Hydrogen permeation characteristics of melt-spun Zr60Al15Co2.5Ni7.5Cu15 glassy alloy membrane

Microstructure and hydrogen permeation of cold rolled and annealed Nb40Ti30Ni30 alloy

“…It is known that 5A group metals such as V, Nb and Ta show 10-100 times higher F than that of pure Pd at 673 K [3], but these metals and their alloys suffer from the severe hydrogen embrittlement. Some researchers tried to suppress the hydrogen embrittlement of these metals by using some metallurgical methods, but nobody obtained sufficient success [4][5][6][7]. Recently, the present authors have succeeded in the development of the Nb-TiNi hydrogen permeation alloys showing the high F value comparable to that of the Pd-Ag alloys and being insusceptible to the hydrogen embrittlement [8,9].…”

Microstructure and hydrogen permeability in Nb–Ti–Co multiphase alloys

“…The first way to attain large J is to find out alloys having the high Φ value. It is well known that Φ values of 5A metals such as V, Nb and Ta are higher than that of Pd and Pd-Ag alloys [4], however these metals and their alloys suffer from the severe hydrogen embrittlement [5][6][7][8][9]. The second way to attain large J is to make a pressure difference large and to reduce the thickness of the membrane.…”

Hydrogen permeable Ta–Ti–Ni duplex phase alloys with high resistance to hydrogen embrittlement

“…However, since Pd is expensive and a rare natural resource, it is eagerly desired to develop low cost and high performance hydrogen permeation alloys other than Pd alloys [1][2][3][4][5]. Recently, Hashi et al have reported that the Nb-TiNi [6,7], the V-TiNi [8] and the Ta-TiNi alloys [8] show high hydrogen permeability Φ comparable to that of pure Pd at 673 K. According to Hashi et al, the Ta 53 Ti 28 Ni 19 alloy, which is the most Tarich alloys investigated by them, shows the highest Φ value of 1.66 × 10 −8 mol H 2 m −1 s −1 Pa −0.5 at 673 K [8].…”