High-temperature acoustic emission sensing tests using a Yttrium calcium oxyborate sensor
RIS ID
106399
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.
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.