Effects of Hydrogen on the Mechanical Properties of Ti&lt;SUB&gt;50&lt;/SUB&gt;Ni&lt;SUB&gt;25&lt;/SUB&gt;Cu&lt;SUB&gt;25&lt;/SUB&gt; Metallic Glass

Yamaura, Shin Ichi; Hasegawa, Masashi; Kimura, Hisamichi; Inoue, Akihisa

doi:10.2320/matertrans.43.2543

Cited by 33 publications

(14 citation statements)

References 27 publications

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“…5b shows the variation of the fracture strength of the alloys with the hydrogen content. The fracture strength for both alloys decreased as the hydrogen content increased, indicating a deteriorating effect of the hydrogen on the mechanical integrity, as reported for various hydrogenated Ti-and Zr-based amorphous ribbons [13,14,25,26]. Under uniaxial loading, the as-spun and hydrogenated low-Zr alloy ribbons exhibit superior strength in comparison to that of the high-Zr alloy composition.…”

Section: Resultsmentioning

confidence: 59%

Hydrogenation properties of Ni-Nb-Zr–Ta amorphous ribbons

et al. 2010

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Section: Resultsmentioning

confidence: 59%

Hydrogenation properties of Ni-Nb-Zr–Ta amorphous ribbons

et al. 2010

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“…The halo peak shifted to the lower angle with increasing hydrogen content, indicating that the volume expansion occurs as shown in the other amorphous alloys. 6,10,11) It should be noted that the morphology of the amorphous ribbons was changed after electrolytic hydrogenation. Figure 2 shows a change in the outer appearance of the hydrogenated (Ni 0:6 Nb 0:4 ) 70 Zr 30 alloy ribbon (hydrogen content of about 15 at%) stored in air at room temperature for various periods of time.…”

Section: Methodsmentioning

confidence: 99%

Mechanical Properties of Melt-Spun Amorphous Ni-Nb-Zr Alloys after Hydrogen Charging

et al. 2006

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The effect of pre-charged hydrogen on the mechanical behavior of melt-spun amorphous Ni-Nb-Zr alloys was investigated. A substantial increase in the tensile fracture strength is observed even in hydrogen content up to about 46 at%. The Vickers hardness gradually increases with an increase in hydrogen content up to about 27 at%, and keeps almost the same value in the higher content more than 46 at%. It might be said that the amorphous (Ni 0:6 Nb 0:4 ) 70 Zr 30 alloy is not embrittled distinctly even in the high hydrogen content at room temperature. The amorphous alloy ribbons always curled during hydrogenation and the outer side of the curled ribbon corresponds to the roll side due to preferential absorption of hydrogen. XPS study revealed that the zirconium content in the surface film of the roll side surface is lower than that of the top side surface. The difference in surface composition as well as higher surface roughness of the roll side surface seems responsible for the preferential hydrogen absorption.

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“…24) In order to employ these characteristic properties of amorphous alloys in the development of new hydrogen permeable membranes, [25][26][27][28] Sakaguchi et al and Adachi et al studied hydrogen permeability and hydrogen embrittlement of amorphous thin films of LaNi 5 hydrogen storage alloy. 29,30) Moreover, Hara et al studied hydrogen permeability and embrittlement of melt-spun amorphous Ni-Zr and Ni-M-Zr (M = Ti and Hf) alloys and reported that these alloys had enough mechanical strength without suffering from embrittlement although those hydrogen permeability was much lower than that of the Pd-Ag alloys.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Permeation Characteristics of Melt-Spun Ni-Nb-Zr Amorphous Alloy Membranes

et al. 2003

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We prepared the melt-spun (Ni 0:6 Nb 0:4 ) 100Àx Zr x (x ¼ 0 to 40 at%) and other amorphous alloy membranes and examined the permeation of hydrogen through those alloy membranes. The interatomic spacing in the Ni-Nb-Zr amorphous structure increased with increasing Zr content. The crystallization temperature of the Ni-Nb-Zr amorphous alloys decreased with increasing Zr content. The hydrogen flow increased with an increase of the temperature or the difference in the square-roots of hydrogen pressures across the membrane, Á ffiffiffi p p . At relatively higher temperature up to 673 K or at relatively higher hydrogen pressure difference, Á ffiffiffi p p up to 550 Pa 1=2 , the hydrogen flow was more strictly proportional to Á ffiffiffi p p . This indicates that the diffusion of hydrogen through the membrane is a rate-controlling factor for hydrogen permeation.The permeability of the Ni-Nb-Zr amorphous alloys was strongly dependent on alloy compositions and increased with increasing Zr content. However, it was difficult to investigate the hydrogen permeability of the (Ni 0:6 Nb 0:4 ) 60 Zr 40 amorphous alloy in this work due to the embrittlement during the measurement. The maximum hydrogen permeability was 1:3 Â 10 À8 (molÁm À1 Ás À1 ÁPa À1=2 ) at 673 K for the (Ni 0:6 Nb 0:4 ) 70 Zr 30 amorphous alloy. It is noticed that the hydrogen permeability of the (Ni 0:6 Nb 0:4 ) 70 Zr 30 amorphous alloy is higher than that of pure Pd metal. These permeation characteristics indicate the possibility of future practical use of the melt-spun amorphous alloys as a hydrogen permeable membrane.

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Effects of Hydrogen on the Mechanical Properties of Ti<SUB>50</SUB>Ni<SUB>25</SUB>Cu<SUB>25</SUB> Metallic Glass

Cited by 33 publications

References 27 publications

Hydrogenation properties of Ni-Nb-Zr–Ta amorphous ribbons

Hydrogenation properties of Ni-Nb-Zr–Ta amorphous ribbons

Mechanical Properties of Melt-Spun Amorphous Ni-Nb-Zr Alloys after Hydrogen Charging

Hydrogen Permeation Characteristics of Melt-Spun Ni-Nb-Zr Amorphous Alloy Membranes

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