LaNi3.70Al0.75Mn0.55合金吸氚特性

Characteristics of tritium absorption behaviors of LaNi3.70Al0.75Mn0.55

摘要:

通过研究LaNi3.70Al0.75Mn0.55合金材料在室温下定容吸氚压力随时间的变化规律，分析LaNi3.70Al0.75Mn0.55合金吸氚的反应机制的影响规律。试验结果表明，氚压力在材料吸氚初始阶段下降迅速，在15s内吸氚T/M比可达到1.5 std.cc/g，吸氚速率最快能达到0.28 std.cc·g-1·s-1，最大吸氢速率发生在α+β相区。氚在合金表面的解离和化学吸附为吸氚初期的控速步骤，当T/M＞15 std.cc/g后，反应产生β相变，形成氚化物，吸氚过程为形核长大控速步骤。

Abstract:

The pressure of tritium gas vs. time curves of LaNi3.70Al0.75Mn0.55 alloy absorbing tritium in the constant volume condition at room temperature were studied. Mechanism of tritium absorption and their effect on the tritium absorption rate were analyzed. The results indicated that the pressure decreases rapidly in the initial stage of absorbing tritium, and the T/M can reach to 1.5 std.cc/g in 15 s, the highest tritium absorption rate reaches to 0.28 std.cc·g-1·s-1 maxed out at the α+β phase. The dissociation and chemical adsorption of tritium on the surface of the alloy are the speed control steps at the initial stage of tritium absorption. When the T/M > 15 std.cc/g, the reaction results in phase transition to form tritium compounds, the control steps of tritium absorption is nuclear growth.