Title

High-temperature acoustic emission sensing tests using a Yttrium calcium oxyborate sensor

RIS ID

106399

Publication Details

Johnson, J. A., Kim, K., Zhang, S., Wu, D. & Jiang, X. (2014). High-temperature acoustic emission sensing tests using a Yttrium calcium oxyborate sensor. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 61 (5), 805-814.

Abstract

Piezoelectric materials have been broadly utilized in acoustic emission sensors, but are often hindered by the loss of piezoelectric properties at temperatures in the 500°C to 700°C range or higher. In this paper, a piezoelectric acoustic emission sensor was designed and fabricated using yttrium calcium oxyborate (YCOB) single crystals, followed by Hsu Nielsen tests for high-temperature (>700°C) applications. The sensitivity of the YCOB sensor was found to have minimal degradation with increasing temperature up to 1000°C. During Hsu Nielsen tests with a steel bar, this YCOB acoustic sensor showed the ability to detect zero-order symmetric and antisymmetric modes at 30 and 120 kHz, respectively, as well as distinguish a first-order antisymmetric mode at 240 kHz at elevated temperatures up to 1000°C. The frequency characteristics of the signal were verified using a finite-element model and wavelet transformation analysis. 2014 IEEE.

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Link to publisher version (DOI)

http://dx.doi.org/10.1109/TUFFC.2014.6805694