Contribution of in situ acoustic emission analysis coupled with thermogravimetry to study zirconium alloy oxidationReport as inadecuate




Contribution of in situ acoustic emission analysis coupled with thermogravimetry to study zirconium alloy oxidation - Download this document for free, or read online. Document in PDF available to download.

1 LGF-ENSMSE - UMR 5307 - Laboratoire Georges Friedel 2 PRESSIC-ENSMSE - Procédés et REactivité des Systèmes Solide-gaz, Instrumentation et Capteurs 3 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels 4 IFPEN - IFP Energies nouvelles

Abstract : Zirconium alloy zircaloy-4 corrosion behavior under oxidizing atmosphere at high temperature was studied using thermogravimetric experiment associated with acoustic emission analysis. Under a mixture of oxygen and air in helium, an acceleration of the corrosion is observed due to the detrimental effect of nitrogen which produces zirconium nitride. The kinetic rate increases significantly after a kinetic transition breakaway. This acceleration is accompanied by an acoustic emission activity. Most of the acoustic emission bursts were recorded after the kinetic transition or during the cooling of the sample. Acoustic emission signals analysis allows us to distinguish different populations of cracks in the ZrO2 layer. These cracks have also been observed by SEM on post mortem cross section of oxidized samples and by in-situ microscopy observations on the top surface of the sample during oxidation.

Keywords : metal dusting Zircaloy-4 oxidation Acoustic emission analysis high temperature corrosion thermogravimetry





Author: Omar Al Haj - Véronique Peres - Eric Serris - François Grosjean - Jean Kittel - Francois Ropital - Michel Cournil -

Source: https://hal.archives-ouvertes.fr/



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