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High resolution electron microscopy study on the thin oxide films formed on type 316L stainless steel exposed under simulated BWR water chemistry conditions
KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik (Stängd 20120101), Funktionella material, FNM (Stängd 20120101).
2009 (Engelska)Ingår i: 14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009, 2009, s. 604-613Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

This paper describes the microstructures of the oxide films formed on a type 316L stainless steel material exposed under simulated BWR water chemistry conditions. High resolution electron microscopy (both FE-SEM and FE-TEM) was used. A TEM specimen was prepared by using focused ion beam technique. It is revealed that the inner thin oxide layer, unlike commonly believed, contains a large fraction of voids in some locations. There are concentration gradients of Fe, Ni and Cr elements in this layer. Furthermore, the TEM investigation revealed that the relatively large grains as commonly seen on the corroded surface sometimes consist of several small crystals of either different crystallographic orientations or different chemical compositions. The implication of the observed microstructures of the oxide films to the radioactivity build-up on BWR plant system piping surfaces is elaborated.

Ort, förlag, år, upplaga, sidor
2009. s. 604-613
Nyckelord [en]
Chemical compositions, Concentration gradients, Corroded surface, Crystallographic orientations, Focused ion beam technique, Large-grain, Plant systems, SEM, Small crystals, TEM, Thin oxide films, Thin oxide layers, Type 316L stainless steel, Water chemistry, Boiling water reactors, Chromium, Degradation, High resolution electron microscopy, Ion beams, Microstructure, Nuclear energy, Stainless steel, Oxide films
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URN: urn:nbn:se:kth:diva-152380Scopus ID: 2-s2.0-78649371157ISBN: 978-161738853-8 (tryckt)OAI: oai:DiVA.org:kth-152380DiVA, id: diva2:754534
Konferens
14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009, 23 August 2009 through 27 August 2009, Virginia Beach, VA, United States
Anmärkning

QC 20141010

Tillgänglig från: 2014-10-10 Skapad: 2014-09-26 Senast uppdaterad: 2014-10-10Bibliografiskt granskad

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Bergqvist, Hans
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