Paper Title:
Evaluation of Physical Property of Plasma-Sprayed Coating Based on Ultrasonic Testing
  Abstract

For the purpose of measuring physical property of a coating by non-destructive testing (NDT), acoustic characteristics of plasma-sprayed coating has been studied with the ultrasonic testing. The analytic equation of ultrasonic propagation in the coating based on spectrum analysis is deduced. A transfer function H(f) is established, which contains information on the acoustic properties of the coating. Not only the ultrasonic propagation velocity in the coating, but reflection coefficient, attenuation coefficient, density of the coating can be acquired. This method overcomes shortcomings that the acoustic parameters cannot be measured due to mutual superposition of multiple reflected waves at the same interface of the coating. Porosities of the coatings were tested by buoyancy method. It is found these parameters mentioned above can characterize physical property of the coating. The relationships between porosity and reflection coefficient, sound velocity, attenuation coefficient were investigated, respectively.The results show that reflection coefficient and attenuation coefficient increases with the increase of porosity of the coating. The sound velocity decreases with the increase of porosity. The method is suitable for the evaluation of the coating quality.

  Info
Periodical
Edited by
Qi Luo
Pages
773-779
DOI
10.4028/www.scientific.net/AMM.55-57.773
Citation
X. G. Wang, Y. Z. Wang, "Evaluation of Physical Property of Plasma-Sprayed Coating Based on Ultrasonic Testing", Applied Mechanics and Materials, Vols. 55-57, pp. 773-779, 2011
Online since
May 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jai Won Byeon, C.S. Kim, S.I. Kwun, S.J. Hong
Abstract:It was attempted to assess nondestructively the degree of isothermal degradation of 2.25Cr-1Mo steel by using high frequency longitudinal...
257
Authors: Jai Won Byeon, C.S. Kim, J.H. Song, S.I. Kwun
Abstract:For the quality monitoring and reliable application of stationary gas turbine blade (vane), near surface damages in the isothermally degraded...
1998
Authors: Xiao Dong Tang, Jin Song Zhu, De Ping He
Abstract:Ultrasonic attenuation properties of two kinds of pored Al alloy were studied between 1MHz and 10MHz.. The results show that the ultrasonic...
115
Authors: U. Straube, Giovanni Mazzolai, A. Biscarini, B. Coluzzi, Fabio M. Mazzolai, Horst Beige
Abstract:The ultrasound pulse echo overlap method has been used to determine the elastic stiffness coefficients and the corresponding ultrasonic...
63
Authors: Wu Xiu Ding, Hong Yi Wang
Chapter 6: Geotechnical Engineering
Abstract:Based on the test results, the wave velocity and the attenuation rule of elastic wave of weathered zone in Longmen Grottoes are studied. The...
1509