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Open AccessTechnical Note

Pressure-Driven Micro-Casting for Electrode Fabrication and Its Applications in Wear Grain Detections

by E Cheng 1, Ben Xing 1, Shanshan Li 1,2,3,*, Chengzhuang Yu 1,2, Junwei Li 4,5,*, Chunyang Wei 1,2 and Cheng Cheng 6,*
1
School of Mechanical Engineering, Hebei University of Technology, Tianjin 300132, China
2
State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China
3
Hebei Key Laboratory of Robotic Sensing and Human-robot Interactions, Hebei University of Technology, Tianjin 300132, China
4
Department of Computer Science and Electrical Engineering, Hebei University of Technology, Langfang 065000, China
5
Institute of Biophysics, School of Science, Hebei University of Technology, Tianjin 300401, China
6
School of Engineering and Computer Science, Morehead State University, Morehead, KY 40351, USA
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(22), 3710; https://doi.org/10.3390/ma12223710
Received: 1 October 2019 / Revised: 29 October 2019 / Accepted: 30 October 2019 / Published: 10 November 2019
(This article belongs to the Special Issue Continuous Casting of Alloys with Enhanced Properties)
The microelectrode is an essential and vital part in microsensors that are largely used in industrial, chemical, and biological applications. To obtain desired microelectrodes in great quality, it is also of great necessity and significance to develop a robust method to fabricate the microelectrode pattern. This work developed a four-terminal differential microelectrode that aims at recognizing microparticles in fluids. This microelectrode pair consisted of a high height–width ratio microelectrode array fabricated using a pre-designed microelectrode pattern (a micro-scale channel) and melted liquid metal. The surface treatment of microelectrodes was also investigated to reveal its impacts on the continuality of melting metal and the quality of the fabricated microelectrode patterns. To evaluate the performance of micro-casting fabricated electrodes, a microfluidic device was packaged using a microelectrode layer and a flow layer. Then impedance cytometer experiments were performed using sample fluids with polymer particles in two different sizes in diameter (5 μm and 10 μm). In addition, engine oil was tested on the microelectrodes as complex samples. The number of abrasive particles in the engine oil can be collected from the developed microfluidic device for further analysis. View Full-Text
Keywords: microfabrication; melting metal; surface pretreatment; impedance cytometer; differential amplifier; wear particle detection microfabrication; melting metal; surface pretreatment; impedance cytometer; differential amplifier; wear particle detection
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Cheng, E.; Xing, B.; Li, S.; Yu, C.; Li, J.; Wei, C.; Cheng, C. Pressure-Driven Micro-Casting for Electrode Fabrication and Its Applications in Wear Grain Detections. Materials 2019, 12, 3710.

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