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Ultrasonic Non Destructive Evaluation of Microstructural Changes and Degradation of Ceramics at High Temperature

Published online by Cambridge University Press:  21 February 2011

Christian Gault*
Affiliation:
ENSCI, UA CNRS 320, Avenue Albert Thomas, 87065 LIMOGES, FRANCE
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Abstract

This paper deals with the use of pulsed ultrasonic waves to monitor microstructural changes and degradation of ceramics in the field of high temperature. Two types of devices are described. One is a low frequency system for the measurement of Young's modulus at temperatures up to 1800°C. The second is an ultrasonic spectroscopy system for the evaluation of damage in structural ceramics during thermal fatigue experiments. Applications concern phase changes, porosity evolution or microcracking induced by thermal stresses when heating monolithic or composite ceramics.

Type
Research Article
Copyright
Copyright © Materials Research Society 1989

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