Vanadium-based alloys are considered as candidate structural materials for nuclear fusion and fast nuclear reactors. Some properties of vanadium alloys are especially advantageous for nuclear fusion facilities, namely, a fast decay of induced activity, resistance to liquid lithium media and high-temperature strength. At the same time, V-alloys absorb and dissolve hydrogen isotopes in large quantities, and the mobility of dissolved hydrogen is high even at cryogenic temperatures. Thus, vanadium and its alloys, as some other metals of the fifth group (Nb, Ta), are characterized by high hydrogen permeability. This allows their usage as membranes for the diffusive purification of hydrogen isotopes. Under plasma irradiation of an inlet surface of such membranes, suprathermal hydrogen atoms and ions with quite high possibility penetrate through the adsorption barrier and diffusing inside materials bulk can reach an outlet surface. This paper aims to study the plasma-driven permeation (PDP) of deuterium through V–4Cr–4Ti alloy. It was shown that the permeation probability of deuterium under plasma irradiation for V–4Cr–4Ti alloy varies in a range of χ = 0.03 ÷ 0.12 for T = 600 ÷ 800 K, which leaves open the possibility of such alloys usage for hydrogen isotopes purification in the fusion reactor exhaust.

钒基合金被认为是核聚变和快速核反应堆的候选结构材料。钒合金的某些性能对于核聚变设施特别有利，即感应活性的快速衰减，对液态锂介质的抵抗力和高温强度。同时，钒合金大量吸收和溶解氢同位素，即使在低温下，溶解的氢的迁移率也很高。因此，钒及其合金，如第五族的其他一些金属（Nb，Ta），具有高的氢渗透性。这允许将它们用作氢同位素扩散纯化的膜。在这种膜的入口表面的等离子体照射下，超热氢原子和离子极有可能穿过吸附壁，并扩散到内部大量材料中，从而到达出口表面。本文旨在研究氘通过V–4Cr–4Ti合金的等离子体驱动的渗透（PDP）。结果表明，V-4Cr-4Ti合金在等离子辐射下氘的渗透概率在T = 600÷800 K的χ= 0.03÷0.12的范围内变化，这为此类合金用于氢同位素纯化提供了可能性在聚变反应堆排气中。