Nano-indentation measurement of oxide layers formed in LBE on F/M steels
- 作者：P. Hosemann ; J.G. Swadener ; J. Welch ; N. Li
- 关键词：Mirror mode instability ; Growth rate of waves ; Plasma streamlines ; Quasi-perpendicular bow shock ; Mirror type magnetic field fluctuations
- 刊名：Journal of Nuclear Materials
- 出版年：2008
- 期刊代码：51_00223115
- 类别：ms
- 出版时间：30 June 2008
- 卷：377
- 期：1
- 页码：201-205
- 文件大小：303 K
摘要
Ferritic/martensitic (F/M) steels (T91, HT-9, EP 823) are candidate materials for future liquid lead or lead bismuth eutectic (LBE) cooled nuclear reactors. To understand the corrosion of these materials in LBE, samples of each material were exposed at 535 °C for 600 h and 200 h at an oxygen content of 10−6 wt%. After the corrosion tests, the samples were analyzed using SEM, WDX and nano-indentation in cross section. Multi-layered oxide scales were found on the sample surfaces. The compositions of these oxide layers are not entirely in agreement with the literature. The nano-indentation results showed that the E-modulus and hardness of the oxide layers are significantly lower than the values for dense bulk oxide materials. It is assumed that the low values stem from high porosity in the oxide layers. Comparison with in-air oxidized steels show that the E-modulus decreases with increasing oxide layer thickness.