Reversible and irreversible hydrogen absorption in Ni67-xCuxZr33 glasses monitored by in situ resistivity measurements

J. Garaguly, A. Lovas, A. Cziráki, M. Reybold, J. Takács, K. Wetzig

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The process of hydrogen absorption and desorption are investigated in Ni67-xCuxZr33 glassy alloys by in situ resistivity measurements. The cyclic charging and discharging process has been monitored by conventional DC method using a computer-controlled system, exposing the samples to hydrogen of 6 MPa pressure at 293, 328 and 373 K, respectively. Normalized resistivities as a function of charging and discharging times are compared for the first and repeated cycles. Separate samples, taken from specific points of cycling, were investigated by transmission electron microscopy (TEM) measurements. Hydrogen content (H/M ratio) was determined by weight measurements, and checked by gas chromatography, which is combined with an appropriate vacuum extraction and heating technique of the samples. A gradual hydrogen-induced phase separation could be detected on the samples by scanning transmission electron microscopy (STEM) with increasing number of the cycling.

Original languageEnglish
Pages (from-to)938-942
Number of pages5
JournalMaterials Science and Engineering A
Volume226-228
Publication statusPublished - Jun 15 1997

Fingerprint

Hydrogen
Glass
electrical resistivity
glass
hydrogen
cycles
charging
weight measurement
Transmission electron microscopy
transmission electron microscopy
Weighing
gas chromatography
Phase separation
Gas chromatography
Desorption
desorption
direct current
Vacuum
Heating
vacuum

Keywords

  • Hydrogen absorption
  • Metallic glasses
  • Phase separation
  • Transport properties

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Reversible and irreversible hydrogen absorption in Ni67-xCuxZr33 glasses monitored by in situ resistivity measurements. / Garaguly, J.; Lovas, A.; Cziráki, A.; Reybold, M.; Takács, J.; Wetzig, K.

In: Materials Science and Engineering A, Vol. 226-228, 15.06.1997, p. 938-942.

Research output: Contribution to journalArticle

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