The role of intergranular chromium carbides on intergranular oxidation of nickel based alloys in pressurized water reactors primary water
| Autor: | Catherine Guerre, Fabrice Gaslain, Pierre Laghoutaris, Hong Thai Le, Cecilie Duhamel |
|---|---|
| Přispěvatelé: | Centre des Matériaux (MAT), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude de la Corrosion Aqueuse (LECA), Service de la Corrosion et du Comportement des Matériaux dans leur Environnement (SCCME), Département de Physico-Chimie (DPC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Département de Physico-Chimie (DPC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre des Matériaux (CDM), Mines Paris - PSL (École nationale supérieure des mines de Paris) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Alloy Metallurgy Oxide chemistry.chemical_element 02 engineering and technology Intergranular corrosion engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Corrosion Carbide Chromium chemistry.chemical_compound Nickel chemistry 0103 physical sciences engineering [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Grain boundary 0210 nano-technology |
| Zdroj: | IOP Conference Series: Materials Science and Engineering IOP Conference Series: Materials Science and Engineering, IOP Publishing, 2016, 109 012004, 10 p. ⟨10.1088/1757-899X/109/1/012004⟩ IOP Conference Series: Materials Science and Engineering, 2016, 109 012004, 10 p. ⟨10.1088/1757-899X/109/1/012004⟩ |
| ISSN: | 1757-8981 1757-899X |
| DOI: | 10.1088/1757-899X/109/1/012004⟩ |
| Popis: | International audience; Alloy 600 is used in pressurized water reactors (PWRs) but is susceptible to primary water stress corrosion cracking (PWSCC). Intergranular chromium carbides have been found beneficial to reduce PWSCC. Focussed ion beam coupled with scanning electron microscopy (FIB/SEM) 3D tomography has been used to reconstruct the morphology of grain boundary oxide penetrations and their interaction with intergranular Cr carbides in Alloy 600 subjected to a PWR environment. In presence of intergranular Cr carbides, the intergranular oxide penetrations are less deep but larger than without carbide. However, the intergranular oxide volumes normalized by the grain boundary length for both samples are similar, which suggest that intergranular oxidation growth rate is not affected by carbides. Analytical transmission electron microscopy (TEM) shows that the intergranular oxide consists mainly in a spinel-type oxide containing nickel and chromium, except in the vicinity of Cr carbides where Cr 2 O 3 was evidenced. The formation of chromium oxide may explain the lower intergranular oxide depth observed in grain boundaries containing Cr carbides. |
| Databáze: | OpenAIRE |
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