Fabrication of a High Performance Acoustic Emission (AE) Sensor to Monitor and Diagnose Disturbances in HTS Tapes and Magnet Systems
- Authors
- Kim, Ju-Hyung; Song, Jung-Bin; Jeong, Young Hun; Lee, Young-Jin; Paik, Jong-Hoo; Kim, Woo-Seok; Lee, Haigun
- Issue Date
- 2월-2010
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- acoustic emission sensor; superconductors; piezoelectricity; dielectrics; X-ray diffraction
- Citation
- METALS AND MATERIALS INTERNATIONAL, v.16, no.1, pp.109 - 113
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- METALS AND MATERIALS INTERNATIONAL
- Volume
- 16
- Number
- 1
- Start Page
- 109
- End Page
- 113
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/117071
- DOI
- 10.1007/s12540-010-0109-5
- ISSN
- 1598-9623
- Abstract
- An acoustic emission (AE) technique was introduced as a non-destructive method to monitor sudden deformation caused by local heat concentrations and micro-cracks within superconductors and superconducting magnets. However, the detection of AE signals in a high temperature superconductor (HTS) tape is not easy because of its low signal to noise ratio caused by the noise from boiling liquid cryogen or mechanical vibration from the cryo-cooler. Therefore, high performance piezoelectric ceramics are needed to improve the sensitivity of the AE sensor. The aim of this study was to improve the piezoelectric and dielectric properties to enhance the performance of an AE sensor. This study examined the effects of Nb2O5 addition (0.0 wt.% to 2.0 wt.%) on the properties of high performance piezoelectric ceramics, Pb(Zr-0.54 Ti-0.46)O-3 + 0.2 wt.% Cr2O3, sintered at 1200 degrees C for 2 h. The performance was examined with respect to the acoustic emission response of AE sensors manufactured using the specimens with various Nb2O5 contents. Superior sensor performance was obtained for the AE sensors fabricated with the specimens containing 1.0 wt.% to 1.5 wt.% Nb2O5. The performance and characteristics of the AE sensors were in accordance with their piezoelectric and dielectric properties.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.