Effect of ageing in air/corrosion on morphology and catalytic properties of Cu-based amorphous alloy ribbons

A. Szummer, M. Pisarek, M. Dolata, A. Molnar, M. Janik-Czachor, M. Varga, K. Sikorski

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Investigations of the surfaces of Cu-based amorphous alloy ribbons exposed to air at room temperature for various periods of time in a laboratory atmosphere (ageing in air/corrosion) are reported. Various methods of analysis like X-ray electron microanalysis, SEM, XRD, electrochemistry and surface analysis (AES), with various lateral resolutions and different information depth, were used. It was found for the Cu-Zr and Cu-Hf ribbons that the corrosion processes start on the wheel side of the ribbon, where the original surface oxide layer is defective. As a result of ageing and devitrification a multilayer of Cu/XO2 (X=Zr or Hf), encompassing of ∼ 10% of the ribbon thickness is formed. In contrast, the Cu-Ti alloy retains its metallic luster, with no distinct Cu segregation and morphological changes. The present investigations point to the role of oxidation/corrosion of the amorphous alloys in the initiation of the devitrification process and in the development of the resulting morphology. Catalytic tests revealed that only the Cu-Zr and Cu-Hf ribbons with a distinct segregation of Cu on the surface are catalytically active materials.

Original languageEnglish
Pages (from-to)15-28
Number of pages14
JournalMaterials Science Forum
Volume377
Publication statusPublished - 2001

Fingerprint

Amorphous alloys
ribbons
corrosion
Aging of materials
Corrosion
air
Air
Microanalysis
Electrochemistry
Oxides
crystallization
Wheels
luster
Multilayers
X rays
electrochemistry
Oxidation
Scanning electron microscopy
wheels
microanalysis

Keywords

  • AES
  • Ageing in air/corrosion
  • Amorphous alloys
  • Catalytic activity
  • Cu segregation
  • Cu-Hf
  • Cu-Ti
  • Cu-Zr
  • Devitrification
  • Electron x-ray microanalysis
  • SEM/EDS

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Szummer, A., Pisarek, M., Dolata, M., Molnar, A., Janik-Czachor, M., Varga, M., & Sikorski, K. (2001). Effect of ageing in air/corrosion on morphology and catalytic properties of Cu-based amorphous alloy ribbons. Materials Science Forum, 377, 15-28.

Effect of ageing in air/corrosion on morphology and catalytic properties of Cu-based amorphous alloy ribbons. / Szummer, A.; Pisarek, M.; Dolata, M.; Molnar, A.; Janik-Czachor, M.; Varga, M.; Sikorski, K.

In: Materials Science Forum, Vol. 377, 2001, p. 15-28.

Research output: Contribution to journalArticle

Szummer, A, Pisarek, M, Dolata, M, Molnar, A, Janik-Czachor, M, Varga, M & Sikorski, K 2001, 'Effect of ageing in air/corrosion on morphology and catalytic properties of Cu-based amorphous alloy ribbons', Materials Science Forum, vol. 377, pp. 15-28.
Szummer, A. ; Pisarek, M. ; Dolata, M. ; Molnar, A. ; Janik-Czachor, M. ; Varga, M. ; Sikorski, K. / Effect of ageing in air/corrosion on morphology and catalytic properties of Cu-based amorphous alloy ribbons. In: Materials Science Forum. 2001 ; Vol. 377. pp. 15-28.
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