Photothermal radiometry parametric identifiability theory for reliable and unique nondestructive coating thickness and thermophysical measurements

2017 ◽  
Vol 121 (9) ◽  
pp. 095101 ◽  
Author(s):  
X. Guo ◽  
A. Mandelis ◽  
J. Tolev ◽  
K. Tang
Keyword(s):  
Coating Thickness ◽  
Photothermal Radiometry ◽  
Parametric Identifiability

Analysis of semitransparent layered materials by modulated photothermal radiometry: application to the bonding and thickness control of enamel coatings

1986 ◽  
Vol 64 (9) ◽  
pp. 1297-1302 ◽  
Author(s):  
Michel Egee ◽  
Robert Dartois ◽  
Jean Marx ◽  
Christian Bissieux
Keyword(s):  
Theoretical Model ◽  
Thermal Resistance ◽  
Coating Thickness ◽  
Thermophysical Properties ◽  
Layered Materials ◽  
Photothermal Radiometry ◽  
Experimental Results ◽  
Adhesion Properties ◽  
Thickness Control

To use modulated photothermal radiometry to control the thermophysical properties of enamel coatings, we first analytically resolve a theoretical model with two finite semitransparent layers and thermal-resistance interface; then we experimentally study several samples with various adhesion properties. The comparison of the experimental results with the calculations allows one, under the present conditions, to point out the possibilities and limits of the method, mainly for the control of coating thickness and delaminations.

Measurement of opaque coating thickness using photothermal radiometry

1988 ◽  
Vol 53 (26) ◽  
pp. 2715-2716 ◽  
Author(s):  
S. J. Sheard ◽  
M. G. Somekh
Keyword(s):  
Coating Thickness ◽  
Photothermal Radiometry

X-RAY STUDIES RELATED TO COATING THICKNESS MEASUREMENTS

1984 ◽  
Vol 45 (C2) ◽  
pp. C2-33-C2-36 ◽  
Author(s):  
D. A. Sewell ◽  
I. D. Hall ◽  
G. Love ◽  
J. P. Partridge ◽  
V. D. Scott
Keyword(s):  
Coating Thickness ◽  
X Ray ◽  
Thickness Measurements

Analysis of methods for checking coating thickness gauges

Metrologiya ◽  
2019 ◽  
pp. 3-16
Author(s):  
V.S. Sekatsky ◽  
O.A. Gavrilova ◽  
N.V. Merzlikina ◽  
V.N. Morgun Morgun
Keyword(s):  
Coating Thickness

Evaluation of the accuracy indicators in determination of the coating thickness by crater grinding method

2020 ◽  
Vol 86 (7) ◽  
pp. 39-44
Author(s):  
K. V. Gogolinsky ◽  
A. E. Ivkin ◽  
V. V. Alekhnovich ◽  
A. Yu. Vasiliev ◽  
A. E. Tyurnina ◽  
...  
Keyword(s):  
Coating Thickness ◽  
Functional Dependence ◽  
Measurement Procedure ◽  
Metrological Certification ◽  
Measuring Instruments ◽  
Properties Of Coatings ◽  
Special Equipment ◽  
Grinding Method ◽  
Accuracy Of Measurements ◽  
Wide Range

Thickness is one of the key indicators characterizing the quality and functional properties of coatings. Various indirect methods (electromagnetic, radiation, optical) most often used in practice to measure thickness are based on the functional dependence of a particular physical parameter of the system «base – coating» on the coating thickness. The sensitivity of these procedures to the certain properties of coatings imposes the main restriction to the accuracy of measurements. Therefore, the development and implementation of the approaches based on direct measurements of geometric parameters of the coating appears expedient. These methods often belong to the class of «destructive» and, in addition to measuring instruments, require the use of special equipment. To ensure the uniformity of measurements in the laboratory or technological control, these methods are isolated as a separate procedure (method) and must undergo metrological certification in accordance with GOST R 8.563–2009. We present implementation, metrological certification and practical application of the method for measuring thickness of coatings by crater-grinding method. The principles of technical implementation of test equipment, measurement procedure and calculation formulas are described. The results of evaluating the accuracy indicators of the proposed procedure by calculation and experimental methods are presented. In both cases, the relative error did not exceed 6%. The applicability of the developed technique is shown for a wide range of coating materials (from soft metals to superhard ceramics) of different thickness (with from units to hundreds of micrometers). Apart from the goals of process control and outgoing inspection, the method can be recommended as a reference measurement procedure for calibration of measures and adjusting samples for various types of thickness gauges.

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