| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 102 === Magnetostrictive materials have potential applications to MEMS and other sensing devices, because of their capabilities to convert magnetic energy into mechanical energy, and vice versa. This study focuses on a series of Fe81-XNiXGa19(X =0、4、11、17、22、26) bulk. We examined the bulk components by SEM-EDS. Structural property was investigated by X-ray diffraction (XRD) and magnetic property by vibration sample magnetometer (VSM). Magnetostriction were studied by using strain gauges. Mechanical properties were using by Resonant Frequency &; Damping Analyser (RFDA) at Magnetic field measured.
After analyzing via the above-listed instrument, the Fe81-XNiXGa19(X=0,4,11,17,22,26) bulks grow with the <110>&;<220> texture. About resistivity, samples with composition X=4 have larger resistivity. About magnetization, the measured saturation magnetization decrease with increases in Ni for Fe81-xNixGa19 alloys. As to the magnetostrictive part, the magnetostriction value has been decrease when the Nickel increases. In the mechanical properties part, the Young's modulus and shear modulus increases with the magnetic field becomes larger, the comparative hardness found in 0% Ni and 26% Ni has pretty good mechanical properties.
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