Behavior of cr-coated m5 claddings during and after high temperature steam oxidationfrom 800c up to 1500c

Autor: Brachet, J.C., Guilbert, T., Lesaux, M., Rousselot, J., Nony, G., Toffolon-Masclet, C., Schuster, F., Palancher, H., Bischoff, J., Augereau, J., Pouillier, E.
Přispěvatelé: CADARACHE, Bibliothèque, CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), FRAMATOME, EDF R&D (EDF R&D), EDF (EDF)
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Topfuel 2018
Topfuel 2018, Sep 2018, Prague, Czech Republic
Popis: International audience; One-sided steam oxidation tests have been conducted at various temperatures between 1000 and 1500°C on several facilities on 12-15µm thick Cr-coated M5 claddings. Microstructural observations and micro-chemical analysis have been performed after oxidation and quenching. Some post-quenching ring compression tests have been also carried out to assess the residual strength/ductility of the Cr-coated materials oxidized at High Temperature (HT). It was confirmed that in the 1000-1300°C oxidation temperature range, the oxidation resistance of the coated materials was enhanced, with a significant additional "coping period" at HT before the material became macroscopically brittle during and/or after quenching. The study was then extended to steam oxidation temperatures higher than 1300°C (Design Extension Conditions). Those tests have confirmed that a eutectic reaction occurred between the zirconium-based substrate and the residual metallic Cr coating above 1300°C. For the DEC-type conditions applied, the tested Cr-coated clad segments did not fail upon the final water quenching while some uncoated reference segments did.
Databáze: OpenAIRE
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