Acoustic emission studies on thermal spray materials

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41663

Title: Acoustic emission studies on thermal spray materials
Author(s): Lin, Chung Kwei; Berndt, Christopher C.
Abstract: Acoustic emission (AE) has been used to assess the integrity of ceramic coatings. The early studies enabled cracking mechanisms to be qualitatively assessed so that comparative studies of coating behavior could be formulated. The present work examines a quantitative assessment of crack populations and crack sizes so that more detailed analyses of 'crack density functions' can evolve for mechanistic studies of thermal spray materials. Coatings and solid deposits of thermally sprayed ceramic have been tested with the stress oriented in directions perpendicular and parallel to the spray direction. It has been determined that macrocracking with catastrophic failure occurs in the perpendicular orientation; whereas several distinct crack populations, consisting of micro- and macrocracking events, are observed for the parallel orientation.
Publication type: Journal article
Source: Surface and Coatings Technology, Vol. 102, no. 1-2 (Apr 1998), pp. 1-7
Publication year: 1998
Keyword(s): Acoustic emission testing; AE; Ceramic coatings; Coatings; Crack initiation; Cracking mechanisms; Energy distribution; Failure analysis; Sprayed coatings; Statistical analysis; Statistical methods; Stress analysis; Thermal spraying
Publisher: Elsevier
ISSN: 0257-8972
Publisher URL: http://dx.doi.org/10.1016/S0257-8972(97)00531-8
Peer reviewed