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| Content Provider | Springer Nature Link |
|---|---|
| Author | Liu, Shi Xiong, Liangyin Wang, Yongli |
| Copyright Year | 2014 |
| Abstract | 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 °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. |
| Starting Page | 615 |
| Ending Page | 620 |
| Page Count | 6 |
| File Format | |
| ISSN | 10067191 |
| Journal | Acta Metallurgica Sinica (English Letters) |
| Volume Number | 27 |
| Issue Number | 4 |
| e-ISSN | 21941289 |
| Language | English |
| Publisher | The Chinese Society for Metals |
| Publisher Date | 2014-07-15 |
| Publisher Place | Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Spectroscopy/Spectrometry Grain boundary diffusion Tribology, Corrosion and Coatings Organometallic Chemistry Characterization and Evaluation of Materials Hydrogen trapping Nickel Metallic Materials Hydrogen embrittlement Nanotechnology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Industrial and Manufacturing Engineering Metals and Alloys |
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