TY - JOUR
T1 - Acoustic emission studies on thermal spray materials
AU - Lin, Chung Kwei
AU - Berndt, Christopher C.
N1 - Funding Information:
This research program was supported by the National Science Foundation (NSF) under the STRATMAN Program DDM 9215846 and the MRSEC Program DMR 9632570.
PY - 1998/4/1
Y1 - 1998/4/1
N2 - 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.
AB - 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.
KW - Acoustic emission
KW - Coatings
KW - Cracking mechanisms
KW - Energy distribution
KW - Statistical analysis
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U2 - 10.1016/S0257-8972(97)00531-8
DO - 10.1016/S0257-8972(97)00531-8
M3 - Article
AN - SCOPUS:0032048839
SN - 0257-8972
VL - 102
SP - 1
EP - 7
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
IS - 1-2
ER -