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

doi:10.1016/j.jnucmat.2011.01.078

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

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Article

10 Citations (Scopus)

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 language	English
Pages (from-to)	528-532
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	417
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jnucmat.2011.01.078
Publication status	Published - Oct 1 2011

All Science Journal Classification (ASJC) codes

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

Access to Document

10.1016/j.jnucmat.2011.01.078

Fingerprint Dive into the research topics of 'Nanoscale surface morphology of tungsten materials induced by Be-seeded D-He plasma exposure'. Together they form a unique fingerprint.

Cite this

Tokunaga, K., Baldwin, M. J., Doerner, R. P., 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, 417(1-3), 528-532. https://doi.org/10.1016/j.jnucmat.2011.01.078

@article{4e8b638c28604fbfb0ef1e6e38a7762a,

title = "Nanoscale surface morphology of tungsten materials induced by Be-seeded D-He plasma exposure",

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.",

author = "K. Tokunaga and Baldwin, {M. J.} and Doerner, {R. P.} and D. Nishijima and H. Kurishita and T. Fujiwara and K. Araki and Y. Miyamoto and N. Ohno and Y. Ueda",

year = "2011",

month = oct,

day = "1",

doi = "10.1016/j.jnucmat.2011.01.078",

language = "English",

volume = "417",

pages = "528--532",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

number = "1-3",

}

TY - JOUR

T1 - Nanoscale surface morphology of tungsten materials induced by Be-seeded D-He plasma exposure

AU - Tokunaga, K.

AU - Baldwin, M. J.

AU - Doerner, R. P.

AU - Nishijima, D.

AU - Kurishita, H.

AU - Fujiwara, T.

AU - Araki, K.

AU - Miyamoto, Y.

AU - Ohno, N.

AU - Ueda, Y.

PY - 2011/10/1

Y1 - 2011/10/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=80053613140&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80053613140&partnerID=8YFLogxK

U2 - 10.1016/j.jnucmat.2011.01.078

DO - 10.1016/j.jnucmat.2011.01.078

M3 - Article

AN - SCOPUS:80053613140

VL - 417

SP - 528

EP - 532

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - 1-3

ER -