Calibration and characterisation with a new laser-based magnetostriction measurement system

被引：5
|
作者：
Rafferty, A. [1 ]
Bakir, S. [1 ]
Brabazon, D. [1 ]
Prescott, T. [1 ]
机构：
[1] Dublin City Univ, Sch Mech & Mfg Engn, Dublin 9, Ireland
来源：
MATERIALS & DESIGN | 2009年 / 30卷 / 05期
关键词：
Magnetostriction; Magnetic field strength; Terfenol-D; Cobalt ferrite; COMPOSITES; FERRITE;
D O I：
10.1016/j.matdes.2008.07.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A laser-based magnet measurement system has been developed to measure the magnetostrictive strain of large cylindrical samples. The measurement system incorporates a solenoid capable of generating a maximum magnetic field intensity of 3000 Oe and a laser displacement sensor. For calibration and evaluation purposes, the positive magnetostrictions of two different types of giant magnetostrictive Tb-Dy-Fe-based materials were accessed with this system. A magnetostrictive strain of 622 ppm was obtained at 3000 Oe for TbxDy1-xFe2-y, compared with 725 ppm for Tb0.27DY0.73Fe2. A rod of sintered cobalt ferrite was also measured. This exhibited negative magnetostriction, with a maximum contraction of 260 ppm at 3000 Oe. (c) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1680 / 1684
页数：5
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