Vacancy-Dependent Bulk and Surface Retention of Hydrogen Isotopes in Tungsten-A Molecular Dynamics Study

被引：2
作者：
Towell, Sophie [1 ]
Lavrentiev, Mikhail Yu [2 ]
Lozano-Perez, Sergio [1 ]
机构：
[1] Univ Oxford, Dept Mat, Oxford OX1 2JD, England
[2] United Kingdom Atomic Energy Author, Culham Campus, Abingdon OX14 3DB, Oxon, England
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 2024年 / 52卷 / 09期
关键词：
Bombardment; diffusion; hydrogen; retention; tungsten;
D O I：
10.1109/TPS.2024.3390420
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Tungsten, given its high heat and neutron resistance, is often the material of choice for plasma-facing components in nuclear fusion reactors. However, understanding and predicting the behavior of hydrogen isotopes (deuterium and tritium) within tungsten's lattice poses a significant challenge. The retention and diffusion of these isotopes, which are influenced by microstructural defects such as vacancies, can significantly impact the performance and safety of fusion devices. This article employs the Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) simulation package to analyze the behavior of hydrogen isotopes in tungsten lattices with varying vacancy densities. Simple relationships between penetration depth and energy and mass of hydrogen isotope, as well as between reflection/penetration ratio, are found. The effect of vacancies on isotope diffusion and retention in the material and the role of temperature in this process are investigated.
引用
收藏
页码：3662 / 3667
页数：6
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