Location

La Jolla, CA

Start Date

1-1-1993 12:00 AM

Description

Synchronous demodulation techniques have been used for some time to measure thermal radiation produced by the small temperature changes associated with elastic stress in materials, the thermoelastic effect[l]. As reviewed in [2], these measurements have been employed primarily for inferring stress distributions in materials from the associated temperature distributions. Images of stress distribution have been made most often by assembling a large number of individual synchronous component measurements using specialized equipment [3]. Other investigators [4,5] have used subtraction of stroboscopic samples to build up similar images. Recently, techniques using full-field synchronous demodulation [6,7] have been reported using equipment [8] which may be configured to perform a large number of thermal measurements. In this paper, the elements of the measurement system are used to provide information useful in characterizing the thermal properties of a coating on a substrate.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

12B

Chapter

Chapter 6: Material Properties

Section

Thin Films and Coatings

Pages

1923-1930

DOI

10.1007/978-1-4615-2848-7_246

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Thermal Coating Characterization Using Thermoelasticity

La Jolla, CA

Synchronous demodulation techniques have been used for some time to measure thermal radiation produced by the small temperature changes associated with elastic stress in materials, the thermoelastic effect[l]. As reviewed in [2], these measurements have been employed primarily for inferring stress distributions in materials from the associated temperature distributions. Images of stress distribution have been made most often by assembling a large number of individual synchronous component measurements using specialized equipment [3]. Other investigators [4,5] have used subtraction of stroboscopic samples to build up similar images. Recently, techniques using full-field synchronous demodulation [6,7] have been reported using equipment [8] which may be configured to perform a large number of thermal measurements. In this paper, the elements of the measurement system are used to provide information useful in characterizing the thermal properties of a coating on a substrate.