文献类型：期刊文献

英文题名：Molecular dynamics study on the origin of fuzz structure on tungsten surface

作者：Wang, Jinlong[1];Liu, Daping[1];Guo, Zhichao[1];He, Bingling[1];Dang, Wenqiang[2]

第一作者：王金龙

通讯作者：Wang, JL[1];Liu, DP[1]

机构：[1]Xinxiang Univ, Dept Phys, Xinxiang, Henan, Peoples R China;[2]Tianshui Normal Univ, Dept Phys, Tianshui, Peoples R China

第一机构：新乡学院物理与电子工程学院

通讯机构：[1]corresponding author), Xinxiang Univ, Dept Phys, Xinxiang, Henan, Peoples R China.|[110717]新乡学院物理与电子工程学院;[11071]新乡学院;

年份：2021

卷号：547

外文期刊名：JOURNAL OF NUCLEAR MATERIALS

收录：;EI(收录号：20210609890795);Scopus(收录号：2-s2.0-85100378541);WOS:【SCI-EXPANDED(收录号:WOS:000620249700010)】；

基金：This work was supported by the National Natural Science Foundation of China [grant number 11705157] and Henan Province Key Research Projects [grant number 17A140027]. We acknowledge support from the Henan Province Key Research Projects [grant number 21A43003] and University Innovation Fund Project of Gansu Province [grant number 2020A-097].

语种：英文

外文关键词：Helium cluster; Tungsten; Fuzz; Molecular dynamics simulation

摘要：Molecular dynamics was used to investigate the migration of He-V cluster and the irradiation of He on W(110) surface. Our research shows that the He-V complex can still move in the microsecond scale and tend to migrate to the surface. The formation of tungsten surface fuzz comes from two synergistic factors. On the one hand, the self-interstitial dislocation loop produced during the growth of helium bubbles annihilate at the surface and form adsorbed atoms, which leads to the formation of protrusions on the surface and increases the surface area; On the other hand, the enlarged surface attracts helium bubble and accelerates the coalescence and rupture of helium bubbles near the surface, resulting in formation of holes on the surface, further roughening and enlarging the surface. With the increase of irradiation fluence, the height of protrusions continues to increase, eventually forming fuzz. This formation mechanism is considered reasonable due to it can explain many experimental phenomena. (C) 2021 Elsevier B.V. All rights reserved.