Tritium Aging Effects in LaNi4.25Al0.75

Tritium desorption isotherms and helium release properties are reported for three different LaNi4.25Al0.75 samples having 11-1/2 and 13 years of tritium exposure, and are compared to earlier data from similar samples with less exposure. The isotherms show a complete loss of the typical plateau structure, and a decreasing absorption capacity. However, the capacity loss is not due to further increase in heel content. Helium breakout is shown to occur in one sample when the T content became low