Journal
MATERIALS & DESIGN
Volume 96, Issue -, Pages 251-256Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2016.01.090
Keywords
Amorphous wires; Wire-terminal-connection; Ni/Cu composite electroplating; Impedance output stability
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Funding
- National Natural Science Foundation of China (NSFC) [51401111, 51561026]
- Natural Science Foundation of Inner Mongolia Autonomous Region of China [2014BS0503]
- NSFC [51501162]
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Impedance output stability of Co-rich amorphous wires depends largely on the wire-terminal-connection, which can be accomplished by composite electroplating towards a robust sensor application. The present experimental results indicated that Ni/Cu composite layer composed of Ni, Cu plating and passivating treatment show a homogeneous microstructure, and excellent surface wettability, weldability and thermal expansion coefficient matching under variable temperature of wire-terminal-connecting. The properties of composite electroplated layer are mainly influenced by cathode current density, electroplating time and electrolyte temperature. The inhomogeneous distributed clustering-regions, disproportionated reaction, tendency of hydrogen brittleness and crack have been reduced by optimized coactions of intermolecular Van der Waals force, inner diffusion and mechanical bonding of electroplated layer. Therefore, the wire-terminal-connection is able to effectively improve impedance output stability by minimizing the disturbance of stray capacity, decreasing radio-frequency wave emission and electromagnetic signal attenuation, and suppressing the destabilization or concussion. (C) 2016 Published by Elsevier Ltd.
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