论文摘要
Size effect on thermodynamics and diffusion of deuterium in nano-sized vanadium（V） layers is studied. Critical temperature（Tc）for deuterium phase transition is found to decrease with the inverse thickness of V layers and the thermodynamic factor increases as V thickness decreases. These effects are related to the deuterium-deuterium（D-D） interaction change versus V thickness,which experimentally proves that the D-D interaction plays the main contribution to the previously observed V size effect on deuterium chemical diffusion coefficients（Dc）. The self-diffusion coefficients（Ds） are obtained through correcting Dc with the thermodynamic factors. It is found that the Ds are similar in 14 and 28 monolayers of V while slightly larger Ds are observed at high concentrations in 14 atomic layers. The weak site blocking effect in the interface is argued to be the main contribution to the observed size effect on Ds.
论文目录
文章来源
类型: 期刊论文
作者: Wen Huang,Martin Brischetto,Bj?rgvin Hj?rvarsson
来源: Science China(Physics,Mechanics & Astronomy) 2019年11期
年度: 2019
分类: 基础科学,工程科技Ⅰ辑
专业: 化学,材料科学
单位: State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University,Department of Physics and Astronomy, Uppsala University,Department of Materials Science and Engineering, University of Washington
基金: supported by Energimyndigheten and the Swedish Researc Council
分类号: O614.511;TB383.1
页码: 109-114
总页数: 6
文件大小: 623K
下载量: 5