Semester

Spring

Date of Graduation

2024

Document Type

Thesis

Degree Type

MS

College

Statler College of Engineering and Mineral Resources

Department

Lane Department of Computer Science and Electrical Engineering

Committee Chair

Daryl Reynolds

Committee Co-Chair

N/A

Committee Member

Natalia Schmid

Committee Member

Brian Woerner

Abstract

This work focuses on the theory and development of LC sensors for high temperature and corrosion measurement for stainless steel and copper surfaces with power industry and general corrosion detection applications. The LC resonators were fabricated via screen printing an Ag inductor on an alumina substrate. The LC design was modeled using the ANSYS HFSS modeling package. The LC passive wireless sensors operate with resonant frequencies centered at 85-110 MHz. The wireless response of the LC sensor was interrogated and received by a radio frequency signal generator and spectrum analyzer at temperatures from 50-800 °C for copper ground planes and 50- 1000 °C for stainless steel ground planes in real-time. The corrosion kinetics of the Cu 110 and stainless steel 304 H were characterized by SEM and TGA analysis. For an ideal ground plane with no surface defects the sensor was able to display a corrosion sensitivity of approximately 0.05 MHz/µm of oxidation with a total of 170 µm of oxidation growth and a temperature sensitivity of 0.013 MHz/°C over a temperature range of 25 °C to 800 °C.

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