Low temperature homogenization in nanocrystalline PdCu thin film system

G. Molnár, G. L. Katona, G. Langer, A. Csík, Y. C. Chen, D. Beke

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Diffusion and solid state reactions were investigated in Pd-Cu nanocrystalline films by means of secondary neutral mass spectrometry depth profiling technique. The heat treatments were made at low temperatures (where the volume diffusion was frozen in) for long enough annealing times to reach saturation. In the early stage there is a grain boundary interdiffusion. At longer times first a Pd plateau developed inside the Cu layer. Later on the Cu penetration was also more and more extended in the Pd, even the average composition of Cu in Pd became higher than the average Pd composition in Cu. Depending on the ratio of the initial thicknesses, the system (for thickness ratios corresponding to 50/50 Cu/Pd or to 75/25 Cu/Pd) arrived either at the mixture of pure Pd and β-CuPd phase or to the mixture of α'-Cu3Pd and β-CuPd phases, respectively, as dictated by the phase diagram. The process is interpreted as grain boundary diffusion induced solid state reaction.

Original languageEnglish
Article number105012
JournalMaterials Research Express
Volume2
Issue number10
DOIs
Publication statusPublished - Oct 1 2015

Fingerprint

Solid state reactions
Thin films
Grain boundaries
Interdiffusion (solids)
Depth profiling
Chemical analysis
Temperature
Phase diagrams
Mass spectrometry
Heat treatment
Annealing

Keywords

  • Diffusion
  • SNMS depth profile
  • Solid-state reaction
  • Thin film

ASJC Scopus subject areas

  • Biomaterials
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Polymers and Plastics
  • Surfaces, Coatings and Films

Cite this

Low temperature homogenization in nanocrystalline PdCu thin film system. / Molnár, G.; Katona, G. L.; Langer, G.; Csík, A.; Chen, Y. C.; Beke, D.

In: Materials Research Express, Vol. 2, No. 10, 105012, 01.10.2015.

Research output: Contribution to journalArticle

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AU - Katona, G. L.

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AU - Chen, Y. C.

AU - Beke, D.

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