Ab initio study of interaction of helium with edge and screw dislocations in tungsten

详细信息    查看全文

• 作者：Alexander Bakaev^a ; ^b ; ^c ; ^{bakaev_vic@mail.ru} ; Dmitry Terentyev^a ; Petr Grigorev^a ; ^b ; ^d ; Matthias Posselt^c ; Evgeny E. Zhurkin^b
• 关键词：Dislocations ; Helium ; Tungsten ; Ab initio
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：393
• 期：Complete
• 页码：150-154
• 全文大小：585 K
• 卷排序：393

文摘

Both screw (SD) and edge dislocations (ED) offer trapping sites for He in tungsten. He atom is attracted to SD and ED with the interaction energy of ~1.3 and ~3.0 eV, respectively. The attraction of He to dislocations can contribute to the nucleation of He clusters at high T.