TY - JOUR
T1 - EFTEM and EELS analysis of the oxide layer formed on HCM12A exposed to SCW
AU - Bischoff, Jeremy
AU - Motta, Arthur T.
N1 - Funding Information:
The authors would like to thank Trevor Clark and Joe Kulik for their help in the TEM sample preparation and examination. This publication was supported by the Pennsylvania State University Materials Research Institute Nanofabrication Lab and the National Science Foundation Cooperative Agreement No. 0335765, National Nanotechnology Infrastructure Network, with Cornell University. This study was funded by DOE-NERI Project DE-FC07-06ID14744.
PY - 2012/11
Y1 - 2012/11
N2 - The inner-diffusion layer interface of an HCM12A sample oxidized in 600°C supercritical water (SCW) was analyzed using EFTEM and EELS. The EFTEM analysis showed the presence of chromium-rich zones linked with the porosity within the inner layer, as well as a nanometric iron-chromium separation, which may be linked with the presence of both Fe 3O 4 and FeCr 2O 4 in this layer. The diffusion layer was characterized by large chromium-rich oxides located at the tempered martensite lath boundaries, which suggested the preferential grain boundary diffusion of oxygen and the preferential oxidation of the chromium carbides present at these boundaries. The metal grains of the diffusion layer contained nanometric chromium-rich spinel oxides. The presence of large chromium-rich oxide precipitates in the diffusion layer appears to help improve the corrosion resistance of these alloys.
AB - The inner-diffusion layer interface of an HCM12A sample oxidized in 600°C supercritical water (SCW) was analyzed using EFTEM and EELS. The EFTEM analysis showed the presence of chromium-rich zones linked with the porosity within the inner layer, as well as a nanometric iron-chromium separation, which may be linked with the presence of both Fe 3O 4 and FeCr 2O 4 in this layer. The diffusion layer was characterized by large chromium-rich oxides located at the tempered martensite lath boundaries, which suggested the preferential grain boundary diffusion of oxygen and the preferential oxidation of the chromium carbides present at these boundaries. The metal grains of the diffusion layer contained nanometric chromium-rich spinel oxides. The presence of large chromium-rich oxide precipitates in the diffusion layer appears to help improve the corrosion resistance of these alloys.
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U2 - 10.1016/j.jnucmat.2012.06.017
DO - 10.1016/j.jnucmat.2012.06.017
M3 - Article
AN - SCOPUS:84864261243
VL - 430
SP - 171
EP - 180
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - 1-3
ER -