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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41663
- Acoustic emission studies on thermal spray materials
- Lin, Chung Kwei; Berndt, C. C.
- 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
- Surface and Coatings Technology, Vol. 102, no. 1-2 (Apr 1998), pp. 1-7
- Publication year
- 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 URL
- Copyright © 1998 Elsevier Science S.A.
- Peer reviewed