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000874402 1001_ $$0P:(DE-HGF)0$$aChikada, Takumi$$b0$$eCorresponding author
000874402 245__ $$aDeuterium permeation behavior and its iron-ion irradiation effect in yttrium oxide coating deposited by magnetron sputtering
000874402 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2018
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000874402 520__ $$aTritium permeation through structural materials is a critical issue in fusion reactors from the viewpoints of sufficient fuel balance and radiological hazard. Ceramic coatings have been investigated as tritium permeation barrier for several decades; however, irradiation effects of the coatings on permeation are not elucidated. In this work, yttrium oxide coatings were fabricated on reduced activation ferritic/martensitic steels by radio frequency magnetron sputtering, and their microstructures and deuterium permeation behaviors were investigated before and after iron-ion irradiation at different temperatures. An as-deposited coating had a columnar structure and transformed into a granular one after annealing. An amorphous layer formed near the coating-substrate interface of irradiated coatings, and its thickness became thinner with increasing irradiation temperature. Voids of approximately 20 nm in diameter also formed in the irradiated coatings. Deuterium permeation flux of the sample irradiated to 1 dpa at room temperature was the lowest among the unirradiated and irradiated samples, and a permeation reduction factor indicated up to 390. The amorphous layer disappeared after deuterium permeation measurements due to damage recovery, while the voids remained and aggregated. The irradiation damage would accelerate nucleation of the crystal, resulting in a decrease of the permeation flux.
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000874402 7001_ $$00000-0003-3653-1682$$aFujita, Hikari$$b1
000874402 7001_ $$0P:(DE-Juel1)164145$$aEngels, Jan$$b2
000874402 7001_ $$0P:(DE-Juel1)157772$$aHouben, Anne$$b3
000874402 7001_ $$0P:(DE-HGF)0$$aMochizuki, Jumpei$$b4
000874402 7001_ $$0P:(DE-HGF)0$$aHorikoshi, Seira$$b5
000874402 7001_ $$0P:(DE-HGF)0$$aMatsunaga, Moeki$$b6
000874402 7001_ $$0P:(DE-HGF)0$$aTokitani, Masayuki$$b7
000874402 7001_ $$0P:(DE-HGF)0$$aHishinuma, Yoshimitsu$$b8
000874402 7001_ $$00000-0002-9227-2702$$aKondo, Sosuke$$b9
000874402 7001_ $$00000-0002-3049-5396$$aYabuuchi, Kiyohiro$$b10
000874402 7001_ $$0P:(DE-HGF)0$$aSchwarz-Selinger, Thomas$$b11
000874402 7001_ $$0P:(DE-HGF)0$$aTerai, Takayuki$$b12
000874402 7001_ $$0P:(DE-HGF)0$$aOya, Yasuhisa$$b13
000874402 773__ $$0PERI:(DE-600)2001279-2$$a10.1016/j.jnucmat.2018.06.008$$gVol. 511, p. 560 - 566$$p560 - 566$$tJournal of nuclear materials$$v511$$x0022-3115$$y2018
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