Han Young-Soo, Mao Xiadong, Jang Jinsung
Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Korea.
J Nanosci Nanotechnol. 2013 Nov;13(11):7524-8. doi: 10.1166/jnn.2013.7886.
The nano-sized microstructures in Fe-Cr oxide dispersion strengthened steel for Gen IV in-core applications were studied using small angle neutron scattering. The oxide dispersion strengthened steel was manufactured through hot isostatic pressing with various chemical compositions and fabrication conditions. Small angle neutron scattering experiments were performed using a 40 m small angle neutron scattering instrument at HANARO. Nano sized microstructures, namely, yttrium oxides and Cr-oxides were quantitatively analyzed by small angle neutron scattering. The yttrium oxides and Cr-oxides were also observed by transmission electron microscopy. The microstructural analysis results from small angle neutron scattering were compared with those obtained by transmission electron microscopy. The effects of the chemical compositions and fabrication conditions on the microstructure were investigated in relation to the quantitative microstructural analysis results obtained by small angle neutron scattering. The volume fraction of Y-oxide increases after fabrication, and this result is considered to be due to the formation of non-stochiometric Y-Ti-oxides.
利用小角中子散射研究了用于第四代堆芯应用的铁铬氧化物弥散强化钢中的纳米级微观结构。通过热等静压在各种化学成分和制造条件下制造了氧化物弥散强化钢。使用位于韩国原子能研究所的40米小角中子散射仪进行了小角中子散射实验。通过小角中子散射对纳米级微观结构，即氧化钇和氧化铬进行了定量分析。还通过透射电子显微镜观察了氧化钇和氧化铬。将小角中子散射的微观结构分析结果与透射电子显微镜获得的结果进行了比较。根据小角中子散射获得的定量微观结构分析结果，研究了化学成分和制造条件对微观结构的影响。制造后Y氧化物的体积分数增加，该结果被认为是由于非化学计量比的Y-Ti氧化物的形成。
