Effect of High Energy W6+ Pre-implantation on Surface Microstructure of Tungsten Irradiated by Low-energy Hydrogen Ions

doi:10.11901/1005.3093.2015.428

Chinese Journal of Materials Research

2016, Vol. 30

Issue (4): 277-284 DOI: 10.11901/1005.3093.2015.428

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Effect of High Energy W⁶⁺ Pre-implantation on Surface Microstructure of Tungsten Irradiated by Low-energy Hydrogen Ions

YANG Ming, FAN Hongyu^**(

), XIE Xiaodong, GUO Yiming, LIU Yunhe, LI Kun

School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, China

Cite this article:

YANG Ming, FAN Hongyu, XIE Xiaodong, GUO Yiming, LIU Yunhe, LI Kun. Effect of High Energy W⁶⁺ Pre-implantation on Surface Microstructure of Tungsten Irradiated by Low-energy Hydrogen Ions. Chinese Journal of Materials Research, 2016, 30(4): 277-284.

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Abstract

Bare and high-energy (20 MeV) W⁶⁺ pre-implanted polycrystalline tungsten samples were irradiated with low-energy H-ions. The effect of H-ions energy (20-520 eV) and irradiation temperature (673-1073 K) on the microstructure evolution of these samples was characterized by means of non-destructive conductive atomic force microscopy and scanning electron microscopy in terms of the surface morphology and distribution of irradiation induced defects. The results show that a large number of nanometer-sized protuberances were formed on the irradiated tungsten samples, but the irradiation induced damage for the pre-implanted ones was slighter than the bare ones. For pre-implanted samples, low-energy H ions irradiation results in a random distribution of nanometer-sized protuberances, indicating that high-energy W⁶⁺ implantation can release the surface damage of tungsten induced by low-energy H ions to some extent. It also showed that the release effect was decreased when the irradiation temperature was higher than 1073 K.

Key words: metallic materials tungsten conductive atomic force microscope surface damage irradiation

Received: 27 July 2015

ZTFLH:

O77

Fund: Supported by National Natural Science Foundation of China No.11405023, Scientific Research Project of Education Department of Liaoning Province No.L2014539, College Students Innovation Training Project of Liaoning Province No.S201512026068, and “Taiyangniao” Student Research Project of Dalian Nationalities University No.tyn2015302

About author: To whom correspondence should be addressed, Tel: (0411)87924857, E-mail: fanhy@dlnu.edu.cn

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	Ming YANG
	Hongyu FAN
	Xiaodong XIE
	Yiming GUO
	Yunhe LIU
	Kun LI

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https://www.cjmr.org/EN/10.11901/1005.3093.2015.428 OR https://www.cjmr.org/EN/Y2016/V30/I4/277

Fig.1 Topography (left) and simultaneously measured current image (right) obtained using CAFM of H ions irradiated W samples with energy of 20 eV (a), 120 eV (b) and 520 eV (c)

Fig.2 Topography (left) and simultaneously measured current image (right) obtained using CAFM of H ions irradiated pre-implanted W samples with energy of 20 eV (a), 120 eV (b) and 520 eV (c)

Fig.3 Topography (left) and simultaneously measured current image (right) obtained using CAFM of H ions irradiated W samples at 673 K (a), 873 K(b) and 1073 K (c)

Fig.4 Topography (left) and simultaneously measured current image (right) obtained using CAFM of H ions irradiated pre-implanted W samples at 673 K (a) and 1073 K (b)

Fig.5 SEM images of surface of H ions irradiated W samples at 20 eV, 873 K (a), 120 eV, 873 K (b), 520 eV, 873 K (c), 120 eV, 673 K (d) and 120 eV, 1073 K (e)

Fig.6 SEM images of surface of H ions irradiated W⁶⁺ pre-implanted samples at 20 eV, 873 K (a), 120 eV, 873 K (b), 520 eV, 873 K (c), 120 eV, 673 K (d) and 120 eV, 1073 K (e)

Fig.7 The influence of H ions energy (a) and temperature (b) on surface roughness

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