A Method for Ultrasonic Characterization of Density, Thickness and Velocity of Homogeneous Coating

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

doi:10.4028/www.scientific.net/MSF.675-677.1217

Paper Titles

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Influence of Al₂O₃ Buffer Layers on the Properties of Indium–Tin Oxide Films on PET Substrate by RF-Magnetron Sputtering
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The Fabrication of W-Cu Modified Layers on the Surface of the Continuous Casting Machine Mould Copper Plate by Infiltration
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A Method for Ultrasonic Characterization of Density, Thickness and Velocity of Homogeneous Coating
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Correlating Ultrasonic Velocity and Porosity Using FDTD Method Based on Random Pores Model
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ZrC-Zr₂Si Coating on Carbon Fiber Reinforced Silicon Carbide Matrix Composites Prepared by Pack Cementation Method
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Formation of TiO₂/Ti Composite Photocatalyst Film by 2-Step Mechanical Coating Technique
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Performance Improvement of TiO₂/Ti Composite Photocatalyst Film by Heat Oxidation Treatment
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A Method for Ultrasonic Characterization of Density, Thickness and Velocity of Homogeneous Coating

Abstract:

This paper provides a nondestructive method for determination of the density, thickness and velocity of homogeneous coating from an inversion of experimental ultrasonic reflection coefficient amplitude spectrum (URCAS). The detailed analyses of the inverse algorithm and sensitivity of URCAS to the density, thickness and velocity are presented, and the sensitivity is identified as a basis for selecting the experimental data used in inversion. An example of the method and experimental measurement for comparison was given for an epoxy coating with the thickness of 0.277 mm. The relative errors between the inversion and reference value of the density, thickness and velocity were found to be 0.5 %, 3.97 %, and 0.97 %, respectively.