Thermal sprayed coatings characterization by acoustic waves

Cheeke, J.D.N.; Wang, A.; Viens, Martin

doi:10.1109/ultsym.1996.584081

Cited by 1 publication

(2 citation statements)

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“…Using the partial wave method [12], it was found that the solutions of the acoustic fields in a configuration of a transverse isotropic film coated on an isotropic plate can be separated into two families [11] as in the case of two isotropic layers. Therefore, the parameters of the coating layer can be determined separately based on the dispersion data of the two groups of modes.…”

Section: Dispersion Relation Of the Sagittal Plane Modes And The mentioning

confidence: 99%

“…The evaluation of the initial values are more accurate because they are the values at the center rather than the average value, and more parameters can be evaluated because three formulas rather than one explicit formula were derived. The MMFS method was developed for the ceramic coating case [11], in which only the SH modes were analyzed. In practice, however, the sagittal modes are mostly used in NDE, and, for our application only,Ĉ 33 is related to these modes.…”

Section: Introductionmentioning

confidence: 99%

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Characterizing unpoled piezoelectric ceramic film by Lamb-waves

Wang

Cheeke

1999

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Determination of the physical properties of unpoled ceramic films on metallic substrates is considered; the problem is important because these properties may be quite different than those in the bulk, which are caused by the effects of porosity. It is shown that the density and elastic constant C(33) can be determined by a modification of the previously used modal frequency spacing (MFS) method, involving cut-off frequencies for longitudinal and shear sagittal plane modes. This method has the advantage of great simplicity compared with the standard inversion approach. Numerical calculations show that good accuracy of the order of 2% can be obtained for density and for C(33 ) for simulations of PZT films on stainless steel, platinum, and aluminum plates.

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Section: Dispersion Relation Of the Sagittal Plane Modes And The mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%