A slow positron beam study of the oxidation behaviour of 310S stainless steel and alloy 800HT exposed to supercritical water

被引：6

作者：

Degmova, Jarmila ^{[1
,2
]}

Song, Yamin ^{[1
,3
]}

Li, Bingsheng ^{[4
]}

Sojak, Stanislav ^{[1
,2
]}

Cao, Xingzhong ^{[3
]}

Novotny, Radek ^{[5
]}

Novak, Michal ^{[5
]}

Egger, Werner ^{[6
]}

Krsajak, Vladimir ^{[1
,2
]}

机构：

[1] Slovak Univ Technol Bratislava, Inst Nucl & Phys Engn, Ilkovicova 3, Bratislava 81219, Slovakia

[2] Slovak Univ Technol, Adv Technol Res Inst, Fac Mat Sci & Technol, Jana Bottu 2781-25, Trnava 91724, Slovakia

[3] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[4] Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China

[5] European Commiss, Directorate G Nucl Safety & Secur, Joint Res Ctr, Petten, Netherlands

[6] Univ Bundeswehr Munchen, Inst Angew Phys & Messtech LRT2, Werner Heisenberg Weg 39, D-85577 Neubiberg, Germany

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2023年 / 202卷

关键词：

High temperature oxidation; Stainless steel; Positron annihilation spectroscopy; Slow positron beam characterisation; Supercritical water reactors; Accelerated environmental ageing; MECHANICAL-PROPERTIES; HIGH-TEMPERATURE; MICROSTRUCTURE; CORROSION; DESIGN;

D O I：

10.1016/j.supflu.2023.106057

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This paper reports a variable-energy slow positron beam characterisation of the surface oxide films in 310 S stainless steel and 800HT nickel-based alloy exposed to 550 degrees C supercritical water for 1000-4392 h. The evolution of the oxide layer was depth-profiled using positron beam energies from 0.5 to 20 keV, which enabled a probe of up to 2 mm of the near-surface region. SEM/EDS was used as a complementary characterisation tool to support and comprehend the positron annihilation spectroscopy data. A strong dependency on the positron trapping rate and the effective positron diffusion length on the microstructure of the studied materials enabled us to identify up to three non-bulk layers, which were preliminarily attributed to different oxide layers and Fe/Cr depletion regions. By calculating the effective positron diffusion length in the given multi-layer systems, we obtained the thicknesses of individual layers, which are in good agreement with the EDS analysis.

引用

页数：16

共 30 条

[11] Insights into oxidation and nitridation of alumina-forming FeCrAl alloy after supercritical water exposure: Effect of pre-corrosion on high-temperature damage behavior [J].