کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7964888 1514179 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anti-radiation mechanisms in nanoporous gold studied via molecular dynamics simulations
ترجمه فارسی عنوان
مکانیسم ضد تابش در طلا نانو پوزش از طریق شبیه سازی دینامیک مولکولی بررسی شده است
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
چکیده انگلیسی
The radiation resistance performance of nanoporous (NP) gold is investigated by cascade simulations of a gold nanowire using molecular dynamics. The role of the surface on primary defect production was clarified: the mean size of the vacancy clusters (VCs) near the surface in the nanowire becomes larger compared to that of a single crystal. In the surface region, the reduction of the formation and migration energies of point defects leads to a continuous flux of point defects towards the free surface, which retards the formation and growth of defect clusters, resulting in a good anti-radiation performance. In the cascade region, however, the retained vacancies tend to form larger sessile VCs due to their low migration energies and large attractive forces, resulting in radiation damage. The competition between these two factors determines the anti-radiation behavior of NP gold.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 466, November 2015, Pages 328-333
نویسندگان
, , , , ,