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Frontiers of Materials Science

Front Mater Sci    2013, Vol. 7 Issue (1) : 91-95     DOI: 10.1007/s11706-013-0196-6
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Internal friction study of ambient aging behaviors of irradiated tungsten by Si/H ions
Jing HU1, Xian-Ping WANG1(), Qian-Feng FANG1, Zi-Qiang ZHAO2, Yan-Wen ZHANG2, Chang-Song LIU1
1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China; 2. State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
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Abstract

The aging behaviors of irradiated tungsten by high energy Si3+ and H+ ions are mainly investigated using internal friction (IF) method combined with SEM technology. The SEM analysis indicates that more severe irradiation damage appears in the surface of simultaneous dual Si3+ + H+ irradiated specimen than that in the sequential dual Si3+ + H+ irradiated specimen or the single Si3+ irradiated specimens because of the synergistic effect of Si and H irradiation. The IF background of the irradiated sample is about one order of magnitude higher than that of the unirradiated sample owing to the existence of high density fresh dislocations induced by Si/H irradiation. In the sequential dual Si3+ and H+ irradiated specimen, the hydrogen Snoek-Kê-K?ster (SKK) peak associated with the movement of dislocations dragging hydrogen atoms is observed and its height decreases with aging time at room temperature. As for the simultaneous dual Si3+ + H+ irradiated specimen, however, there is no such hydrogen SKK peak. The reason can be explained as hydrogen diffusion and pinning effect of dislocations.

Keywords tungsten      irradiation damage      internal friction      hydrogen--dislocation interaction     
Corresponding Authors: WANG Xian-Ping,Email:xpwang@issp.ac.cn   
Issue Date: 05 March 2013
 Cite this article:   
Jing HU,Xian-Ping WANG,Qian-Feng FANG, et al. Internal friction study of ambient aging behaviors of irradiated tungsten by Si/H ions[J]. Front Mater Sci, 2013, 7(1): 91-95.
 URL:  
http://journal.hep.com.cn/foms/EN/10.1007/s11706-013-0196-6
http://journal.hep.com.cn/foms/EN/Y2013/V7/I1/91
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Jing HU
Xian-Ping WANG
Qian-Feng FANG
Zi-Qiang ZHAO
Yan-Wen ZHANG
Chang-Song LIU
Fig.1  Variation of surface morphology of the tungsten samples under different irradiated conditions: unirradiated; single Si irradiated; sequential dual Si + H irradiated; simultaneous dual Si + H irradiated.
Fig.2  Variation of IF () and relative modulus () with temperature for the unirradiated and irradiated tungsten samples without any aging history.
Fig.3  IF () and relative modulus () for the sequential dual Si + H irradiated sample after different aging time.
Fig.4  The variation of IF () and relative modulus () versus temperature for the simultaneous dual Si + H irradiated sample after different aging time.
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