TY - GEN
T1 - Thermomechanical evaluation and thermal expansion behavior of plasma-sprayed thermal barrier coatings
AU - Takagi, Kenta
AU - Kawasaki, Akira
AU - Harada, Yoshio
AU - Okazaki, Masakazu
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - We are investigating the feasibility of measuring thermal expansion coefficient (CTE) of free-standing thermal barrier coatings with a practical thickness of several hundred micrometers by mean of a widespread thermomechanical analysis toward its industrial standardization. First of all, this study conducted the preliminary investigation for the accurate measurement of thin samples with dense yettria-stabilized zirconia (YSZ) ceramics. With a sample supporting jig and proper conditions, even the usual thermomechanical analysis could give the accurate CTE values of thin samples down to 0.3mm thick. Also it showed good reproducibility with small measurement error less than 5%. In actual, this modified method could provide the reasonable CTE values of plasma-sprayed YSZ samples with thickness of >0.3mm. Further investigation with this method found a slight monotonic decrease in the CTE with annealing. This decrease was estimated to arise from the continuous change of microstructure which still went on even after saturation of sintering shrinkage. All the results demonstrated the present method to be available for the industrial standard.
AB - We are investigating the feasibility of measuring thermal expansion coefficient (CTE) of free-standing thermal barrier coatings with a practical thickness of several hundred micrometers by mean of a widespread thermomechanical analysis toward its industrial standardization. First of all, this study conducted the preliminary investigation for the accurate measurement of thin samples with dense yettria-stabilized zirconia (YSZ) ceramics. With a sample supporting jig and proper conditions, even the usual thermomechanical analysis could give the accurate CTE values of thin samples down to 0.3mm thick. Also it showed good reproducibility with small measurement error less than 5%. In actual, this modified method could provide the reasonable CTE values of plasma-sprayed YSZ samples with thickness of >0.3mm. Further investigation with this method found a slight monotonic decrease in the CTE with annealing. This decrease was estimated to arise from the continuous change of microstructure which still went on even after saturation of sintering shrinkage. All the results demonstrated the present method to be available for the industrial standard.
KW - Coefficient of thermal expansion
KW - Industrial standardization
KW - Sintering
KW - Thin zirconia ceramics
UR - http://www.scopus.com/inward/record.url?scp=75849150458&partnerID=8YFLogxK
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U2 - 10.4028/www.scientific.net/MSF.631-632.85
DO - 10.4028/www.scientific.net/MSF.631-632.85
M3 - Conference contribution
AN - SCOPUS:75849150458
SN - 0878493077
SN - 9780878493074
T3 - Materials Science Forum
SP - 85
EP - 90
BT - Multiscale, Multifunctional and Functionally Graded Materials
PB - Trans Tech Publications Ltd
T2 - 10th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials, MM and FGMs
Y2 - 22 September 2008 through 25 September 2008
ER -