Microstructure of Cs chemisorbed stainless steel type 304

Suzuki, Eriko   ; Nakajima, Kunihisa  ; Miwa, Shuhei  ; Osaka, Masahiko  ; Hashimoto, Naoyuki*; Isobe, Shigehito*

In order to improve the cesium (Cs) chemisorption model onto stainless steel (SUS), the chemical forms and distributions of Cs compounds formed inside of the SUS oxide layer at 873-1273 K were evaluated based on the microscopic observation. It was revealed that compositions of Cs compounds varies alonbg depth from the oxide layer surface on SUS, which was tested in 1073-1273 K. In addition, an amorphous phase containing Cs was observed inside of the oxide layer on the SUS tested in 873-973 K. These results suggest that the chemical reactions occurred inside of the SUS oxide layer are different from that in the nearest region of the SUS oxide layer surface.