New helium bubble growth mode at a symmetric grain-boundary in tungsten: accelerated molecular dynamics study

X.-Y. Liu; B. P. Uberuaga; D. Perez; A. F. Voter

doi:10.1080/21663831.2018.1494637

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New helium bubble growth mode at a symmetric grain-boundary in tungsten: accelerated molecular dynamics study

Original Report | 更新时间：2026-08-19

- New helium bubble growth mode at a symmetric grain-boundary in tungsten: accelerated molecular dynamics study
- Materials Research Letters Vol. 6, Issue 9, Pages: 522-530(2018)
- 作者机构：
  
  1. Materials Science and Technology Division Los Alamos National Laboratory Los Alamos
  2. Theoretical Division Los Alamos National Laboratory Los Alamos
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2018.1494637
  CLC：
- Online First：07 July 2018，
  
  Published：2018
- 稿件说明：
移动端阅览
X.-Y. Liu, B. P. Uberuaga, D. Perez, et al. New helium bubble growth mode at a symmetric grain-boundary in tungsten: accelerated molecular dynamics study[J]. Materials Research Letters, 2018, 6(9): 522-530.
DOI：

X.-Y. Liu, B. P. Uberuaga, D. Perez, et al. New helium bubble growth mode at a symmetric grain-boundary in tungsten: accelerated molecular dynamics study[J]. Materials Research Letters, 2018, 6(9): 522-530. DOI： 10.1080/21663831.2018.1494637.

摘要

Abstract

BSTRACTThis work

with an emphasis on helium irradiation rates appropriate for fusion-plasma conditions

advances the understanding of helium evolution at grain boundaries in W

an important consideration in the understanding of W as a plasma-facing component. Using accelerated molecular dynamics

helium bubble nucleation and growth at a symmetric Σ5[100](310) tilt grain-boundary in W is studied. The simulations reveal that the growth mode associated with bubble growth at the grain-boundary leads to a suppression of the helium supply to the bubble and hence to arrested growth. Such an unconventional bubble growth mode may dominate in materials with a high density of sinks.

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