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Evaluation of drying stresses in coatings using an optical method

Raju, G. B. and Green, D. J. and Guillon, Olivier (2012):
Evaluation of drying stresses in coatings using an optical method.
In: Measurement Science and Technology, pp. 085609(1-7), 23, (8), ISSN 0957-0233,
[Online-Edition: http://dx.doi.org/10.1088/0957-0233/23/8/085609],
[Article]

Abstract

In this paper, it is shown how an optical birefringence technique can be used to determine drying stresses in alumina films. The specimen geometry consists of a transparent plate as a substrate material that is coated on both sides with colloid dispersions. The homogeneous compressive stress in the substrate is determined from the optical retardation of a laser beam. The tensile stress in the coating can be easily calculated from the force balance, without any assumptions for its mechanical properties. The stress measurement principle based on photoelasticity, calibration of the experimental setup and initial results on drying stress evolution in alumina films are presented.

Item Type: Article
Erschienen: 2012
Creators: Raju, G. B. and Green, D. J. and Guillon, Olivier
Title: Evaluation of drying stresses in coatings using an optical method
Language: English
Abstract:

In this paper, it is shown how an optical birefringence technique can be used to determine drying stresses in alumina films. The specimen geometry consists of a transparent plate as a substrate material that is coated on both sides with colloid dispersions. The homogeneous compressive stress in the substrate is determined from the optical retardation of a laser beam. The tensile stress in the coating can be easily calculated from the force balance, without any assumptions for its mechanical properties. The stress measurement principle based on photoelasticity, calibration of the experimental setup and initial results on drying stress evolution in alumina films are presented.

Journal or Publication Title: Measurement Science and Technology
Volume: 23
Number: 8
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 07 Jan 2013 12:55
Official URL: http://dx.doi.org/10.1088/0957-0233/23/8/085609
Identification Number: doi:10.1088/0957-0233/23/8/085609
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