Giant Magnetostrictive Material and the Application to Actuators and Devices. Micro Mobile Robot with Giant Magnetostrictive Alloys.
نویسندگان
چکیده
منابع مشابه
Magnetostrictive Actuators Compared to Piezoelectric Actuators
Magnetostriction occurs in the most ferromagnetic materials and leads to many effects [1,2]. The most useful one to refer to is the Joule effect. It is responsible for the expansion (positive magnetostriction) or the contraction (negative) of a rod subjected to a longitudinal static magnetic field. In a given material, this magnetostrain is quadratic and occurs always in the same direction what...
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Techniques for modeling hysteresis and material nonlinearities in magnetostrictive materials are presented. Hys-teresis in these materials is due to both the driving magnetic eld and stress relations within the material and is signiicant throughout most of the drive range of the material. Two characterizations are presented here. The rst model is posed in terms of Preisach operators and is pure...
متن کاملThe principle and physical models of novel jetting dispenser with giant magnetostrictive and a magnifier
In order to develop jetting technologies of glue in LED and microelectronics packaging, giant-magnetostrictive-material (GMM) is firstly applied to increase jetting response, and a new magnifying device including a lever and a flexible hinge is designed to improve jetting characteristics. Physical models of the jetting system are derived from the magnifying structure and working principle, whic...
متن کاملMagnetic domains in magnetostrictive Fe–Ga alloys
Lorentz microscopy was applied to the observation of magnetic domains in iron-gallium (Fe–Ga) alloys. Results did not show any link between the magnetic domains and the magnetostriction enhancement by Ga addition, but did reveal that the drastic decrease in magnetostriction for Fe–31.2 at. % Ga was due to the presence of large scale precipitates. Magnetic domain features did not change in the a...
متن کاملMechanical properties of magnetostrictive iron-gallium alloys
Single crystal specimens of Fe-17 at. % Ga were tested in tension at room temperature. Specimens with a tensile axis orientation of [110] displayed slip lines on the specimen faces corresponding to slip on the {110}with a critical resolved shear stress of 220 MPa. Yielding began at 0.3% elongation and 450 MPa. An ultimate tensile strength of 580 MPa was observed with no fracture occurring throu...
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ژورنال
عنوان ژورنال: Journal of the Japan Society for Precision Engineering
سال: 1994
ISSN: 1882-675X,0912-0289
DOI: 10.2493/jjspe.60.1703