Desorption of hydrogen trapped in carbon and graphite

作者：Atsumi H^*; Takemura Y; Miyabe T; Konishi T; Tanabe T; Shikama T

来源：Journal of Nuclear Materials, 2013, 442(1-3): S746-S750.

DOI：10.1016/j.jnucmat.2013.03.041

Thermal desorption behavior of deuterium (D-2) from isotropic graphites and a carbon fiber carbon composite (CFC) charged with D-2 gas has been investigated to obtain information concerning hydrogen recycling and tritium inventory in fusion experimental devices as well as a futuristic fusion reactor. After thermal desorption experiments were conducted at temperatures up to 1740 K, a desorption peak at approximately 1600 K (peak 4) was discovered. This is in addition to the previously known peak at approximately 1300 K (peak 3). Peak 3 can be attributed to the release of deuterium controlled by the diffusion process in a graphite filler grain and peak 4 can be attributed to the detrapping of deuterium released from an interstitial cluster loop edge site. Activation energies of peaks 3 and 4 are estimated to be 3.48 and 6.93 eV, respectively.

• 出版日期2013-11