Hydrogen permeation and diffusion in beryllium
- Osaka Univ. (Japan)
- Nagoya Univ. (Japan)
A precise hydrogen permeation experiment for beryllium was conducted at a temperature ranging from 735 to 1000 K under hydrogen gas pressure of 10{sup 1} to 10{sup 3} Pa. Diffusion coefficient and permeation coefficient were determined from the steady state permeation and time transient permeation independently. The steady state permeation rate was proportional to the square root of H{sub 2} pressure and the time sequence of permeation rate agreed well with theoretical one, indicating that the permeation controlled by bulk diffusion. The temperature dependencies of the permeation coefficients ({Phi}) and diffusion coefficients (D) were respectively, {Phi}=(1.0{+-}0.1)x10{sup -6} exp[-73{+-}20(kJ/mol)/RT] (mol.m{sup -1}.s{sup -1}.Pa{sup -1/2}), D=(1.3{+-}0.1)x10{sup -7} exp[-59{+-}20(kJ/mol)/RT] (m{sup 2}.s{sup -1}). Solubility calculated from the relation {Phi}=DS was S=7.1exp[-14(kJ/mol)/RT] (mol.m{sup -3}.Pa{sup -1/2}). 12 refs., 7 figs., 1 tab.
- OSTI ID:
- 196768
- Report Number(s):
- CONF-950506-; ISSN 0748-1896; TRN: 96:001398-110
- Journal Information:
- Fusion Technology, Vol. 28, Issue 3 pt 2; Conference: 5. topical meeting on tritium technology in fission, fusion and isotopic applications, Ispra (Italy), 28 May - 3 Jun 1995; Other Information: PBD: Oct 1995
- Country of Publication:
- United States
- Language:
- English
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