Failure and acoustic-emission response of plasma-sprayed ZrO2-8 wt% Y2O3 coatings

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41586

Title: Failure and acoustic-emission response of plasma-sprayed ZrO2-8 wt% Y2O3 coatings
Author(s): Shankar, N. Ravi; Berndt, Christopher C.; Herman, Herbert
Abstract: It is critical to understand fundamental failure processes in order to design coatings for engineering purposes. The failure of ZrO2-8 wt% Y2O3 plasma-sprayed coatings is examined in the present work. The coatings were incorporated in a tensile-adhesion test arrangement and the acoustic emission (AE) was monitored. The AE generated during failure is related to the cracking process, and these are both related to the fracture morphology. Heat treatment of the coating affected changes in the AE count-rate distribution. This may be interpreted in terms of the morphological features of the coating. The relationship of the bond-strength tests to AE and fracture behavior give insight into the mechanism of adhesion of plasma-sprayed coatings.
Publication type: Conference paper
Source: Ceramic Engineering and Science Proceedings: Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials / William J. Smothers (ed.), Vol. 3, pp. 772-792
Publication year: 1982
Keyword(s): Acoustic emission; AE; Characteristics; Mechanisms; Plasma sprayed coatings; Specifications; Tensile adhesion tests
Publisher: American Ceramic Society
ISBN: 9780470373972
Publisher URL: http://dx.doi.org/10.1002/9780470318782.ch30
Peer reviewed