http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Na, Suok-Min,Park, Jung-Jin,Lee, Seunghun,Jeong, Se-Young,Flatau, Alison B. Elsevier 2018 Materials Letters Vol.213 No.-
<P><B>Abstract</B></P> <P>Flake shaped particles of grain-oriented Fe<SUB>80</SUB>Ga<SUB>20</SUB> and Fe<SUB>73</SUB>Ga<SUB>27</SUB> alloys were prepared using a high-energy wet ball-milling process. The surface of flakes produced were predominantly parallel to the (1 0 0) crystallographic plane in flakes. These flakes possess two in-plane 〈1 0 0〉 easy axes of magnetization, which enhances magnetostrictive performance and sensitivity for use in composite materials. The deformation mechanism leading to formation of (1 0 0) grain-oriented flakes is associated with small angel crystal reorientations along slip lines similar to what occurs during rolling. Data are presented on the in-plane magnetic properties of these flakes, which were characterized using field-dependent magnetization measurements. The epoxy-bonded composites with the particle alignment exhibited high magnetostriction values of ∼103 ppm.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Cube-face (1 0 0) crystal plane fracture leads to formation of grain-oriented flakes. </LI> <LI> Flake shape is beneficial to control magnetic shape anisotropy in composite. </LI> <LI> Magnetic field alignment of particles improves magnetostrictive performances. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Development and Analysis of a Self-Sensing Magnetostrictive Actuator Design
Pratt,Jon,Flatau,Alison B. 대한기계학회 1993 Korea - U. S. Vibration Engineering Seminar Vol.1 No.1
A self-sensing magnetostrictive actuator design based on a linear systems model of magnetostrictive transduction for Terfenol-D is developed and analyzed. Self-sensing, or the ability of a transducer to sense its own motion as it is being driven, has been demonstrated for electromechanical transducers such as moving voice coil loudspeakers and, most recently, piezoelectric distributed moment actuators. In these devices, self-sensing was achieved by constructing a bridge circuit to extract a signal proportional to transducer motion even as the transducer was being driven. This approach is analyzed for a magnetostrictive device. Working from coupled electromechanical magnetostrictive transduction equations found in the literature, the concept of the transducer's $quot;blocked$quot; electrical impedance and motional impedance are developed, and a bridge design suggested and tested. However, results presented in this paper will show that magnetostrictive transduction is inherently non-linear, and does not, therefore, lend itself well to the traditional bridge circuit approach to self-sensing.
Fe–Ga alloy based magnetorheological fluid and its viscoelastic characteristics
Seung Hyuk Kwon,Suok-Min Na,Alison B. Flatau,Hyoung Jin Choi 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.82 No.-
Flake-like Galfenol particles were fabricated by a conventional rolling and texture annealing process andadopted as the magnetorheological (MR) particle. Theflake morphology and crystalline structure werescrutinized using scanning electron microscope and X-ray diffraction, respectively. The Galfenol particleshad a high saturation magnetization value of 174 emu/g and a Galfenol particle-based MR suspensionexhibited typical MR characteristics under input magneticfield strengths. While its shear stress curvesarefitted well using the Bingham model, its storage moduli showed a stable plateau area for wholeangular frequencies, suggesting distinguished solid-like behavior of the MRfluid.