Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1564973 | Journal of Nuclear Materials | 2014 | 5 Pages |
Abstract
Experiments concerning deuterium gas-driven permeation through rolled tungsten foils in the temperature range of 850-950 K and subsequent deuterium retention have been performed. The steady state permeation flux of deuterium is proportional to the square root of the driving pressure. The permeability of deuterium is in an order of 10â14 mol mâ1 sâ1 Paâ1/2 in this temperature range and the activation energy for permeation is 1.21 eV. Measurements of diffusivity are significantly affected by the driving pressure, which can be well explained by a saturable-trap model. Thermal desorption spectra of samples feature a single deuterium release peak at about 873 K. TMAP 4 modeling of this peak gives a detrapping energy of 1.70 eV, which fits the dissociation enthalpy of deuterium desorbing from the inner wall of vacancy clusters or pores in tungsten.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Feng Liu, Haishan Zhou, Xiao-Chun Li, Yuping Xu, Zhongqing An, Hongmin Mao, Wenjing Xing, Qing Hou, Guang-Nan Luo,