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Improvement of the high-temperature oxidation resistance of Zr alloy cladding by surface modification with aluminium-containing ternary carbide coatings

Tang, C.; Steinbrueck, M.; Grosse, M.; Ulrich, S.; Stueber, M.; Seifert, H.J.

Abstract (englisch):
Alumina-forming MAX phase ternary carbides are being considered as protective coatings on zirconium alloys as occident tolerant fuel (ATF) cladding because of their resistivity against high-temperature steam oxidation during occident scenarios. This study attempted to synthesize three types of Al-containing MAX phase carbides (Ti2AlC, Cr2AlC and Zr2AlC) as coatings on Zircaloy-4 substrates via deposition of elemental nanoscale multilayer thin films
using magnetron sputtering, and subsequent thermal annealing in argon. Formation of Ti2AlC and Cr2AlC MAX hases was confirmed after annealing at 800°C and 550°C, respectively, while growth of Zr(Al)C carbide rather than Zr2AlC AX phase was observed in the Zr-C-Al system. Oxidation of the three coated samples at 1000°C in steam for 1 hour evealed no protective effect of the Ti2AlC and Zr(Al)C coatings with significant spallation and cracking. The Cr2AlC oatings possess superior oxidation resistance and self-healing capability with a thin and
dense α-Al2O3 layer growth on the surface, which shows good promise as a candidate for coated ATF claddings.

Zitationen: 3
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Angewandte Werkstoffphysik (IAM-AWP)
Institut für Anorganische Chemie (AOC)
Publikationstyp Proceedingsbeitrag
Publikationsdatum 01.03.2018
Sprache Englisch
Identifikator ISBN: 978-0-89448-755-2
KITopen-ID: 1000088619
HGF-Programm 32.02.11 (POF III, LK 01) Auslegungsüberschreitende Störfälle
Erschienen in International Congress on Advances in Nuclear Power Plants: Charlotte, North Carolina, USA, 8-11 April 2018
Veranstaltung International Congress on Advances in Nuclear Power Plants (ICAPP 2018), Charlotte, NC, USA, 08.04.2018 – 11.04.2018
Verlag Curran Associates
Seiten 694-700
Nachgewiesen in Scopus
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