The effects of tungsten's pre-irradiation surface condition on helium-irradiated morphology

被引:16
作者
Garrison, Lauren M. [1 ]
Kulcinski, Gerald L. [1 ]
机构
[1] Univ Wisconsin, Madison, WI 53706 USA
关键词
Plasma-material interaction; Plasma-facing material; Fusion materials; Sample polishing; Tungsten; Helium ion irradiation; 1ST WALL; PORE FORMATION; IMPLANTATION; ITER; MICROSTRUCTURE; FRICTION; HE+;
D O I
10.1016/j.jnucmat.2015.07.025
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Erosion is a serious concern associated with the use of tungsten as a plasma-facing component in fusion reactors. To compare the damage progression, polycrystalline tungsten (PCW) and (110) single crystal tungsten (SCW) samples were prepared with (1) a mechanical polish (MP) with roughness values in the range of 0.018-0.020 mu m and (2) an MP and electropolish (MPEP) resulting in roughness values of 0.010-0.020 mu m for PCW and 0.003-0.005 mu m for SCW samples. Samples were irradiated with 30 keV He+ at 1173 K to fluences between 3 x 10(21) and 6 x 10(22) He/m(2). The morphologies that developed after low-fluence bombardment were different for each type of sample-MP SCW, MPEP SCW, MP PCW, and MPEP PCW. At the highest fluence, the SCW MPEP sample lost significantly more mass and developed a different morphology than the MP SCW sample. The PCW samples developed a similar morphology and had similar mass loss at the highest fluence. Surface preparation can have a significant effect on postirradiation morphology that should be considered for the design of future fusion reactors such as ITER and DEMO. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:302 / 311
页数:10
相关论文
共 43 条
[1]   Jump processes in surface diffusion [J].
Antczak, Grazyna ;
Ehrlich, Gert .
SURFACE SCIENCE REPORTS, 2007, 62 (02) :39-61
[2]   Helium induced nanoscopic morphology on tungsten under fusion relevant plasma conditions [J].
Baldwin, M. J. ;
Doerner, R. P. .
NUCLEAR FUSION, 2008, 48 (03)
[3]   Materials challenges for ITER - Current status and future activities [J].
Barabash, V. ;
Peacock, A. ;
Fabritsiev, S. ;
Kalinin, G. ;
Zinkle, S. ;
Rowcliffe, A. ;
Rensman, J.-W. ;
Tavassoli, A. A. ;
Marmy, P. ;
Karditsas, P. J. ;
Gillemot, F. ;
Akiba, M. .
JOURNAL OF NUCLEAR MATERIALS, 2007, 367 (SPEC. ISS.) :21-32
[4]  
Blakely J. M., 1969, SURF SCI, V13, P313
[5]   Helium and deuterium implantation in tungsten at elevated temperatures [J].
Cipiti, BB ;
Kulcinski, GL .
JOURNAL OF NUCLEAR MATERIALS, 2005, 347 (03) :298-306
[6]   Control of surface ripple amplitude in ion beam sputtered polycrystalline cobalt films [J].
Colino, Jose M. ;
Arranz, Miguel A. .
APPLIED SURFACE SCIENCE, 2011, 257 (09) :4432-4438
[7]   DIRECT OBSERVATIONS OF THE SURFACE-DIFFUSION OF ATOMS AND CLUSTERS [J].
EHRLICH, G .
SURFACE SCIENCE, 1991, 246 (1-3) :1-12
[8]   Irradiation resistance of grains near {001} on polycrystalline tungsten under 30 keV He+ bombardment at 1173 K [J].
Garrison, L. M. ;
Kulcinski, G. L. .
PHYSICA SCRIPTA, 2014, T159
[9]   EFFECTS OF 30 keV HELIUM IRRADIATION ON (110) SINGLE CRYSTAL TUNGSTEN [J].
Garrison, L. M. ;
Kulcinski, G. L. .
FUSION SCIENCE AND TECHNOLOGY, 2013, 64 (02) :216-220
[10]  
Hermann K., 2013, Surface Explorer Version 2