Characterization of cracking within thermal spray deposits by an acoustic emission method: extended abstract

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41685

Title: Characterization of cracking within thermal spray deposits by an acoustic emission method: extended abstract
Author(s): Berndt, Christopher C.; Lin, C. K. Chiun Ku; Leigh, Sang Ha
Abstract: Four-point bend tests with in situ acoustic emission (AE) were used to study the cracking behavior of alumina-3 % titania materials prepared by gas- and water-stabilized plasma technologies (GSP and WSP, respectively). Catastrophic failure was observed for GSP-sprayed samples while WSP-sprayed samples exhibited microcracking before failure. The amplitude and energy distributions were also investigated, and it was determined that the percentage of macrocracks for GSP-sprayed samples is much larger than for WSP-sprayed samples. The processing effects, which induced differences in microstructure, may account for the differences in AE responses.
Publication type: Journal article
Source: Journal of Thermal Spray Technology, Vol. 7, no. 3 (Sep 1998), pp. 334-336
Publication year: 1998
Keyword(s): Acoustic emission testing; AE; Alumina; Crack initiation; Cracking mechanisms; Cracking of composites; Failure analysis; Gas-stabilized plasma spraying; GSP spraying; Mechanical testing; Microcracks; Microstructure; Plasma spraying; Sprayed coatings; Thermal spray; Titanium dioxide; Thermal spraying; Water-stabilized plasma spraying; WSP spraying
Publisher: Springer
ISSN: 1059-9630
Publisher URL: http://dx.doi.org/10.1361/105996398770350800
Peer reviewed