Development of anomalous small angle X-ray scattering method for analysis of radiation effect in nuclear reactor materials

Tominaga, Aki; Oba, Yojiro  ; Shobu, Takahisa  ; Tanida, Hajime  ; Owada, Kenji*; Konno, Azusa; Morooka, Satoshi  ; Motokawa, Ryuhei   ; Kumada, Takayuki   

In development of oxide-dispersed ferritic steels, it is known that precipitation of Cr rich phase hardens ferrite phase and decreases toughness in base material. Small angle X-ray scattering is a promising method for analysis of this precipitation process because the precipitate is nanometer size. However, it is usually difficult to separate the scattering between the Fe phase and Cr phase since Fe and Cr are close in atomic number. Therefore, in order to observe the state of phase separation of Cr, we developed an anomalous X-ray small angle scattering (A-SAXS) method using synchrotron radiation.