The aim of this paper is the characterization of materials submitted to high temperatures (up to 3000 deg C). In this field, some mechanical tests are available the experiments involve a lot of critical measurements which depends on the applied strength and on the temperature. An alternative solution is an ultrasonic method which advantages are a non destructive mechanism and a possible determination of the elastic moduli for a very weak strength to deformation ratio [1]. In that field, to determine the material behavior at high temperatures by a non destructive method, we propose three different devices.
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