Microstructure, Hydrogen Permeability and Dbtc of (V, Nb)-Ti-Co Quaternary Alloys

Yan, Erhu; Ge, Xiaoyu; Guo, Zhang; Bai, Jinwang; Ma, Dongshuai; Huang, Renjun; Cheng, Jian; Zou, Yongjin; Chu, Hailiang; Xu, Fen; Sun, Lixian

doi:10.2139/ssrn.4362674

Cited by 1 publication

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Notably, the permeability of these two membranes was ca. 4.2-6.1 × 10 −9 mol H 2 m −1 s −1 Pa −0.5 at 673K, which is significantly lower than that (1.1-1.6 × 10 −8 mol H 2 m −1 s −1 Pa −0.5 ) of V 30 Ti 35 Co 35 [36] and pure Pd [38]. Nevertheless, this is much higher than V 70 Al 30 previously reported by Nishimura et al [37].…”

Section: Resultsmentioning

confidence: 71%

“…4.05 mL min -1 , which is 6.7 times higher than that (0.6 mL min -1 ) of the counterpart, i.e., the plate-like V5(Ti65Fe35)95 membrane. In addition, the H2 flux of this tubular membrane is also higher than that of traditional Nb30Ti35Co35 or Pd sheet-like membrane [36,38] with a diameter of 12 mm under the same test conditions. Finally, we summarised the advantages of tubular alloy membranes compared to previously developed plate-like ones in the field [49][50][51][52][53][54].…”

Section: No Samples Hydrogen Permeability Hydrogen Solubility Hydroge...mentioning

confidence: 75%

“…In this case, only the hydrogen permeability of alloys #2 and #3 were successfully measured, and their results are shown in Figure 8. For comparison, homologous alloys such as V 30 Ti 35 Co 35 [36], V 70 Al 30 [37], and pure Pd [3,38] are also listed in the figure. Clearly, for any membrane, the two parameters of temperature and hydrogen permeability satisfy a linear relationship.…”

Section: Resultsmentioning

confidence: 99%

“…In this case, only the hydrogen permeability of alloys #2 and #3 were successfully measured, and their results are shown in Figure 8. For comparison, homologous alloys such as V30Ti35Co35 [36], To further analyse the reasons for the above changes in permeability, the PCT curves of the (Ti 65 Fe 35 ) 100−x V x alloys (#1-#6) were measured at 673 K, and the results are shown in Figure 9. For each alloy, as the pressure gradually increases, the hydrogen solubility continuously increases, Figure 9a.…”

Section: Resultsmentioning

confidence: 99%

“…On the contrary, when pressure is within the range of 0.1-0.4 MPa, the PCT curve does not comply with Sievert's law. After linear fitting, their relationship can be expressed as follows: [36], V 70 Al 30 [37], and pure Pd [3,38].…”

Section: Resultsmentioning

confidence: 99%

See 4 more Smart Citations

Phase Equilibria of the V-Ti-Fe System and Its Applications in the Design of Novel Hydrogen Permeable Alloys

Wang,

Jia,

Yan

et al. 2023

Membranes

View full text Add to dashboard Cite

The precise liquidus projection of the V-Ti-Fe system are crucial for designing high-performance hydrogen permeation alloys, but there are still many controversies in the research of this system. To this end, this article first uses the CALPHAD (CALculation of PHAse Diagrams) method to reconstruct the alloy phase diagram and compares and analyses existing experimental data, confirming that the newly constructed phase diagram in this article has good reliability and accuracy. Second, this obtained phase diagram was applied to the subsequent development process of hydrogen permeation alloys, and the (Ti65Fe35)100−xVx (x = 0, 2.5, 5, 10, 15, 25) alloys with dual-phase {bcc-(V, Ti) + TiFe} structure were successfully explored. In particular, the alloys with x values equal to 2.5 at.% and 5 at.% exhibit relatively high hydrogen permeability. Third, to further increase the H2 flux permeation through the alloys, a 500-mm-long tubular (Ti65Fe35)95V5 membrane for hydrogen permeation was prepared for the first time. Hydrogen permeation testing showed that this membrane had a very high H2 flux (4.06 mL min−1), which is ca. 6.7 times greater than the plate-like counterpart (0.61 mL min−1) under the same test conditions. This work not only indicates the reliability of the obtained V-Ti-Fe phase diagram in developing new hydrogen permeation alloys, but also demonstrates that preparing tubular membranes is one of the most important means of improving H2 flux.

show abstract

Section: Resultsmentioning

confidence: 71%

Section: No Samples Hydrogen Permeability Hydrogen Solubility Hydroge...mentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

“…In this case, only the hydrogen permeability of alloys #2 and #3 were successfully measured, and their results are shown in Figure 8. For comparison, homologous alloys such as V30Ti35Co35 [36], To further analyse the reasons for the above changes in permeability, the PCT curves of the (Ti 65 Fe 35 ) 100−x V x alloys (#1-#6) were measured at 673 K, and the results are shown in Figure 9. For each alloy, as the pressure gradually increases, the hydrogen solubility continuously increases, Figure 9a.…”

Section: Resultsmentioning

confidence: 99%