Deuterium diffusion in a chemical densified coating observed by NRA

Takagi, Ikuji; Kobayashi, Tomohiro; Ueyama, Y.; Moriyama, Hirotake; Nakamichi, Masaru; Nakamura, Hirofumi; Hayashi, K.

doi:10.1016/j.jnucmat.2008.12.275

Cited by 9 publications

(7 citation statements)

References 10 publications

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“…In addition to native oxides, an oxide layer might be deposited onto the base metal or the base metal might be dipped or otherwise coated with a second metal, which forms a lowpermeability oxide. Such coatings may reduce hydrogen permeability by five orders of magnitude or more [159]. Chromia, alumina, and rare-earth oxides have been studied extensively.…”

Section: Barrier Materials 4116331 Oxidesmentioning

confidence: 99%

Tritium Barriers and Tritium Diffusion in Fusion Reactors

Causey

Karnesky

Marchi

2012

Comprehensive Nuclear Materials

132

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Tritium and deuterium induce radiation in reactor materials and some radioactive tritium gas may be released. Most of the materials used in fusion reactors are metals that have relatively high permeabilities for tritium. The fusion community has been working on barriers to minimize tritium release. Unfortunately, most barrier materials work very well during laboratory experiments, but fail to meet requirements when placed in radiation environments.This chapter presents tritium permeation characteristics of various materials used in fusion reactors, including plasma-facing, structural, and barrier materials. The necessary parameters for tritium release calculations for various regions of a fusion reactor are given.

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Section: Barrier Materials 4116331 Oxidesmentioning

confidence: 99%

Tritium Barriers and Tritium Diffusion in Fusion Reactors

Causey

Karnesky

Marchi

2012

Comprehensive Nuclear Materials

132

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“…To interpret the results, the diffusion coefficient of deuterium in this coating was calculated according to Eq. (1) [10] D ¼ 1:1 Â 10 À10 expðÀ0:71eV=kTÞ ð 1Þ…”

Section: Deuterium Diffusion Measurement In the Coatingmentioning

confidence: 99%

“…Sweep gas flow rate 2.59 Nm 3 /h Ratio of partial pressure (T 2 /H 2 )1/100 Diffusion coefficient at 598 K 6.5 Â 10 À9 m 2 /s (F82H steel)[14] 1.1 Â 10 À16 m 2 /s (Coating)[10] …”

mentioning

confidence: 99%

Impact of ceramic coating deposition on the tritium permeation in the Japanese ITER-TBM

Nakamichi¹,

Nakamura²,

Hayashi³

et al. 2009

Journal of Nuclear Materials

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“…[11][12][13] TiC, TiN, SiC, aluminides, especially oxidised ceramic materials also exhibit their potential in TPB coatings. [14][15][16][17][18][19] Hydrogen or deuterium permeation reduction factor (PRF) tests have demonstrated that these barrier coatings can effectively restrain the permeation of hydrogen isotopes. 5 Al 2 O 3 , Y 2 O 3 , Er 2 O 3 , and Cr 2 O 3 are widely considered due to their advanced performances.…”

Section: Introductionmentioning

confidence: 99%