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Title: Formation of bubbles and blisters in hydrogen ion implanted polycrystalline tungsten

Abstract

Tungsten (W) has been regarded as one of the most promising plasma facing materials (PFMs) in fusion reactors. The formation of bubbles and blisters during hydrogen (H) irradiation will affect the properties of W. The dependence of implantation conditions,such as fluence and energy, is one of the many great interests. In this work, polycrystalline tungsten samples were separated into two groups for study. The thick samples were implanted by 18 keV H3+ ions to fluences of 1E18, 1E19 and 1E20 H+/cm2, respectively. Another thick sample was also implanted by 80 keV H2+ ions to a fluence of 2E17 H+/cm2 for comparison. Moreover, the thin samples were implanted by 18 keV H3+ ions to fluences of 9.38E16, 1.88E17 and 5.63E17 H+/cm2, respectively. Focused ion beam (FIB) combined with scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used for micro-structure analysis, while time-of-flight ion mass spectrometry (ToF-SIMS) was used to characterize the H depth profile. It is indicated that bubbles and blisters could form successively with increasing H+ fluence. H bubbles are formed at a fluence of ~ 5.63E17 H+/cm2, and H blisters are formed at ~ 1E19 H+/cm2 for 18 keV H3+ implantation. On the other hand, 80 keVmore » H2+ ions can create more trapping sites in a shallow projected range, and thus enhancing the blisters formation with a relatively lower fluence of 2E17 H+/cm2. The crack-like microstructures beneath the blisters are also observed and prefer to form on the deep side of the implanted range.« less

Authors:
ORCiD logo [1];  [1];  [2];  [1];  [1];  [2];  [1]
  1. School of Nuclear Science and Technology, Lanzhou University, Lanzhou, People’s Republic of China
  2. Pacific Northwest National Laboratory, Richland, WA, USA
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1489290
Report Number(s):
PNNL-SA-138548
Journal ID: ISSN 1042-0150
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Radiation Effects and Defects in Solids
Additional Journal Information:
Journal Volume: 173; Journal Issue: 11-12; Journal ID: ISSN 1042-0150
Publisher:
Taylor and Francis
Country of Publication:
United States
Language:
English

Citation Formats

Zhang, Jiandong, Zhao, Jiangtao, Jiang, Weilin, Guan, Xingcai, Peng, Haibo, Zhu, Zihua, and Wang, Tieshan. Formation of bubbles and blisters in hydrogen ion implanted polycrystalline tungsten. United States: N. p., 2018. Web. doi:10.1080/10420150.2018.1531411.
Zhang, Jiandong, Zhao, Jiangtao, Jiang, Weilin, Guan, Xingcai, Peng, Haibo, Zhu, Zihua, & Wang, Tieshan. Formation of bubbles and blisters in hydrogen ion implanted polycrystalline tungsten. United States. doi:10.1080/10420150.2018.1531411.
Zhang, Jiandong, Zhao, Jiangtao, Jiang, Weilin, Guan, Xingcai, Peng, Haibo, Zhu, Zihua, and Wang, Tieshan. Fri . "Formation of bubbles and blisters in hydrogen ion implanted polycrystalline tungsten". United States. doi:10.1080/10420150.2018.1531411.
@article{osti_1489290,
title = {Formation of bubbles and blisters in hydrogen ion implanted polycrystalline tungsten},
author = {Zhang, Jiandong and Zhao, Jiangtao and Jiang, Weilin and Guan, Xingcai and Peng, Haibo and Zhu, Zihua and Wang, Tieshan},
abstractNote = {Tungsten (W) has been regarded as one of the most promising plasma facing materials (PFMs) in fusion reactors. The formation of bubbles and blisters during hydrogen (H) irradiation will affect the properties of W. The dependence of implantation conditions,such as fluence and energy, is one of the many great interests. In this work, polycrystalline tungsten samples were separated into two groups for study. The thick samples were implanted by 18 keV H3+ ions to fluences of 1E18, 1E19 and 1E20 H+/cm2, respectively. Another thick sample was also implanted by 80 keV H2+ ions to a fluence of 2E17 H+/cm2 for comparison. Moreover, the thin samples were implanted by 18 keV H3+ ions to fluences of 9.38E16, 1.88E17 and 5.63E17 H+/cm2, respectively. Focused ion beam (FIB) combined with scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used for micro-structure analysis, while time-of-flight ion mass spectrometry (ToF-SIMS) was used to characterize the H depth profile. It is indicated that bubbles and blisters could form successively with increasing H+ fluence. H bubbles are formed at a fluence of ~ 5.63E17 H+/cm2, and H blisters are formed at ~ 1E19 H+/cm2 for 18 keV H3+ implantation. On the other hand, 80 keV H2+ ions can create more trapping sites in a shallow projected range, and thus enhancing the blisters formation with a relatively lower fluence of 2E17 H+/cm2. The crack-like microstructures beneath the blisters are also observed and prefer to form on the deep side of the implanted range.},
doi = {10.1080/10420150.2018.1531411},
journal = {Radiation Effects and Defects in Solids},
issn = {1042-0150},
number = 11-12,
volume = 173,
place = {United States},
year = {2018},
month = {8}
}

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