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Proceedings Paper

Enhancement of impact-induced mechanoluminescence for structure health monitoring using swift heavy ion irradiation
Author(s): T. Z. Zhan; C. N. Xu; H. Yamada; Y. Terasawa; L. Zhang; H. Iwase; M. Kawai
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Paper Abstract

Mechanoluminescence (ML) materials have recently attracted considerable attention due to their potential applications as an imaging sensor for detecting damages and measuring stress distributions in complex structures, which is difficult for conventional methods. SrAl2O4:Eu2+ (SAOE) is a ML material with the best performance but it hydrolyzes rapidly under humid environment, which limits the scope of its applications especially in outdoor environments, e.g. structural health monitoring for buildings, bridges and tunnels. Thus ML materials with water resistance such as silicates and aluminosilicates have been developed, but the brightness of which is still much lower than SAOE. In this study, we report a novel method to improve the impact-induced ML in ML materials using the swift heavy ion (SHI) irradiation. The impact-induced ML intensity of CaSrAl2Si2O8:Eu2+ was dramatically enhanced by about one order of magnitude using SHI irradiation. Furthermore, higher electronic stopping power and higher irradiation fluence were found to be more effective for improving the impact-induced ML. It is considered that the trap density suitable for the impactinduced ML was increased by the SHI irradiation, resulting in the impact-induced ML enhancement. The underlying mechanism was discussed, which is of great importance for developing new ML materials for structure health monitoring.

Paper Details

Date Published: 28 March 2012
PDF: 7 pages
Proc. SPIE 8342, Behavior and Mechanics of Multifunctional Materials and Composites 2012, 83421T (28 March 2012); doi: 10.1117/12.921510
Show Author Affiliations
T. Z. Zhan, Kyushu Univ. (Japan)
C. N. Xu, Kyushu Univ. (Japan)
National Institute of Advanced Industrial Science and Technology (Japan)
CREST, Japan Science and Technology Agency (JST) (Japan)
H. Yamada, Kyushu Univ. (Japan)
National Institute of Advanced Industrial Science and Technology (Japan)
Y. Terasawa, Kyushu Univ. (Japan)
L. Zhang, National Institute of Advanced Industrial Science and Technology (Japan)
H. Iwase, High Energy Accelerator Research Organization (Japan)
M. Kawai, High Energy Accelerator Research Organization (Japan)


Published in SPIE Proceedings Vol. 8342:
Behavior and Mechanics of Multifunctional Materials and Composites 2012
Nakhiah C. Goulbourne; Zoubeida Ounaies, Editor(s)

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