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Correlating Ultrasonic Velocity and Porosity Using FDTD Method Based on Random Pores Model

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Abstract:

Ultrasonic testing porosity of TBC (thermal barrier coating) has been investigated by numerical simulation based on the implementation of FDTD (Finite Difference Time Domain) method for the RPM (random pores model). Numerical simulations of measuring ultrasonic longitudinal and transverse velocities were carried out for the plasma sprayed ZrO2 coatings with porosities ranging from 0.5 % to 4 %. The results show both longitudinal and transverse velocity decrease with the increase of porosity, which is similar to the experimental results in the reference (J. Thermal Spray Technol 12 (2003) 530-535). The investigation proves that the combination of the RPM and FDTD method is available for simulating ultrasonic testing of TBC porosity.

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Info:

Periodical:

Materials Science Forum (Volumes 675-677)

Pages:

1221-1224

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.675-677.1221

Citation:

Cite this paper

Online since:

February 2011

Authors:

Y. Zhao, Zhen Yue Ma, Li Lin, X.M. Li, M.K. Lei

Keywords:

Numerical Simulation, Porosity, Random Pores Model, TBC, Ultrasonic Testing (UT)

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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