TY - JOUR
T1 - Irradiation-induced changes of the atomic distributions around the interfaces of carbides in a nuclear reactor pressure vessel steel
AU - Toyama, T.
AU - Tsuchiya, N.
AU - Nagai, Y.
AU - Almazouzi, A.
AU - Hatakeyama, M.
AU - Hasegawa, M.
AU - Ohkubo, T.
AU - Van Walle, E.
AU - Gerard, R.
N1 - Funding Information:
The authors would like to thank M. Narui and M. Yamazaki for their support for hot laboratory work and The Utility Electrabel for their permission to publish the present results on the surveillance test specimens. This work was partially supported by Grant-in-Aids for Scientific Research (Nos. 17002009, 20860018 and 20860018) and a research program of Nuclear Research, of the Ministry of Education, Culture, Sports, Science and Technology.
PY - 2010/10/15
Y1 - 2010/10/15
N2 - Irradiation-induced changes of the atomic distributions of solute and impurity elements around carbides in a reactor pressure vessel steel of a Belgium nuclear power reactor were investigated by laser-assisted local electrode-type three-dimensional atom probe, before and after in-service irradiation of 12 years. Before irradiation, nano-scale Fe-Mn-Cr-Mo carbides were found to be intragranular. The atomic distributions of Mn, Cr and Mo inside the carbide indicate that their concentrations around the inner carbide-matrix interface were enhanced, while a clear segregation of P at the interface was observed. After irradiation, the Mn concentration in the carbide increased substantially. In addition, the enhancement of Mn, Cr and Mo concentrations around the interface and the segregation of P were markedly intensified.
AB - Irradiation-induced changes of the atomic distributions of solute and impurity elements around carbides in a reactor pressure vessel steel of a Belgium nuclear power reactor were investigated by laser-assisted local electrode-type three-dimensional atom probe, before and after in-service irradiation of 12 years. Before irradiation, nano-scale Fe-Mn-Cr-Mo carbides were found to be intragranular. The atomic distributions of Mn, Cr and Mo inside the carbide indicate that their concentrations around the inner carbide-matrix interface were enhanced, while a clear segregation of P at the interface was observed. After irradiation, the Mn concentration in the carbide increased substantially. In addition, the enhancement of Mn, Cr and Mo concentrations around the interface and the segregation of P were markedly intensified.
UR - http://www.scopus.com/inward/record.url?scp=77956616796&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77956616796&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2010.08.011
DO - 10.1016/j.jnucmat.2010.08.011
M3 - Article
AN - SCOPUS:77956616796
SN - 0022-3115
VL - 405
SP - 177
EP - 180
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 2
ER -