scholarly journals Fluence Dependence of Surface Morphology and Deuterium Retention in W Bulks and Nanocrystalline W Films Exposed to Deuterium Plasma

2021 ◽  
Vol 11 (4) ◽  
pp. 1619
Author(s):  
Jing Yan ◽  
Xia Li ◽  
Kaigui Zhu
Keyword(s):  
Surface Morphology ◽  
Thermal Desorption Spectroscopy ◽  
Low Energy ◽  
High Flux ◽  
Deuterium Plasma ◽  
Vacancy Clusters ◽  
Plasma Irradiation ◽  
Deuterium Retention ◽  
Fluence Dependence ◽  
Scanning Electron

The surface morphology of pure W bulks and nanocrystalline tungsten films was investigated after exposure to a low-energy (100 eV/D), high-flux (1.8 × 1021 D·m−2s−1) deuterium plasma. Nanocrystalline tungsten films of 6 μm thickness were deposited on tungsten bulks and exposed to deuterium plasma at various fluences ranging from 1.30 × 1025 to 5.18 × 1025 D·m−2. Changes in surface morphology from before to after irradiation were studied with scanning electron microscopy (SEM). The W bulk exposed to low-fluence plasma (1.30 × 1025 D·m−2) shows blisters. The blisters on the W bulk irradiated to higher-fluence plasma are much larger (~2 µm). The blisters on the surface of W films are smaller in size and lower in density than those of the W bulks. In addition, the modifications exhibit the appearance of cracks below the surface after deuterium plasma irradiation. It is suggested that the blisters are caused by the diffusion and aggregation of the deuterium-vacancy clusters. The deuterium retention of the W bulks and nanocrystalline tungsten films was studied using thermal desorption spectroscopy (TDS). The retention of deuterium in W bulks and W films increases with increasing deuterium plasma fluence when irradiated at 500 K.

Surface Modification and Deuterium Retention in Tungsten and Molybdenum Exposed to Low-Energy, High Flux Deuterium Plasmas

2008 ◽  
Vol 59 ◽  
pp. 42-45
Author(s):  
Vladimir K. Alimov ◽  
Wataru M. Shu ◽  
J. Roth ◽  
D.A. Komarov ◽  
Stefan Lindig ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Thermal Desorption Spectroscopy ◽  
Low Energy ◽  
High Flux ◽  
Plasma Exposure ◽  
Near Surface ◽  
Exposure Temperature ◽  
Deuterium Retention ◽  
Scanning Electron

Deuterium retention in single crystal and polycrystalline tungsten and molybdenum exposed to low-energy (38200 eV/D), high ion flux (10211022 D/m2s) deuterium plasmas at various temperatures were examined with the D(3He,p)4He nuclear reaction at a 3He energy varied from 0.69 to 4.0 MeV, and with thermal desorption spectroscopy. The surface morphology was examined by scanning electron microscope. Blisters formed on the Mo surfaces under plasma exposure are significantly larger in size than those for W. The D retention in the W and Mo samples increases with the exposure temperature, reaching its maximum at about 500 and 530 K (for ion fluxes of 1021 and 1022 D/m2/s), respectively, and then decreases as the temperature grows further. For polycrystalline W and Mo exposed at temperatures above 400 K, the D retention in the bulk (far beyond the ion implanted zone) is dominant. Plastic deformation caused by deuterium super-saturation within the near-surface layer is suggested as a mechanism for blister formation and creation of defects responsible for deuterium trapping at depths up to several micrometers.

scholarly journals Surface morphology and deuterium retention in tungsten and tungsten–rhenium alloy exposed to low-energy, high flux D plasma

2014 ◽  
Vol 454 (1-3) ◽  
pp. 136-141 ◽  
Author(s):  
V.Kh. Alimov ◽  
Y. Hatano ◽  
K. Sugiyama ◽  
M. Balden ◽  
M. Oyaidzu ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Low Energy ◽  
High Flux ◽  
Deuterium Retention ◽  
Rhenium Alloy ◽  
And Tungsten

scholarly journals Surface morphology and deuterium retention of tungsten after low- and high-flux deuterium plasma exposure

2014 ◽  
Vol 54 (8) ◽  
pp. 083014 ◽  
Author(s):  
M.H.J. 't Hoen ◽  
M. Balden ◽  
A. Manhard ◽  
M. Mayer ◽  
S. Elgeti ◽  
...  
Keyword(s):  
Surface Morphology ◽  
High Flux ◽  
Deuterium Plasma ◽  
Plasma Exposure ◽  
Deuterium Retention

scholarly journals Temperature dependence of surface morphology and deuterium retention in polycrystalline ITER-grade tungsten exposed to low-energy, high-flux D plasma

2012 ◽  
Vol 420 (1-3) ◽  
pp. 519-524 ◽  
Author(s):  
V.Kh. Alimov ◽  
B. Tyburska-Püschel ◽  
S. Lindig ◽  
Y. Hatano ◽  
M. Balden ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Temperature Dependence ◽  
Low Energy ◽  
High Flux ◽  
Deuterium Retention

scholarly journals Surface morphology and deuterium retention in tungsten oxide layers exposed to low-energy, high flux D plasma

2011 ◽  
Vol 409 (1) ◽  
pp. 27-32 ◽  
Author(s):  
V.K. Alimov ◽  
B. Tyburska ◽  
M. Balden ◽  
S. Lindig ◽  
J. Roth ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Tungsten Oxide ◽  
Low Energy ◽  
High Flux ◽  
Oxide Layers ◽  
Deuterium Retention

scholarly journals Surface morphology and deuterium retention in tungsten exposed to low-energy, high flux pure and helium-seeded deuterium plasmas

2009 ◽  
Vol T138 ◽  
pp. 014048 ◽  
Author(s):  
V Kh Alimov ◽  
W M Shu ◽  
J Roth ◽  
K Sugiyama ◽  
S Lindig ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Low Energy ◽  
High Flux ◽  
Deuterium Retention

The influence of impurities on the erosion of tungsten by low energy high flux deuterium plasma irradiation

2021 ◽  
pp. 153168
Author(s):  
Hanjun Tu ◽  
Shiwei Wang ◽  
Liangcheng Cui ◽  
Long Cheng ◽  
Guang-Hong Lu ◽  
...  
Keyword(s):  
Low Energy ◽  
High Flux ◽  
Deuterium Plasma ◽  
Plasma Irradiation ◽  
Influence Of Impurities
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