Behavior of cr-coated m5 claddings during and after high temperature steam oxidationfrom 800c up to 1500c - Archive ouverte HAL Access content directly
Conference Papers Year : 2018

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

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Abstract

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.
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Dates and versions

cea-02328975 , version 1 (04-12-2019)

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  • HAL Id : cea-02328975 , version 1

Cite

J.C. Brachet, T. Guilbert, M. Lesaux, J. Rousselot, G. Nony, et al.. Behavior of cr-coated m5 claddings during and after high temperature steam oxidationfrom 800c up to 1500c. Topfuel 2018, Sep 2018, Prague, Czech Republic. ⟨cea-02328975⟩

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