Experimental study on the diffusion of hydrogen along individual grain boundaries in nickel

被引：34

作者：

Ma, Z. X. ^{[2
]}

Xiong, X. L. ^{[2
]}

Zhang, L. N. ^{[2
]}

Zhang, Z. H. ^{[3
]}

Yan, Y. ^{[2
]}

Su, Y. J. ^{[1
,2
]}

机构：

[1] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Corros & Protect Ctr, Key Lab Environm Fracture MOE, Beijing 100083, Peoples R China

[3] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2018年 / 92卷

基金：

中国国家自然科学基金;

关键词：

Grain boundary; Hydrogen diffusion; Scanning Kelvin probe force microscopy; SCANNING KELVIN PROBE; FORCE MICROSCOPY; DEFORMATION TWINS; STAINLESS-STEEL; PERMEATION; PALLADIUM; MECHANISM; EVOLUTION; HYDRIDE; SURFACE;

D O I：

10.1016/j.elecom.2018.05.012

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Whether hydrogen diffusion can be accelerated by grain boundaries (GBs) still remains controversial. In this study, the impact of different types of GBs within the directionally solidified polycrystalline nickel specimens on hydrogen diffusion was directly observed at room temperature by combining Electron Back Scattered Diffraction (EBSD) and scanning Kelvin probe force microscopy (SKPFM). The results suggest that the coherent Sigma 3 twin GB provides a fast path for hydrogen diffusion, while the random GB cannot significantly accelerate the transport of hydrogen atoms. In addition, this study confirms that SKPFM is a reliable technique to allow the detection of the local diffusion and distribution of hydrogen in metals with high lateral resolution down to the GBs.

引用

页码：24 / 28

页数：5

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