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Title: Hydrogen absorption properties of amorphous (Ni 0.6Nb 0.4-yTa y ) 100-x Zr x membranes

Abstract

Ni based amorphous materials have great potential as hydrogen purification membranes. In the present work the melt spun (Ni 0.6Nb 0.4-yTa y) 100-xZr x with y=0, 0.1 and x=20, 30 was studied. Our result of X-ray diffraction spectra of the ribbons showed an amorphous nature of the alloys. Heating these ribbons below T < 400 °C, even in a hydrogen atmosphere (1-10 bar), the amorphous structure was retained. Furthermore, the crystallization process was characterized by differential thermal analysis and the activation energy of such process was obtained. The hydrogen absorption properties of the samples in their amorphous state were studied by the volumetric method, and the results showed that the addition of Ta did not significantly influence the absorption properties, a clear change of the hydrogen solubility was observed with the variation of the Zr content. The values of the hydrogenation enthalpy changed from ~37 kJ/mol for x=30 to ~9 kJ/mol for x=20. Our analysis of the volumetric data provides the indications about the hydrogen occupation sites during hydrogenation, suggesting that at the beginning of the absorption process the deepest energy levels are occupied, while only shallower energy levels are available at higher hydrogen content, with the available interstitial sitesmore » forming a continuum of energy levels.« less

Authors:
 [1];  [2];  [3];  [3];  [3];  [3];  [4];  [5];  [1]
  1. National Center for Research, Rome (Italy). Inst. for Complex System (CNR-ISC)
  2. National Center for Research, Rome (Italy). Inst. for Complex System (CNR-ISC); Univ. of Rome (Italy). Dept. of Physics
  3. Univ. of Nevada, Reno, NV (United States). Dept. of Chemical and Materials Engineering
  4. Univ. of Vermont, Burlington, VT (United States). Dept. of Chemistry
  5. Commonwealth Scientific and Industrial Research Organisation (CSIRO), Pullenvale (Australia). Queensland Center for Advanced Technologies (QCAT)
Publication Date:
Research Org.:
Univ. of Nevada, Reno, NV (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1389663
Alternate Identifier(s):
OSTI ID: 1356173; OSTI ID: 1360809
Grant/Contract Number:
NA0002004; US DE-NA0002004
Resource Type:
Journal Article: Published Article
Journal Name:
Progress in Natural Science
Additional Journal Information:
Journal Volume: 27; Journal Issue: 1; Journal ID: ISSN 1002-0071
Publisher:
Chinese Materials Research Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Amorphous Ni based alloy ribbons; High temperature X-ray diffraction; DTA; Activation energy; Crystallization temperature; Hydrogen solubility; High temperature X-ray; diffraction; Crystallization temperature Hydrogen solubility

Citation Formats

Palumbo, O., Trequattrini, F., Pal, N., Hulyalkar, M., Sarker, S., Chandra, D., Flanagan, T., Dolan, M., and Paolone, A. Hydrogen absorption properties of amorphous (Ni0.6Nb0.4-yTay ) 100-x Zr x membranes. United States: N. p., 2017. Web. doi:10.1016/j.pnsc.2017.01.002.
Palumbo, O., Trequattrini, F., Pal, N., Hulyalkar, M., Sarker, S., Chandra, D., Flanagan, T., Dolan, M., & Paolone, A. Hydrogen absorption properties of amorphous (Ni0.6Nb0.4-yTay ) 100-x Zr x membranes. United States. doi:10.1016/j.pnsc.2017.01.002.
Palumbo, O., Trequattrini, F., Pal, N., Hulyalkar, M., Sarker, S., Chandra, D., Flanagan, T., Dolan, M., and Paolone, A. Wed . "Hydrogen absorption properties of amorphous (Ni0.6Nb0.4-yTay ) 100-x Zr x membranes". United States. doi:10.1016/j.pnsc.2017.01.002.
@article{osti_1389663,
title = {Hydrogen absorption properties of amorphous (Ni0.6Nb0.4-yTay ) 100-x Zr x membranes},
author = {Palumbo, O. and Trequattrini, F. and Pal, N. and Hulyalkar, M. and Sarker, S. and Chandra, D. and Flanagan, T. and Dolan, M. and Paolone, A.},
abstractNote = {Ni based amorphous materials have great potential as hydrogen purification membranes. In the present work the melt spun (Ni0.6Nb0.4-yTay)100-xZrx with y=0, 0.1 and x=20, 30 was studied. Our result of X-ray diffraction spectra of the ribbons showed an amorphous nature of the alloys. Heating these ribbons below T < 400 °C, even in a hydrogen atmosphere (1-10 bar), the amorphous structure was retained. Furthermore, the crystallization process was characterized by differential thermal analysis and the activation energy of such process was obtained. The hydrogen absorption properties of the samples in their amorphous state were studied by the volumetric method, and the results showed that the addition of Ta did not significantly influence the absorption properties, a clear change of the hydrogen solubility was observed with the variation of the Zr content. The values of the hydrogenation enthalpy changed from ~37 kJ/mol for x=30 to ~9 kJ/mol for x=20. Our analysis of the volumetric data provides the indications about the hydrogen occupation sites during hydrogenation, suggesting that at the beginning of the absorption process the deepest energy levels are occupied, while only shallower energy levels are available at higher hydrogen content, with the available interstitial sites forming a continuum of energy levels.},
doi = {10.1016/j.pnsc.2017.01.002},
journal = {Progress in Natural Science},
number = 1,
volume = 27,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.pnsc.2017.01.002

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  • Ni based amorphous materials have great potential as hydrogen purification membranes. In the present work the melt spun (Ni 0.6Nb 0.4-yTa y) 100-xZr x with y=0, 0.1 and x=20, 30 was studied. Our result of X-ray diffraction spectra of the ribbons showed an amorphous nature of the alloys. Heating these ribbons below T < 400 °C, even in a hydrogen atmosphere (1-10 bar), the amorphous structure was retained. Furthermore, the crystallization process was characterized by differential thermal analysis and the activation energy of such process was obtained. The hydrogen absorption properties of the samples in their amorphous state were studiedmore » by the volumetric method, and the results showed that the addition of Ta did not significantly influence the absorption properties, a clear change of the hydrogen solubility was observed with the variation of the Zr content. The values of the hydrogenation enthalpy changed from ~37 kJ/mol for x=30 to ~9 kJ/mol for x=20. Our analysis of the volumetric data provides the indications about the hydrogen occupation sites during hydrogenation, suggesting that at the beginning of the absorption process the deepest energy levels are occupied, while only shallower energy levels are available at higher hydrogen content, with the available interstitial sites forming a continuum of energy levels.« less
  • Ni based amorphous materials have great potential as hydrogen purification membranes. In the present work the melt spun (Ni 0.6Nb 0.4-yTa y) 100-xZr x with y=0, 0.1 and x=20, 30 was studied. Our result of X-ray diffraction spectra of the ribbons showed an amorphous nature of the alloys. Heating these ribbons below T < 400 °C, even in a hydrogen atmosphere (1-10 bar), the amorphous structure was retained. Furthermore, the crystallization process was characterized by differential thermal analysis and the activation energy of such process was obtained. The hydrogen absorption properties of the samples in their amorphous state were studiedmore » by the volumetric method, and the results showed that the addition of Ta did not significantly influence the absorption properties, a clear change of the hydrogen solubility was observed with the variation of the Zr content. The values of the hydrogenation enthalpy changed from ~37 kJ/mol for x=30 to ~9 kJ/mol for x=20. Our analysis of the volumetric data provides the indications about the hydrogen occupation sites during hydrogenation, suggesting that at the beginning of the absorption process the deepest energy levels are occupied, while only shallower energy levels are available at higher hydrogen content, with the available interstitial sites forming a continuum of energy levels.« less
  • Effects of crystallization behavior on the mechanical properties of Zr{sub 56.7}Cu{sub 15.3}Ni{sub 12.5}Nb{sub 5.0}Al{sub 10.0}Y{sub 0.5} based bulk amorphous alloy (BAA) were studied. Differential scanning calorimetry (DSC) in Ar environment showed three-exothermic peaks at 395, 472 and 659.5 C and one-endothermic peak at 852 C. Following DSC study, as received BAA samples were heat-treated in vacuum at six different temperatures 300, 450, 600, 700, 800 and 850 C. Heat-treated samples were characterized using Vickers microhardness, X-ray diffraction (XRD), differential scanning calorimetry and field emission scanning electron microscopy (FESEM) to study crystallization behavior. It is found that samples heat-treated above themore » second (472 C) and third (659.5 C) exothermic peaks show high microhardness values compared to the as processed samples, and brittle cracking along the indent diagonal. As processed samples show clear evidence of shear banding. FESEM examination revealed existence of nano-scale precipitates for samples heat-treated at 600 and 700 C, while micro-scale precipitates for 850 C samples. Quasi-static compression tests showed compressive strain to failure decrease with heat-treated samples compared to as received ones. Fracture morphology of the compression test samples changes from vein pattern for as received to flat facets with multiple cracks for heat-treated samples. Indentation fracture toughness values decrease almost an order of magnitude for heat-treated samples compared to as received samples.« less
  • Fe-Ni based metal amorphous nanocomposites (MANCs) are investigated in the pseudo-binary alloys (Fe 100–xNi x) 80Nb 4Si 2B 14. To optimize the soft magnetic properties of the nanocomposites, primary and secondary crystallization kinetics must be understood. As such, primary and secondary crystallization temperatures are determined by differential scanning calorimetry, and activation energies are calculated, along with the resulting crystalline phases. Time-temperature-transformation diagrams for primary and secondary crystallization in (Fe 70Ni 30) 80Nb 4Si 2B 14 are presented. Saturation magnetization and Curie temperature are determined. In conclusion, the shape of magnetization vs. time curves for (Fe 30Ni 70) 80Nb 4Si 2Bmore » 14 at various temperatures suggest that the secondary crystal product often consumes some of the primary crystalline product.« less