Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 501, Issue -, Pages 181-188Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2018.01.019
Keywords
W-Cr alloy; He irradiation behavior; Interface
Funding
- National Magnetic Confinement Fusion Program [2014GB121001, 2014GB121001B]
- National Natural Science Foundation of China [51474083, 51574101]
- Foundation of Laboratory of Nonferrous Metal Material and Processing Engineering of Anhui Province [15CZS08031]
- Grants-in-Aid for Scientific Research [15K06423] Funding Source: KAKEN
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In this study, a large-power inductively coupled plasma source was designed to perform the continuous helium ion irradiations of W-Cr binary alloy (W-20 wt% Cr) under relevant conditions of the International Thermonuclear Experimental Reactor. Surface damages and microstructures of irradiated W-20Cr were observed by using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and transmission electron microscopy. The addition of Cr dramatically enhanced the micro-hardness of the obtained bulk materials, and the interface between the W matrix and the second phase Cr-O is a semi-coherent interface. After irradiation, the doping of Cr element effectively reduces the damage of the W matrix during the irradiation process. The semi-coherent interface between the second phase and the W matrix improves the anti-irradiation performance of the W-20Cr alloy. (c) 2018 Elsevier B.V. All rights reserved.
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