| Autor: |
William R. Wampler, A.V. Markin, A.E. Gorodetsky, A.P. Zakharov, V.N. Chernikov, Barney Lee Doyle, S.L. Kanashenko |
| Rok vydání: |
1996 |
| Předmět: |
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| Zdroj: |
Journal of Nuclear Materials. :1207-1212 |
| ISSN: |
0022-3115 |
| DOI: |
10.1016/s0022-3115(96)00067-0 |
| Popis: |
The experimental data on sorption and solubility of hydrogen isotopes in graphite in a wide ranges of temperature and pressure are reviewed. The Langmuir type adsorption is proposed for the hydrogen -- graphites interaction with taking into account dangling sp{sup 2}{minus}bonds relaxation. Three kinds of traps are proposed: Carbon interstitial loops with the adsorption enthalpy of {minus}4.4 eV/H{sub 2} (Traps l); carbon network edge atoms with the adsorption enthalpy of {minus}2.3 eV/H{sub 2} (Traps 2): Basal planes adsorption sites with enthalpy of +2.43 eV/H{sub 2} (Traps 3). The sorption capacity of every kind of graphite could be described with its own unique set of traps. The number of potential sites for the ``true solubility`` (Traps 3) we assume as 1E+6 appm, or HC=l, but endothermic character of this solubility leads to negligible amount of inventory in comparison with Traps 1 and Traps 2. The irradiation with neutrons or carbon atoms increases the number of Traps 1 and Traps 2. At damage level of {approximately}1 dpa under room temperature irradiation the number of these traps was increased up to 1500 and 5000 appm respectively. Traps 1 and Traps 2 are stable under high temperature annealing. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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