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Comparative high-temperature oxidation tests with Zircaloy-4 in various atmospheres

Steinbrück, M. ORCID iD icon; Van Appeldorn, P.

Abstract (englisch):

This study presents results of overall 124 oxidation tests of Zircaloy-4 at 900°C, 1000°C and 1100°C in different nitrogen-containing atmospheres, namely air (oxygen-nitrogen), steam-nitrogen, steam-air, and, for comparison, pure steam under comparable boundary conditions. The experiments were conducted in a tube furnace coupled with a sophisticated gas/steam inlet system and a mass spectrometer to analyse the composition of the off-gases. The experiments confirmed the strong effect of nitrogen on the oxidation of zirconium alloys. Metallographic post-test examinations were conducted mainly using optical microscopy. The oxidation kinetics of Zircaloy-4 in atmospheres containing nitrogen was similar to each other, but was much faster compared to reference tests in pure steam. Initial local attack of nitrogen was observed for all gas mixtures containing nitrogen, whereas the oxide scale formed under steam atmosphere developed homogeneously.

Postprint §
DOI: 10.5445/IR/1000088596
Veröffentlicht am 01.01.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2018
Sprache Englisch
Identifikator urn:nbn:de:swb:90-885966
KITopen-ID: 1000088596
HGF-Programm 32.02.11 (POF III, LK 01) Auslegungsüberschreitende Störfälle
Erschienen in Proceedings of TOPFUEL Reactor Fuel Performance 2018, Prag, Tschechien, 30.09.2018-04.10.2018
Veranstaltung TOPFUEL Reactor Fuel Performance (2018), Prag, Tschechien, 30.09.2018 – 04.10.2018
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