Author:
Torabi Milani Mina,Del Fatti Jenna,Orna Kimberley,Zhang Yixin,Sinclair Anthony
Abstract
A novel approach to designing the encapsulation for a high-temperature ultrasonic transducer to be capable of continuous operation over a temperature range of 25 to 650 °C is proposed. The transducer’s active element is a heavily damped lithium niobate disc of 3 MHz resonance frequency, operating in pulse-echo mode. The initial encapsulation design is developed based on the geometrical, thermal, mechanical, electrical, and ultrasonic requirements. Two finite element modeling systems are developed to analyze the thermal-induced stresses in the transducer at low and high temperatures as well as its ultrasonic performance. The simulation results are used to optimize the design before manufacturing a transducer prototype. The prototype is tested at room and elevated temperatures to verify performance.
Publisher
The American Society for Nondestructive Testing, Inc.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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