کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7963410 | 1514145 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface damages of polycrystalline W and La2O3-doped W induced by high-flux He plasma irradiation
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
In this study, polycrystalline tungsten (W) and three oxide dispersed strengthened W with 0.1â¯vol %, 1.0 vol % and 5.0 vol % lanthanum trioxide (La2O3) were irradiated with low-energy (200 eV) and high-flux (5.8â¯Ãâ¯1021 or 1.4â¯Ãâ¯1022 ions/m2â
s) He+ ions at elevated temperature. After He+ irradiation at a fluence of 3.0â¯Ãâ¯1025/m2, their surface damages were observed by scanning electron microscopy, energy dispersive spectroscopy, scanning electron microscopy-electron backscatter diffraction, and conductive atomic force microscopy. Micron-sized holes were formed on the surface of W alloys after He+ irradiation at 1100â¯K. Analysis shows that the La2O3 grains doped in W were sputtered preferentially by the high-flux He+ ions when compared with the W grains. For irradiation at 1550â¯K, W nano-fuzz was formed at the surfaces of both polycrystalline W and La2O3-doped W. The thickness of the fuzz layers formed at the surface of La2O3-doped W is 40% lower than the one of polycrystalline W. The presence of La2O3 could suppress the diffusion and coalescence of He atoms inside W, which plays an important role in the growth of nanostructures fuzz.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 501, 1 April 2018, Pages 275-281
Journal: Journal of Nuclear Materials - Volume 501, 1 April 2018, Pages 275-281
نویسندگان
Lu Liu, Shouzhe Li, Dongping Liu, Günther Benstetter, Yang Zhang, Yi Hong, Hongyu Fan, Weiyuan Ni, Qi Yang, Yunfeng Wu, Zhenhua Bi,