.7Fe1.9 powder in epoxy matrix. Research limitations/implications: The advantages of the bonded magnetostrictive composite materials are their simple technology, possibility of forming their properties and lowering manufacturing costs. It is expected that the magnetostrictive properties of Tb0.3Dy0.7Fe1.9 composites presented in this work can be further improved by amelioratethe fabrication parameters. Originality/value: Manufacturing processes of intelligent epoxy matrix composite materials consisting of Tb0.3Dy0.7Fe1.9 magnetostrictive particulates.

Corrosion resistance of composite materials Fe73.5Cu1Nb3Si13.5B9 - PE type in acid environment

Ziębowicz B., Dobrzański L., Drak M., Wydrzyńska A.

Archives of Materials Science and Engineering

2008

Vol. 30, nr 2

89-92

Purpose: The purpose of the paper is to present corrosion resistance of composite materials Fe73.5Cu1Nb3Si13.5B9 – PEHD type in acid environment. Design/methodology/approach: Composite materials Fe73.5Cu1Nb3Si13.5B9 – PEHD type were manufactured by one-sided uniaxal pressing. Composite materials were placed in a corrosive environment and two tests were carried out as specified below: test at the temperature of 25oC, solution of 0.1 M chloride acid HCl, time of 348h, test at the temperature of 25oC, solution of 0.1 M sulfuric (VI) acid H2SO4, time of 348h. Findings: The main purpose of obtaining this kind of composite materials is broadening possibilities of nanocrystalline magnetic materials application that influence on the miniaturization, simplification and lowering the costs of devices. Practical implications: The manufacturing of composite materials Fe73.5Cu1Nb3Si13.5B9 – PEHD type greatly expand the applicable possibilities of nanocrystalline powders of magnetically soft materials however further examination to obtain improved properties of magnetic composite materials and investigations of constructions of new machines and devices with these materials elements are still needed. Originality/value: Results allow to complete data concerning composite materials nanocrystalline powder – polymer type which are an attractive alternative for traditional materials with specific magnetic properties.