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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Rouillard, Fabien
CEA Saclay
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (32/32 displayed)
- 2024Improved Oxidation Resistance And Cr Retention Of Coated AISI441 For SOC Application
- 2024Anodic dissolution model with diffusion-migration transport for simulating localized corrosioncitations
- 2023High Temperature performances of coated and non-coated ferritic stainless steel interconnects for Solid Oxide Electrolyzer Cell application
- 2021Microstructural and Chemical Changes of a Ti-Stabilized Austenitic Stainless Steel After Exposure to Liquid Sodium at Temperatures Between 500 °C and 650 °Ccitations
- 2021Determination of residual stress gradient in a Ti-stabilized austenitic stainless steel cladding candidate after carburization in liquid sodium at 500 °C and 600 °Ccitations
- 2021Carburization and Stress Profiles Characterized by High-Energy X-ray Diffraction in 316L Austenitic Stainless Steel After Exposure at 500 °C and 600 °C in Carburizing Liquid Sodiumcitations
- 2021Carburization and Stress Profiles Characterized by High-Energy X-ray Diffraction in 316L Austenitic Stainless Steel After Exposure at 500 °C and 600 °C in Carburizing Liquid Sodiumcitations
- 2020Intermetallic formation of Al-Fe and Al-Ni phases by ultrafast slurry aluminization (flash aluminizing)citations
- 2019Carburization of austenitic and ferritic stainless steels in liquid sodium: Comparison between experimental observations and simulationscitations
- 2019Evaluation of cobalt free coatings as hardfacing material candidates in sodium-cooled fast reactor and effect of oxygen in sodium on the tribological behaviourcitations
- 2019Chemical Interaction of Austenitic and Ferritic Steels with B4C Powder in Liquid Sodium at 600°Ccitations
- 2019Stable isotopes used in the definition of corrosion mechanisms
- 2018Corrosion behaviour of Fe-9Cr steels in O$_2$ and CO$_2$ containing media thick or thin oxide scale ?
- 2018Single event experiment : a powerful approach for studying passivity breakdown pitting corrosion
- 2018An overview of corrosion issues in supercritical fluids
- 2017Carburization of austenitic and ferritic steels in carbon-saturated sodium: preliminary results on the diffusion coefficient of carbon at 873 Kcitations
- 2017Overview on corrosion in supercritical fluidscitations
- 2017Single Crystal and Sintered Alumina Corrosion in Liquid Sodiumcitations
- 2017Study On Cobalt Free Hardfacing Materials For Wear Resistance In Sodium Fast Reactors
- 2017Evaluation of the Compatibility of Aluminide Coatings in High-Temperature Sodium for Fast Reactor Applicationcitations
- 2016On the propagation of open and covered pit in 316L stainless steel.citations
- 2016Etude du mécanisme de carburation d'aciers austénitique et ferritique en milieu sodium/JECH 2016
- 2015Initiation and propagation of a single pit on stainless steel using a local probe techniquecitations
- 2015Analyse d'une piqûre unique se propageant dans un acier inoxydable
- 2015Investigation of a single pit generated with a flow microcell
- 2013Oxidation and crystallographic features of the new prototype structure Ti4NiSi4citations
- 2013Selective Oxidation of Chromium by O-2 Impurities in CO2 During Initial Stages of Oxidationcitations
- 2012A flow microdevice for studying the initiation and propagation of a single pitcitations
- 2011Single pit initiation on 316L austenitic stainless steel using scanning electrochemical microscopycitations
- 2007Mechanisms of oxide layer formation and destruction on a chromia former nickel base alloy in HTR environment
- 2007High temperature corrosion of a nickel base alloy by helium impuritiescitations
- 2007Corrosion behaviour of a high strength nickel base alloy in Gas Cooled Reactors (GCR)
Places of action
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article
Oxidation and crystallographic features of the new prototype structure Ti4NiSi4
Abstract
Équipe 103 : Composés intermétalliques et matériaux hybrides ; International audience ; The oxidation resistance and the crystal structure of the new Ti4NiSi4 compound were investigated. This compound was manufactured both as a single-phase and as the outer layer of a protective coating for vanadium alloys. The recorded oxidation rates were very low at 650 degrees C and 750 degrees C in air, which represents a more severe environment than those envisaged for the targeted application: fuel cladding for sodium-cooled fast reactors. The powder XRD measurements performed at the synchrotron SOLEIL allowed for the crystallographic structure determination of Ti4NiSi4 (S.C. Pnma; a = 15.63931; b = 5.08321; c = 12.75151) with high confidence factors (R-wp = 0.07; R-Bragg = 0.067). Its structure consists of atomic planes stacking along the b-axis with planes at coordinates y = 0, 1/4, 1/2 and 3/4; it can therefore be considered as a pseudolamellar structure. It has been suggested that this peculiar feature induces a low activation energy for the phase transformation of Ti4NiSi4 into Ti4Ni4Si7, which thus renders the transformation possible at moderate temperature. This structural rearrangement is accompanied by the liberation of Ti and Si, which leads to the formation of both TiO2 and SiO2 oxidation products, which are responsible for the high environmental resistance observed at 650 degrees C in air.