TY - GEN
T1 - Microstructure-based prediction of properties for thermal barrier coatings
AU - Qunbo, Fan
AU - Fuchi, Wang
AU - Lu, Wang
AU - Zhuang, Ma
PY - 2009
Y1 - 2009
N2 - By using digital image processing technology, a finite element method based on thermal barrier coatings real microstructures was proposed in the present study to predict some key and basic physical properties, including thermal conductivities, thermal expansion coefficient, and elastic modulus. Effects of porosities, interfaces, as well as cracks, on the basic properties were systematically studied. Besides porosity, crack morphology will also affect the effective thermal conductivity. It was found that transverse cracks can significantly retard the transfer of the thermal flux. The effective thermal expansion coefficient and the effective elastic modulus at the interfaces are determined mainly by the compositions, and the interface morphology makes little contribution to the two properties. Furthermore, no anisotropy of the two properties was found at the interfaces. Different from traditional property-prediction methods, the methodology presented in this paper reflects real coating microstructures, thus providing more accurate results.
AB - By using digital image processing technology, a finite element method based on thermal barrier coatings real microstructures was proposed in the present study to predict some key and basic physical properties, including thermal conductivities, thermal expansion coefficient, and elastic modulus. Effects of porosities, interfaces, as well as cracks, on the basic properties were systematically studied. Besides porosity, crack morphology will also affect the effective thermal conductivity. It was found that transverse cracks can significantly retard the transfer of the thermal flux. The effective thermal expansion coefficient and the effective elastic modulus at the interfaces are determined mainly by the compositions, and the interface morphology makes little contribution to the two properties. Furthermore, no anisotropy of the two properties was found at the interfaces. Different from traditional property-prediction methods, the methodology presented in this paper reflects real coating microstructures, thus providing more accurate results.
UR - http://www.scopus.com/inward/record.url?scp=76749168594&partnerID=8YFLogxK
U2 - 10.1361/cp2009itsc0046
DO - 10.1361/cp2009itsc0046
M3 - Conference contribution
AN - SCOPUS:76749168594
SN - 9781615030040
T3 - Proceedings of the International Thermal Spray Conference
SP - 46
EP - 50
BT - Expanding Thermal Spray Performance to New Markets and Applications - Proceedings of the 2009 International Thermal Spray Conference, ITSC 2009
T2 - Expanding Thermal Spray Performance to New Markets and Applications - 2009 International Thermal Spray Conference, ITSC 2009
Y2 - 4 May 2009 through 7 May 2009
ER -