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Kikuchi, Kenji*; Rivai, A. K.*; Saito, Shigeru; Bolind, A. M.*; Kogure, Akinori*
Journal of Nuclear Materials, 431(1-3), p.120 - 124, 2012/12
Times Cited Count：6 Percentile：43.52(Materials Science, Multidisciplinary)The oxide layer on the 12Cr steel, HCM12A, is investigated using a scanning probe microscope (SPM), which was formed in lead bismuth eutectic (LBE) at 450
500
C, during 5500 hrs. Hitherto oxide formation mechanisms were studied from viewpoints of the location of original base metal surface, the pass for oxygen travel and Fe diffusion to understand the stability of oxide layer. The new findings in this research are that surface potential measurement detected the boundary between (FeCr)
O
and FeO, which is not found at the topographic mode measurement. The spinel layer can be distinguished from the bulk area with lower surface potential profile, but near the boundary between the spinel and magnetite layers the surface potential profile seems to be continuous except for the narrow path corresponding to the boundary line. The band structure penetrating magnetite and spinel layer was found, which was not found at the topography.
CRivai, A. K.*; Saito, Shigeru; Tezuka, Masao*; Kato, Chiaki; Kikuchi, Kenji*
Journal of Nuclear Materials, 431(1-3), p.97 - 104, 2012/12
Times Cited Count：10 Percentile：60.35(Materials Science, Multidisciplinary)In the present study, we applied 20% cold work (CW) treatment to JPCA austenitic stainless steel and investigated it from the corrosion behavior viewpoint. The corrosion test of 20% CW JPCA has been carried in the JLBL-1 (JAEA Lead-Bismuth Loop-1) apparatus. The maximum temperature and the exposure time of LBE were 450C and 1000 h, respectively. The results showed a different corrosion behavior between the JPCA without and with CW. As for the JPCA without CW, LBE penetrated into the matrix through a ferrite layer which was formed because of constituent metals dissolution from the matrix into LBE. As for the 20% CW JPCA, dissolution attack occurred only partially and formed localized superficial pitting corrosion. It was found that the different corrosion behavior occurred because the CW induced a structure transformation from 
-austenite to 
'-martensite and affected the corrosion resistance of the JPCA in flowing LBE at 450C.
Rivai, A. K.; Saito, Shigeru; Kato, Chiaki; Tezuka, Masao; Kikuchi, Kenji*; Kimura, Akihiko*
no journal, ,
Rivai, A. K.; Saito, Shigeru; Kato, Chiaki; Tezuka, Masao; Kikuchi, Kenji*
no journal, ,
Kikuchi, Kenji*; Bolind, A.*; Rivai, A. K.; Saito, Shigeru; Kogure, Akinori*
no journal, ,
no abstracts in English
Rivai, A. K.; Bolind, A. M.*; Saito, Shigeru; Yamazaki, Dai; Kikuchi, Kenji*
no journal, ,
CRivai, A. K.; Saito, Shigeru; Obayashi, Hironari; Tezuka, Masao*; Kato, Chiaki; Kikuchi, Kenji*
no journal, ,
