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Temperature Dependence of the Elastic Modulus of (Ni 0.6 Nb 0.4 ) 1−x Zr x Membranes: Effects of Thermal Treatments and Hydrogenation

Author

Listed:
  • Oriele Palumbo

    (CNR-ISC, U.O.S. La Sapienza, Piazzale A. Moro 5, 00185 Roma, Italy)

  • Sergio Brutti

    (CNR-ISC, U.O.S. La Sapienza, Piazzale A. Moro 5, 00185 Roma, Italy
    Department of Science, University of Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy)

  • Francesco Trequattrini

    (Department of Physics, Sapienza University of Rome, Piazzale A. Moro 5, 00185 Roma, Italy)

  • Suchismita Sarker

    (Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557, USA)

  • Michael Dolan

    (CSIRO Energy Technology, Pullenvale, Queensland 4069, Australia)

  • Dhanesh Chandra

    (Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557, USA)

  • Annalisa Paolone

    (CNR-ISC, U.O.S. La Sapienza, Piazzale A. Moro 5, 00185 Roma, Italy)

Abstract

Amorphous (Ni 0.6 Nb 0.4 ) 1−x Zr x membranes were investigated by means of X-ray diffraction, thermogravimetry, differential thermal analysis and tensile modulus measurements. Crystallization occurs only above 673 K, and even after hydrogenation the membranes retain their mainly amorphous nature. However, after exposure to gaseous hydrogen, the temperature dependence of the tensile modulus, M, displays large variations. The modulus of the hydrogen reacted membrane is higher with respect to the pristine samples in the temperature range between 298 K and 423 K. Moreover, a sharp drop in M is observed upon heating to approximately 473 K, well below the glass transition temperature of these glasses. We propose that the changes in the moduli as a function of temperature on the hydrogenated samples are due to the formation of nanocrystalline phases of Zr hydrides in (Ni 0.6 Nb 0.4 ) 1−x Zr x -H membanes.

Suggested Citation

  • Oriele Palumbo & Sergio Brutti & Francesco Trequattrini & Suchismita Sarker & Michael Dolan & Dhanesh Chandra & Annalisa Paolone, 2015. "Temperature Dependence of the Elastic Modulus of (Ni 0.6 Nb 0.4 ) 1−x Zr x Membranes: Effects of Thermal Treatments and Hydrogenation," Energies, MDPI, vol. 8(5), pages 1-11, May.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:5:p:3944-3954:d:49186
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    Cited by:

    1. Andrea Moriani & Oriele Palumbo & Silvano Tosti & Alessia Santucci & Alfonso Pozio & Francesco Trequattrini & Annalisa Paolone, 2019. "An Innovative Procedure to Evaluate the Hydrogen Diffusion Coefficient in Metals from Absorption Measurements," Energies, MDPI, vol. 12(9), pages 1-13, April.

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