Effect of surface roughness on electron work function of AZ31 Mg alloy and their correlation
Effect of surface roughness on electron work function of AZ31 Mg alloy and their correlation
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表面粗糙度对AZ31镁合金电子逸出功的影响及其相关性
DOI：
10.1016/j.jallcom.2017.10.007
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发表时间：
2018
影响因子：
6.2
通讯作者：
Li Wen
中科院分区：
文献类型：
--
作者：
Xue Mingshan;Yao Yao;Ou Junfei;Wang Fajun;Qu Yao;Li Wen
表面几何构型对各种轻合金电子行为的影响具有基础性和现实意义。本文采用开尔文扫描探针和理论模拟相结合的方法，研究了表面粗糙度对AZ31镁合金电子功函数的影响。实验结果表明，表面粗糙度对EWF有重要影响，且EWF随表面粗糙度的增加而线性增加。这主要是由于粗糙表面附近局部静电场的变化限制了电子的运动和转移，导致EWF增大。基于微电容模型，合理地解释了EWF与表面粗糙度之间的线性关系，与实验数据吻合较好。
Effect of surface geometrical configurations on electronic behaviors of various light alloys are of both fundamental and practical significance. In this study, the effect of surface roughness on the electron work function (EWF) of AZ31 Mg alloys was investigated by scanning Kelvin probe and theoretical simulation. The experimental results indicated that the surface roughness had an important effect on the EWF, and the EWF was linearly increased with the increased roughness. It was mainly in that the change of the local electrostatic field near the rough surface confined the movement and transfer of the electrons, resulting in the increase of the EWF. Based on the microcapacitor model, the linear relationship between the EWF and the surface roughness was reasonably explained, which was well consistent with the experimental data.