Effects of Si <sup>3+</sup> and H<sup> +</sup> Irradiation on Tungsten Evaluated by Internal Friction Method

HU Jing (胡菁); ZHANG Yanwen (张艳文); WANG Xianping (王先平); et al.

doi:10.1088/1009-0630/15/10/20

Plasma Science and Technology > 2013 > 15(10): 1071-1075. > DOI: 10.1088/1009-0630/15/10/20

HU Jing (胡菁), ZHANG Yanwen (张艳文), WANG Xianping (王先平), et al.. Effects of Si ³⁺ and H⁺ Irradiation on Tungsten Evaluated by Internal Friction Method[J]. Plasma Science and Technology, 2013, 15(10): 1071-1075. DOI: 10.1088/1009-0630/15/10/20

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Effects of Si ³⁺ and H⁺ Irradiation on Tungsten Evaluated by Internal Friction Method

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

Funds: supported by National Natural Science Foundation of China (Nos.11075177, 11175203, 91126002) and Strategic Priority Research Program of Chinese Academy of Sciences (Nos. KJCX2-YW-N35, XDA03010303) and the National Magnetic Confinement Fusion Program of China (No.2011GB108004) and MOST of China (Nos.2010CB832902, 2010CB832904)

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Received Date: April 09, 2012

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Abstract

Abstract

Effects of Si ³⁺ and H ⁺ irradiation on tungsten were investigated by internal friction (IF) technique. Scanning electron microscope (SEM) analysis revealed that sequential dual Si+H irradiation resulted in more serious damage than single Si irradiation. After irradiation, the IF background was significantly enhanced. Besides, two obvious IF peaks were initially found in tem- perature range of 70∼330 K in the sequential Si+H irradiated tungsten sample. The mechanism of increased IF background for the irradiated samples was suggested to originate from the high density dislocations induced by ion irradiation. On the other hand, the relaxation peak P L and non-relaxation peak P H in the Si+H irradiated sample were ascribed to the interaction process of hydrogen atoms with mobile dislocations and transient processes of hydrogen redistribution, respectively. The obtained experimental results verified the high sensitivity of IF method on the irradiation damage behaviors in nuclear materials.
- tungsten,
- irradiation damage,
- internal friction,
- hydrogen-dislocation interaction

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