PERMEATION BEHAVIOR OF DEUTERIUM IMPLANTED INTO ALUMINUM LITHIUM ALLOYS

Ion implantation driven permeation (IDP) behavior has been investigated for deuterium implanted with low energy (100-1800 eV) into aluminium-lithium alloys (Al-0.89wt.%Li and Al-2.22wt.%Li alloys) to simulate the behavior of tritium. The experimental results showed that the steady state IDP behavior for Al-Li alloys was divided into two temperature regions around 620 K for 0.89wt.%-Li alloy and 700 K for 2.22 wt.%-Li alloy. In the high temperature regions, the IDP fluxes through both alloys depended significantly on the temperature, while the IDP fluxes were almost constant in the low temperature regions. This fact would suggest that the change in the above temperature dependencies are attributed to the change of the chemical trap site in alloys, because the temperatures at the turning point of the temperature dependencies coincide with those at the phase transition from alpha to alpha + alpha phase.