In situ TEM thermal annealing of high purity Fe10wt%Cr alloy thin foils implanted with Ti and O ions

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:461

Article

Owusu-Mensah, Martin¹  Jublot-Leclerc, Stephanie¹  Gentils, Aurelie¹  Baumier, Cedric¹  Ribis, Joel²  Borodin, Vladimir A.^3,4 

[1] Univ Paris Saclay, Univ Paris Sud, CSNSM, CNRS,IN2P3, Orsay, France

[2] Univ Paris Saclay, CEA, SRMA, DEN, Gif Sur Yvette, France

[3] NRC Kurchatov Inst, Moscow, Russia

[4] Natl Res Nucl Univ MEPhl, Moscow, Russia

关键词: Fe-Cr alloy;    Titanium;    Oxygen;    Ion implantation;    Thermal annealing;    Oxidation;    Corrosion;    Transmission Electron Microscopy;   

DOI  :  10.1016/j.nimb.2019.10.009

来源: Elsevier

【 摘 要 】

ODS steels are ferritic-martensitic steels reinforced with (Y,Ti) oxide dispersions to enhance the creep and radiation resistance at elevated temperatures. Their conventional fabrication is achieved by ball milling followed by high-temperature consolidation. An alternative approach of ion beam synthesis has been suggested recently to study the early precipitation stages of oxide nanoparticles. To clarify the details of Ti-based oxide nanoparticle precipitation, Ti+ and O( )(+)ions were implanted into high-purity Fe-10 wt%Cr thin foils at room temperature and subjected to thermal annealing. Nano-size oxide particles and larger surface oxide islands with pronounced Cr enrichment were observed after in situ Transmission Electron Microscopy (TEM) annealing at 600 degrees C and were identified as a mixed iron-chromium spinel. The features observed after ex situ annealing at 800 degrees C were also identified as iron-chromium oxide, but with a certain titanium enrichment. The observations thus suggest that titanium plays no major role in the early stages of oxide precipitation.

【 授权许可】

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