کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
749773 | 894848 | 2008 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Micro-magnetostrictive vibrator using iron–gallium alloy Micro-magnetostrictive vibrator using iron–gallium alloy](/preview/png/749773.png)
A micro-magnetostrictive vibrator using an iron–gallium alloy (Galfenol) drive element was investigated. Galfenol is an iron-based magnetostrictive material with magnetostrictions greater than 200 ppm, a high relative permeability μr > 70 and a Young’s modulus of ∼70 GPa. This material is machinable by conventional cutting techniques, and can operate under tensile, bending, and impact loads without degradation in performance. A micro-actuator using Galfenol, therefore, has advantages over a PZT type actuator in design simplicity, low drive voltage requirements, high robustness, and a wide temperature operating range. This paper describes the design, fabrication process, and performance of a micro-vibrator which utilizes either an un-annealed or stress-annealed Galfenol pin as the drive element. A displacement of 1.2 μm was observed with a high bandwidth of 30 kHz and a high tensile robustness withstanding a suspended weight of 500 g (6 MPa). The vibrator was also verified to be useful as a speaker which can generate clear sound from the power of a portable music player.
Journal: Sensors and Actuators A: Physical - Volume 148, Issue 1, 4 November 2008, Pages 280–284