【摘要】 利用高真空非自耗电弧熔炼炉制备了V₈₅Ti₁₀Y₅和V₈₅Ti₁₀Cu₅氢分离合金。通过SEM、TEM、XRD、氢渗透试验、PCT吸氢试验、恒压缓冷试验，研究了Y、Cu元素的加入对合金氢渗透性能、氢溶解性能及抗氢脆性能的影响。结果表明：铸态V₈₅Ti₁₀Y₅和V₈₅Ti₁₀Cu₅合金组织均由V-基体和第二相组成，但前者第二相是弥散分布的富Y颗粒，而后者为既在晶内析出又沿晶界连续分布的铜钛金属间化合物。V₈₅Ti₁₀Y₅合金中Y2O3的生成及V₈₅Ti₁₀Cu₅合金中部分固溶Cu的斥氢作用和Cu₂Ti形成使V中Ti的固溶量减少，进而降低合金中的氢浓度，减小氢固溶产生的内应力，提高抗氢脆性能。V₈₅Ti₁₀Y₅和V₈₅Ti₁₀Cu₅合金在缓冷过程中均未发生氢脆现象，表现出优异的抗氢脆性能，而且在673K时的氢渗透率分别为0.139×10^-6和0.174×10^-6mol·H₂·m^-1·s-1·Pa^0.5，是Pd₇₇Ag₂₃氢渗透率的5.5和6.9倍，与商用钯合金相比均展现出较高的渗透率。更多还原

【Abstract】 Hydrogen separation alloys V₈₅Ti₁₀Y₅ and V₈₅Ti₁₀Cu₅ were prepared by high vacuum non-consumable arc melting furnace. The effects of the addition of Y and Cu elements on the hydrogen permeability, hydrogen solubility and hydrogen brittleness resistance of the alloy were investigated by SEM, TEM, XRD, hydrogen permeability test, PCT hydrogen absorption test and constant pressure slow cooling test. The results show that the as-cast V₈₅Ti₁₀Y₅ and V₈₅Ti₁₀Cu₅ alloys are both composed of V-matrix and the second phase, but the second phase of the former is dispersively distributed Y-rich particles, while the latter is a Cu-Ti intermetallic compound precipitated in the grain and distributed continuously along the grain boundary. The formation of Y2O3 in V₈₅Ti₁₀Y₅ alloy and the hydrogen-repulsive action of some solid solution Cu in V₈₅Ti₁₀Cu₅alloy and the formation of Cu2Ti reduce the solid solution amount of Ti in V, and then reduce the concentration of hydrogen in the alloy, reduce the internal stress generated by hydrogen solution, and thus improve the anti-hydrogen brittleness. The V₈₅Ti₁₀Y₅ and V₈₅Ti₁₀Cu₅ alloys show excellent anti-hydrogen embrittlement properties without hydrogen embrittlement during slow cooling. Moreover, the hydrogen permeability at 673 K is 0.139×10^-6 and 0.174×10^-6 mol·H₂·m^-1·s^-1·Pa^0.5, which is 5.5 and 6.9 times of that of Pd₇₇Ag₂₃, respectively. Compared with commercial palladium alloys, they all show higher permeability.更多还原