Results 81 to 90 of about 139,401 (323)

Impedance Matching of Electrically Small Antenna with Ni-Zn Ferrite Film

Journal of Magnetics, 2013
We demonstrate that a partial loading of Ni 0.5 Zn 0.5 Fe₂O₄ (Ni-Zn ferrite) film remarkably improves impedance matching of electrically small Ba₃Co₂Fe 24 O 41 (Co₂Z) hexaferrite antenna. A 3 μm thick Ni-Zn ferrite film was deposited on a silicon wafer by the electrophoresis deposition process and post-annealed at 400 ℃.
Jaejin Lee, Yang-Ki Hong, Woncheol Lee, Jihoon Park   +3 more
openaire   +2 more sources

Slip Localization Intensification Mediated by Grain Boundary Sliding in a Polycrystalline Nickel‐Based Superalloy

Advanced Engineering Materials, EarlyView.
The temperature dependence of fatigue behavior in nickel‐based superalloys is investigated through high‐resolution measurements of plastic localization. While increasing temperature reduces localization and enhances fatigue performance in René 88DT, Inconel 718 exhibits a sharp degradation at intermediate temperature due to intensified slip ...
M. Calvat, D. Anjaria, I. Woo, C. Bean, D. Texier, J. C. Stinville   +5 more
wiley   +1 more source

Non‐foster impedance matching sensitivity of electrically small electric and magnetic spherical dipole antennas

Electronics Letters, 2016
The impedance bandwidth (BW) improvement property of a self‐resonant folded spherical helix electric dipole and a spherical split ring (SSR) magnetic dipole is compared when a negative reactance element is loaded on the parasitic resonator of the antennas. They have the same electrical size of ka
I.‐J. Yoon, S. Christensen, V. Zhurbenko, O.S. Kim, O. Breinbjerg   +4 more
openaire   +1 more source

Tailoring Functional Properties of Ti–Ni–Cu Shape Memory Alloy Thin Films for MEMS Actuators

Advanced Engineering Materials, EarlyView.
A comprehensive study of critical parameters required to develop well‐performing Ti–Ni–Cu thin film shape memory alloy microactuators is provided. Materials science and device integration aspects are integrated by addressing structural and physical relationships using complementary characterization techniques as well as a practical fabrication solution
Elaheh Akbarnejad, Aleksander Kostka, Gowtham Arivanandhan, Yujiao Li, Alan Savan, Manfred Kohl, Alfred Ludwig   +6 more
wiley   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source

Ultrasonic transducers for wideband attenuation measurements

, 1987
Includes bibliographical references.An application of ultrasound presently being investigated at the Council for Mineral Technology {MINTEK) is the measurement of the concentration of graphite particles in suspension in an agitated pulp. The principle of
Mayer, J Bertrand
core  

Electrical Characterization of 65 W Cubic Sonoreactor with Horizontally Stacked Transducers

Archives of Acoustics, 2017
A sonoreactor was assembled with stacked lead zirconate titanate transducers. These transducers were attached on one side of a 10×10×10 cm$^3$ chamber and driven by an integrated circuit power amplifier. The impedance of the reactor was analyzed in order
Pansak KERDTHONGMEE, Chat PHOLNAK, Chitnarong SIRISATHITKUL, Sorasak DANWORAPHONG   +3 more
doaj   +1 more source

A Harmonic Impedance Identification Method of Traction Network Based on Data Evolution Mechanism

Energies, 2020
In railway electrification systems, the harmonic impedance of the traction network is of great value for avoiding harmonic resonance and electrical matching of impedance parameters between trains and traction networks.
Ruixuan Yang, Fulin Zhou, Kai Zhong
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Wideband impedance matching using Tchebycheff gain functions

, 2005
A complete theoretical basis is proposed to achieve wideband impedance matching for any power line communication systems. We assume wideband impedance matching at the emission port.
Rowland, Simon; id_orcid, Goldberg, Michel, Issa, Fawzi, Li, Haiyu, F. Issa, S. Rowland, M. Goldberg, Haiyu Li   +7 more
core   +1 more source