Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 415, Issue -, Pages 82-88Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2017.11.013
Keywords
W-Y2O3 composites; Irradiation damage; Annealing processes; Repair behavior
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Funding
- National Magnetic Confinement Fusion Program [2014GB121001B]
- National Natural Science Foundation of China [51574101, 51474083]
- Foundation of Laboratory of Nonferrous Metal Material and Processing Engineering of Anhui Province [15CZS08031]
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W-2%Y2O3 composites were prepared by wet chemical and powder metallurgy. Commercial roll tungsten was selected as a comparative sample in the He+ irradiation experiment. The experiment was conducted under He+ beam energy of 50 eV, irradiation dose of approximately 9.9 x 10(24) ions/m(2), and temperature of 1503-1553 K. The samples were annealed at 1173, 1373, and 1573 K for 1 h. The irradiation surface was observed in situ. The W-2%Y2O3 composites and pure tungsten displayed different grain orientation damage morphologies. In addition, the fuzzy structure was more likely to converge densely at the phase interface. Annealing repairs material surface irradiation damage, whereas the phase interface acts as a He+ migration channel.
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