کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7967765 1514194 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Helium defects interactions and mechanism of helium bubble growth in tungsten: A molecular dynamics simulation
ترجمه فارسی عنوان
تعاملات هلیم و مکانیزم رشد حباب هلیوم در تنگستن: شبیه سازی دینامیک مولکولی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
چکیده انگلیسی
Molecular dynamics simulations have been performed to investigate the interactions between helium (He) and defects in tungsten (W). The binding energy between He and He cluster is shown to be positive, which increases with increasing He cluster size. Both the W self-interstitial atoms (SIAs) and the vacancy can promote the He cluster formation. The binding energies of a He, a vacancy and an SIA W to a He-vacancy cluster (HenVm) in W are also investigated, which depend on the n/m ratio. According to these results, we propose the formation and growth mechanism of He bubbles, which involves the procedures of He-vacancy cluster formation, the capturing of vacancies, then He atoms, and vacancies again. The mechanism provides a good reference to understand the initial stage of the He bubble formation and growth in W.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 451, Issues 1–3, August 2014, Pages 356-360
نویسندگان
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