Rapid Hydrogen Transportation Along Grain Boundary in Nickel

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	Rapid Hydrogen Transportation Along Grain Boundary in Nickel
	Y. L. Wang; L. Y. Xiong; S. Liu
	2014
发表期刊	Acta Metallurgica Sinica-English Letters
ISSN	1006-7191
卷号	27 期号:4 页码:615-620
摘要	The permeability and diffusivity of hydrogen in directionally solidified polycrystalline and single crystal nickel foils were measured by gas permeation method. The results showed that both hydrogen diffusivity and permeability were higher in directionally solidified nickel specimen than those in single crystal one at the temperature ranging from 300 to 480 degrees C, and confirmed the existence of short-circuit diffusion along the grain boundaries (GBs) in the directionally solidified nickel. The results suggested that the rapid diffusion along GBs was more obviously characterized in terms of higher permeability rather than higher diffusivity. The contribution of grain boundary to hydrogen transportation was represented by the differences of diffusivity (and permeability) in single crystal nickel and directionally solidified nickel. By modifying the Fick's first diffusion law and counting the grain boundary density, the hydrogen diffusivity and permeability of rapid diffusion along GBs were calculated. The results suggested both the diffusivity and permeability fit the Arrhenius relationship well at different temperature.
部门归属	[wang, yongli ; xiong, liangyin ; liu, shi] chinese acad sci, inst met res, dept special environm mat, shenyang 110016, peoples r china. ; liu, s (reprint author), chinese acad sci, inst met res, dept special environm mat, shenyang 110016, peoples r china. ; sliu@imr.ac.cn
关键词	Hydrogen Trapping Hydrogen Embrittlement Grain Boundary Diffusion Nickel Diffusion Fracture Alloys
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73433
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. L. Wang,L. Y. Xiong,S. Liu. Rapid Hydrogen Transportation Along Grain Boundary in Nickel[J]. Acta Metallurgica Sinica-English Letters,2014,27(4):615-620.
APA	Y. L. Wang,L. Y. Xiong,&S. Liu.(2014).Rapid Hydrogen Transportation Along Grain Boundary in Nickel.Acta Metallurgica Sinica-English Letters,27(4),615-620.
MLA	Y. L. Wang,et al."Rapid Hydrogen Transportation Along Grain Boundary in Nickel".Acta Metallurgica Sinica-English Letters 27.4(2014):615-620.