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This paper reports a systematic in vitro degradation study of biodegradable metal zinc and zinc/iron (Zn/Fe)-couples, and explores the application of Zn/Fe-couples as the conductors in completely biodegradable sensors. By electrically connecting a bulk biodegradable metal (Zn) to a small, discontinuous amount of more active biodegradable metal (Fe), the degradation rate of the entire galvanic metal...
High frequency switch-mode power electronics operating has drawn lots of attention these days due to the increasing demand of device miniaturization and faster transient responses. Soft magnetic materials are often employed as core materials for inductors, such as DC-DC convertors and resonant inverters. Thus, magnetic materials with low core loss, large permeability, and high saturation magnetization...
The group-IV-based spintronics is extremely appealing, due to high compatibility with mainstream Si-based technology [1]. Since the discovery of giant magnetoresistance (MR) from Fe/Cr multilayers [2], extensive studies of Fe-based heterogeneous structures have been performed for spintronic applications. To sum up, taking into account the potential application of group-IV-based spintronics and the...
A large amount of research efforts have been focused on the development of Fe-based amorphous alloys, a kind of soft magnetic materials that is promising in the potential application of motors, transformers and choke coils due to their excellent soft magnetic property. The extraordinarily low coercivity is caused by the disordered structure and the lack of micro-scale anisotropy. Generally, the inclusion...
Non-oriented Silicon Steel is widely utilized as main core materials for electromechanical equipment, such as motors and generators used in civil power system, because of their attractive characteristics of high magnetic saturation point, good mechanical strength, little anisotropy, and low cost. But in the special cases of modern all electric ship (AES) [1], due to strict requirement on weight and...
Vacancy-type defects in Fe-2%Al2O3 (ODS-Fe) and pure Fe produced by helium ion irradiation at room temperature were investigated using positron beam Doppler broadening energy spectra (DBES). Defect profiles of the S parameter derived from DBES as a function of positron incident energy up to 20 KeV were analyzed. The S parameter values of the damaged layer for the ODS-Fe are smaller than those of pure...
In this study, we propose a methodology to estimate 3D+time maps of left ventricular fibre strain from human structural and dynamic MRI data. A finite element model integrates fibre principal direction throughout the left ventricle from an ex vivo human diffusion tensor MRI acquisition and motion from tagged MRI. This combination enables the estimation of fibre strain and its variation throughout...
Proper design of the iron cores is crucial for a saturated iron core superconducting fault current limiter. An optimized design requires guaranteeing sufficient magnetic saturation on the iron cores holding the AC coils, ensuring the efficiency of current limiting, minimizing the use of materials, as well as satisfying the safety and stability obligations. One of the key tasks in the design is the...
Lanthanum doped lead zirconate titanate [(Pb,La)(Zr,Ti)O3] transparent ceramics show relaxor behavior when the content of Lanthanum is 4-14% and molar ratio of Zr/Ti is 65/35. They were known as important electro-optical materials, but few researches had been focused on their electromechanical behavior. In the present work, we report a large recoverable electrostrain of about 0.2% at 1.0 kV/mm in...
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