Acoustic emission responses of plasma sprayed ceramics during four point bend tests

Chung Kwei Lin, Sang Ha Leigh, Christopher C. Berndt, Robert V. Gansert, Sanjay Sampath, Herbert Herman

研究成果: 書貢獻/報告類型章節

5 引文 斯高帕斯(Scopus)

摘要

Free standing ceramics including alumina-13 wt.% titania (AT13), alumina-3 wt.% titania (AT3), alumina-40 wt.% zirconia (AZ40), and calcia-stabilized zirconia (CSZ), were produced by water-stabilized plasma spraying. Four point bend tests were performed in the in-plane direction (i.e., spray direction) to obtain the modulus of rupture of the materials. In situ acoustic emission (AE) monitoring was used to detect cracking during the tests. The AE characteristics such as ring down counts, event duration, peak amplitude, and energy were recorded and analyzed to evaluate different cracking mechanisms. The AE responses versus time for individual tests were evaluated and two basic types of cracking mechanisms; i.e., catastrophic failure and microcracking before failure, can be observed. AT3 and AZ40 tend to exhibit microcracking before failure and CSZ shows catastrophic failure. However, both mechanisms can be observed for AT13. For the total AE responses, the amplitude distributions are skewed to the right and the energy distributions show multi-modal distributions. Micro-, transitional, and macro-cracks can be better distinguished by the energy distribution. The relative proportion of these cracks was also determined.
原文英語
主出版物標題Ceramic Engineering and Science Proceedings
編輯 Anon
發行者American Ceramic Soc
頁面44-50
頁數7
17
版本3
出版狀態已發佈 - 1996
對外發佈
事件Proceedings of the 1996 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A - Cocoa Beach, FL, USA
持續時間: 一月 7 1996一月 11 1996

其他

其他Proceedings of the 1996 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A
城市Cocoa Beach, FL, USA
期間1/7/961/11/96

ASJC Scopus subject areas

  • 陶瓷和複合材料

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