Cr含量对氢分离合金V90-xTi10Crx(x=0,5,10,20)组织和性能的影响

Effect of Cr content on microstructure and properties ofV90-xTi10Crx(x=0,5,10,20) hydrogen separation alloys

摘要:

单相V基合金膜具有比Pd合金膜更高的氢渗透率及较低的成本,在氢分离合金膜纯化领域有潜在的应用前景。本文通过增加Cr含量来探究斥氢元素Cr对单相V90-xTi10Crx(x=0,5,10,20)合金氢溶解、氢渗透以及抗氢脆能力的影响。结果表明,Cr含量的增加降低了氢在V90-xTi10Crx合金中的氢溶解度以及氢扩散系数,从而降低了氢渗透率,但V90-xTi10Crx合金仍表现出优于Pd及Pd-Ag合金的氢渗透性能。另一方面,随着Cr含量的增加,V90-xTi10Crx合金破裂温度从184℃(x=5at%)降低到141℃(x=10at%),而x=20at%时,合金膜冷至室温仍保持完整性,表现出优异的抗氢脆性能。

Abstract:

Single-phase V-based alloy membranes have potential applications in the field of hydrogen separation purification due to their higher hydrogen permeability and lower cost than Pd alloy membranes. The effect of Cr content on the hydrogen solubility and diffusivity, hydrogen permeability and hydrogen embrittlement resistance of single-phase V90-xTi10Crx(x=0,5,10,20) alloys has been investigated in this paper. The results show that the increase of Cr content decreases the hydrogen dissolution and hydrogen diffusion in V90-xTi10Crxalloy, thus decreasing the hydrogen permeability, but V90-xTi10Crx alloy still shows better hydrogen permeation performance than Pd and Pd-Ag alloys. Moreover, the fracture temperature of the V90-xTi10Crx alloy decreases from 184°C (x=5at%) to 141°C (x=10at%) with increasing Cr content, while x=20at% the membrane maintaines its integrity when air-cooling to room temperature, exhibiting excellent resistance to hydrogen embrittlement.