Nanoscale surface morphology of tungsten materials induced by Be-seeded D-He plasma exposure

K. Tokunaga, M. J. Baldwin, R. P. Doerner, D. Nishijima, H. Kurishita, T. Fujiwara, K. Araki, Y. Miyamoto, N. Ohno, Y. Ueda

Research output: Contribution to journalArticle

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Abstract

Ultra-fine grain W-(0.5, 1.5)wt%TiC alloys and stress relieved powder metallurgy W have been exposed to D-He mixed plasmas, some with added Be. The fixed exposure conditions are ion energy 60 eV and flux 3 to 6 × 10 22/m2 s. Sample temperature is 1123 K and exposure times scanned 1000-11,000 s. Typical He/D ion is 0.2 and Be is 0.2% of the plasma. A remarkable change of the tungsten surfaces results from the plasma exposures. Formation of a nano-structured layer on the exposure surfaces is observed and believed to be related to He bubble formation. In addition, the growth rate of the nano-structured layer depends on the microstructure of the samples. In the case of a D-He plasma with Be, at 60 eV, plasma sputters away most of Be deposits with little effect on the He induced nano-structured layer formation.

Original languageEnglish
Pages (from-to)528-532
Number of pages5
JournalJournal of Nuclear Materials
Volume417
Issue number1-3
DOIs
Publication statusPublished - Oct 1 2011

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Tungsten
Surface morphology
tungsten
Plasmas
Ions
Bubble formation
powder metallurgy
Powder metallurgy
ions
bubbles
Deposits
deposits
Fluxes
microstructure
Microstructure
Temperature

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Cite this

Tokunaga, K., Baldwin, M. J., Doerner, R. P., Nishijima, D., Kurishita, H., Fujiwara, T., ... Ueda, Y. (2011). Nanoscale surface morphology of tungsten materials induced by Be-seeded D-He plasma exposure. Journal of Nuclear Materials, 417(1-3), 528-532. https://doi.org/10.1016/j.jnucmat.2011.01.078

Nanoscale surface morphology of tungsten materials induced by Be-seeded D-He plasma exposure. / Tokunaga, K.; Baldwin, M. J.; Doerner, R. P.; Nishijima, D.; Kurishita, H.; Fujiwara, T.; Araki, K.; Miyamoto, Y.; Ohno, N.; Ueda, Y.

In: Journal of Nuclear Materials, Vol. 417, No. 1-3, 01.10.2011, p. 528-532.

Research output: Contribution to journalArticle

Tokunaga, K, Baldwin, MJ, Doerner, RP, Nishijima, D, Kurishita, H, Fujiwara, T, Araki, K, Miyamoto, Y, Ohno, N & Ueda, Y 2011, 'Nanoscale surface morphology of tungsten materials induced by Be-seeded D-He plasma exposure', Journal of Nuclear Materials, vol. 417, no. 1-3, pp. 528-532. https://doi.org/10.1016/j.jnucmat.2011.01.078
Tokunaga, K. ; Baldwin, M. J. ; Doerner, R. P. ; Nishijima, D. ; Kurishita, H. ; Fujiwara, T. ; Araki, K. ; Miyamoto, Y. ; Ohno, N. ; Ueda, Y. / Nanoscale surface morphology of tungsten materials induced by Be-seeded D-He plasma exposure. In: Journal of Nuclear Materials. 2011 ; Vol. 417, No. 1-3. pp. 528-532.
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