Physical properties of Zr50Cu40 - XAl 10Pdx bulk glassy alloys

M. Wencka, M. Jagodič, A. Gradišek, A. Kocjan, Z. Jagličič, P. J. McGuiness, T. Apih, Y. Yokoyama, J. Dolinšek

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

It was shown recently (Yokoyama et al. [9]) that the addition of a small amount of Pd to the Zr50Cu40Al10 bulk glassy alloy (BGA) has a beneficial effect on fatigue-strength enhancement, where the composition Zr50Cu37Al10Pd3 behaved in a resonant-like way by showing the highest fatigue limit of 1050 MPa and the minimum Vickers hardness. We performed a study of the magnetic properties, the specific heat, the electrical resistivity and the hydrogen-diffusion constant for a series of compositions Zr50Cu40 - xAl 10Pdx (x = 0-7 at.%), in order to determine their physical properties and to check for the influence of the Pd content on these properties. The Zr50Cu40 - xAl10Pdx BGAs are nonmagnetic, conducting alloys, where the Pauli spin susceptibility of the conduction electrons is the only source of paramagnetism. The low-temperature specific heat indicates an enhancement of the conduction-electron effective mass m* below 5 K, suggesting that the Zr50Cu40 - xAl10Pdx BGAs are not free-electron-like compounds. The electrical resistivities of the Zr 50Cu40 - xAl10Pdx BGAs amount to about 200 μΩ cm and show a small, negative temperature coefficient (NTC) with an increase from 300 to 2 K of 4%. The hydrogen self-diffusion constant D in hydrogen-loaded samples shows classical over-barrier-hopping temperature dependence and is of comparable magnitude to the related icosahedral and amorphous Zr69.5Cu12Ni11Al7.5 hydrogen-storage alloys. No correlation between the investigated physical parameters and the Pd content of the samples could be observed.

Original languageEnglish
Pages (from-to)16-21
Number of pages6
JournalJournal of Alloys and Compounds
Volume504
Issue number1
DOIs
Publication statusPublished - 2010 Aug 31

Keywords

  • Metallic glasses
  • Physical properties

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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    Wencka, M., Jagodič, M., Gradišek, A., Kocjan, A., Jagličič, Z., McGuiness, P. J., Apih, T., Yokoyama, Y., & Dolinšek, J. (2010). Physical properties of Zr50Cu40 - XAl 10Pdx bulk glassy alloys. Journal of Alloys and Compounds, 504(1), 16-21. https://doi.org/10.1016/j.jallcom.2010.05.092