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Research on Fe(100-x)Gax Alloy Applied to Magnetostrictive Displacement Sensors

Xin Zhi Zhou, Chao Yu, Yin Xiong, Qian Ning

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Abstract

The saturation magnetostriction (λs) for Fe-Ni alloy can only reach 30ppm, leading the magnetostrictive displacement sensor based on the alloy not to be used in the large displacement measurement. Therefore, applying Fe(100-x)Gax alloy, of which maximum λs can reach 400 ppm to giant magnetostrictive displacement sensor is presented. The crystal magnetostrictive model is shown at first; and then the magnetostriction in [100] and [111] directions have the decided advantage over Fe-Ni alloy and Ni alloy is given; besides, the characteristics of high permeability, low coercivity and low hysteresis loss for Fe(100-x)Gax are shown; moreover, the signal of the magnetostrictive displacement sensors made from Fe(100-x)Gax is analyzed. Finally, it is proved that Fe(100-x)Gax (17≤x≤19) is practicable for extending measure range of MDS.

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What this paper is about

The saturation magnetostriction (λs) for Fe-Ni alloy can only reach 30ppm, leading the magnetostrictive displacement sensor based on the alloy not to be used in the large displacement measurement. Therefore, applying Fe(100-x)Gax alloy, of which maximum λs can reach 400 ppm to giant magnetostrictive displacement sensor is presented. The crystal magnetostrictive model is shown at first; and then the magnetostriction in [100] and [111] directions have the decided advantage over Fe-Ni alloy and Ni alloy is given; besides, the characteristics of high permeability, low coercivity and low hysteresis loss for Fe(100-x)Gax are shown; moreover, the signal of the magnetostrictive displacement sensors made from Fe(100-x)Gax is analyzed. Finally, it is proved that Fe(100-x)Gax (17≤x≤19) is practicable for extending measure range of MDS.

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Available abstract

The saturation magnetostriction (λs) for Fe-Ni alloy can only reach 30ppm, leading the magnetostrictive displacement sensor based on the alloy not to be used in the large displacement measurement. Therefore, applying Fe(100-x)Gax alloy, of which maximum λs can reach 400 ppm to giant magnetostrictive displacement sensor is presented. The crystal magnetostrictive model is shown at first; and then the magnetostriction in [100] and [111] directions have the decided advantage over Fe-Ni alloy and Ni alloy is given; besides, the characteristics of high permeability, low coercivity and low hysteresis loss for Fe(100-x)Gax are shown; moreover, the signal of the magnetostrictive displacement sensors made from Fe(100-x)Gax is analyzed. Finally, it is proved that Fe(100-x)Gax (17≤x≤19) is practicable for extending measure range of MDS.

Key concepts: Magnetostriction, Materials science, Alloy, Displacement (psychology), Saturation (graph theory), Coercivity, Hysteresis, Metallurgy

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