کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7957666 | 1513864 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evolution of helium bubbles below different tungsten surfaces under neutron irradiation and non-irradiation conditions
ترجمه فارسی عنوان
تکامل حباب های هلیوم زیر سطوح مختلف تنگستن تحت اشعه نوترون و شرایط غیر اشعه
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کلمات کلیدی
او حباب، اثر تابش، تنگستن، شبیه سازی دینامیک مولکولی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مکانیک محاسباتی
چکیده انگلیسی
Studies of the evolution of embedded helium (He) bubbles in tungsten are very important for understanding the failure mechanism of tungsten as a plasma-facing material. In this work, the processes of He bubble evolution under neutron irradiation and non-irradiation conditions have been investigated by molecular dynamics simulations. The influences of temperature, helium/vacancy ratio, and surface crystal orientations on the stability and evolution of He bubbles were discussed. Four evolution cases (standing, expanding, bursting, and oversaturation expanding) of He bubbles under {1â¯0â¯0}, {1â¯1â¯0}, and {1â¯1â¯1} surfaces were found, and the oversaturation expanding case was discussed in detail. In particular, the differences between the stable bubbles bursting from {1â¯0â¯0}, {1â¯1â¯0}, and {1â¯1â¯1} surfaces under neutron irradiation condition were investigated. It was also found that He bubbles can burst from the surfaces (especially from a surface with low crystal face density) more easily under neutron irradiation condition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 148, 1 June 2018, Pages 242-248
Journal: Computational Materials Science - Volume 148, 1 June 2018, Pages 242-248
نویسندگان
Guo Wei, Feng Ren, Wenjing Qin, Wangyu Hu, Huiqiu Deng, Changzhong Jiang,