Deuterium-induced nanostructure formation on tungsten exposed to high-flux plasma

H. Y. Xu; G. De Temmerman; G. N. Luo; Y. Z. Jia; Y. Yuan; B. Q. Fu; A. Godfrey; W. Liu

doi:10.1016/j.jnucmat.2014.11.039

Deuterium-induced nanostructure formation on tungsten exposed to high-flux plasma

H. Y. Xu^*
, G. De Temmerman
, G. N. Luo
, Y. Z. Jia
, Y. Yuan
, B. Q. Fu
, A. Godfrey
, W. Liu

^*Corresponding author for this work

Tsinghua University
Science and Technology on Surface Physics and Chemistry Laboratory
The Dutch Research Council
ITER
CAS - Institute of Plasma Physics

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Abstract Surface topography of polycrystalline tungsten (W) have been examined after exposure to a low-energy (38 eV/D), high-flux (∼1.1-1.5 × 10²⁴ m^-2 s^-1) deuterium plasma in the Pilot-PSI linear plasma device. The methods used were scanning electron microscopy (SEM), transmission electron microscopy (TEM), positron annihilation Doppler broadening (PADB) and grazing incident X-ray diffraction (GI-XRD). After exposure to high flux D plasma, blisters and nanostructures are formed on the W surface. Generation of defects was evidenced by PADB, while high stress and mixture of phases were detected in depth of 50 nm by GI-XRD. TEM observation revealed fluctuations and disordered microstructure on the outmost surface layer. Based on these results, surface reconstruction is considered as a possible mechanism for the formation of defects and nanostructures.

Original language	English
Article number	48633
Pages (from-to)	308-311
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	463
DOIs	https://doi.org/10.1016/j.jnucmat.2014.11.039
State	Published - 22 Jul 2015
Externally published	Yes

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10.1016/j.jnucmat.2014.11.039

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@article{235001c5dd9e4a0fa640424364aa4ff3,

title = "Deuterium-induced nanostructure formation on tungsten exposed to high-flux plasma",

abstract = "Abstract Surface topography of polycrystalline tungsten (W) have been examined after exposure to a low-energy (38 eV/D), high-flux (∼1.1-1.5 × 1024 m-2 s-1) deuterium plasma in the Pilot-PSI linear plasma device. The methods used were scanning electron microscopy (SEM), transmission electron microscopy (TEM), positron annihilation Doppler broadening (PADB) and grazing incident X-ray diffraction (GI-XRD). After exposure to high flux D plasma, blisters and nanostructures are formed on the W surface. Generation of defects was evidenced by PADB, while high stress and mixture of phases were detected in depth of 50 nm by GI-XRD. TEM observation revealed fluctuations and disordered microstructure on the outmost surface layer. Based on these results, surface reconstruction is considered as a possible mechanism for the formation of defects and nanostructures.",

author = "Xu, \{H. Y.\} and \{De Temmerman\}, G. and Luo, \{G. N.\} and Jia, \{Y. Z.\} and Y. Yuan and Fu, \{B. Q.\} and A. Godfrey and W. Liu",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2015",

month = jul,

day = "22",

doi = "10.1016/j.jnucmat.2014.11.039",

language = "英语",

volume = "463",

pages = "308--311",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Deuterium-induced nanostructure formation on tungsten exposed to high-flux plasma

AU - Xu, H. Y.

AU - De Temmerman, G.

AU - Luo, G. N.

AU - Jia, Y. Z.

AU - Yuan, Y.

AU - Fu, B. Q.

AU - Godfrey, A.

AU - Liu, W.

PY - 2015/7/22

Y1 - 2015/7/22

N2 - Abstract Surface topography of polycrystalline tungsten (W) have been examined after exposure to a low-energy (38 eV/D), high-flux (∼1.1-1.5 × 1024 m-2 s-1) deuterium plasma in the Pilot-PSI linear plasma device. The methods used were scanning electron microscopy (SEM), transmission electron microscopy (TEM), positron annihilation Doppler broadening (PADB) and grazing incident X-ray diffraction (GI-XRD). After exposure to high flux D plasma, blisters and nanostructures are formed on the W surface. Generation of defects was evidenced by PADB, while high stress and mixture of phases were detected in depth of 50 nm by GI-XRD. TEM observation revealed fluctuations and disordered microstructure on the outmost surface layer. Based on these results, surface reconstruction is considered as a possible mechanism for the formation of defects and nanostructures.

AB - Abstract Surface topography of polycrystalline tungsten (W) have been examined after exposure to a low-energy (38 eV/D), high-flux (∼1.1-1.5 × 1024 m-2 s-1) deuterium plasma in the Pilot-PSI linear plasma device. The methods used were scanning electron microscopy (SEM), transmission electron microscopy (TEM), positron annihilation Doppler broadening (PADB) and grazing incident X-ray diffraction (GI-XRD). After exposure to high flux D plasma, blisters and nanostructures are formed on the W surface. Generation of defects was evidenced by PADB, while high stress and mixture of phases were detected in depth of 50 nm by GI-XRD. TEM observation revealed fluctuations and disordered microstructure on the outmost surface layer. Based on these results, surface reconstruction is considered as a possible mechanism for the formation of defects and nanostructures.

UR - https://www.scopus.com/pages/publications/84937738261

U2 - 10.1016/j.jnucmat.2014.11.039

DO - 10.1016/j.jnucmat.2014.11.039

M3 - 文章

AN - SCOPUS:84937738261

SN - 0022-3115

VL - 463

SP - 308

EP - 311

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 48633

ER -

Deuterium-induced nanostructure formation on tungsten exposed to high-flux plasma

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