Study of deuterium retention in Be-W coatings with distinct roughness profiles

R. Mateus (Corresponding Author), Antti Hakola, V. Tiron, C. Porosnicu, C.P. Lungu, E. Alves

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

Three batches of pure beryllium (Be), pure tungsten (W) and mixed Be:W (50:50) coatings were deposited by using the thermionic vacuum arc (TVA) technique. Different superficial roughness and morphologies were obtained by adjusting the bias voltages in the substrate holder. The coatings were irradiated afterwards with 15keV 2H+ ions up to a fluence of 5e17ion/cm2 with the purpose to investigate the influence of the roughness parameters on the retention of deuterium in Be-W deposits in the absence of other co-deposited impurities. Current densities lower than 0.2W/cm2 were used to avoid the release of deuterium induced by heating loads. The results of the experiment point to the negligible effect of rugosity on the retention behaviour under energetic ion bombardment.
Original languageEnglish
Pages (from-to)464-467
Number of pages4
JournalFusion Engineering and Design
Volume124
Early online date2017
DOIs
Publication statusPublished - 1 Nov 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

Beryllium
Deuterium
Beryllium deposits
Surface roughness
Coatings
Tungsten
Ion bombardment
Bias voltage
Current density
Vacuum
Impurities
Ions
Heating
Substrates
Experiments

Keywords

  • beryllium
  • tungsten
  • retention
  • surface morphology

Cite this

Mateus, R. ; Hakola, Antti ; Tiron, V. ; Porosnicu, C. ; Lungu, C.P. ; Alves, E. / Study of deuterium retention in Be-W coatings with distinct roughness profiles. In: Fusion Engineering and Design. 2017 ; Vol. 124. pp. 464-467.
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Study of deuterium retention in Be-W coatings with distinct roughness profiles. / Mateus, R. (Corresponding Author); Hakola, Antti; Tiron, V.; Porosnicu, C.; Lungu, C.P.; Alves, E.

In: Fusion Engineering and Design, Vol. 124, 01.11.2017, p. 464-467.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Mateus, R.

AU - Hakola, Antti

AU - Tiron, V.

AU - Porosnicu, C.

AU - Lungu, C.P.

AU - Alves, E.

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AB - Three batches of pure beryllium (Be), pure tungsten (W) and mixed Be:W (50:50) coatings were deposited by using the thermionic vacuum arc (TVA) technique. Different superficial roughness and morphologies were obtained by adjusting the bias voltages in the substrate holder. The coatings were irradiated afterwards with 15keV 2H+ ions up to a fluence of 5e17ion/cm2 with the purpose to investigate the influence of the roughness parameters on the retention of deuterium in Be-W deposits in the absence of other co-deposited impurities. Current densities lower than 0.2W/cm2 were used to avoid the release of deuterium induced by heating loads. The results of the experiment point to the negligible effect of rugosity on the retention behaviour under energetic ion bombardment.

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