Diffusion in PdCuNiP alloys from the amorphous to the liquid state

A. Griesche, Th Zumkley, M. P. Macht, Shinsuke Suzuki, G. Frohberg

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6 Citations (Scopus)

Abstract

Interdiffusion in molten PdCuNiP alloys above the melting temperature and impurity diffusion in Pd40Cu30Ni10P20 above and below the glass transition were investigated. For the interdiffusion measurements in the liquid alloys capillary methods were used in the temperature range from 973 to 1373K. Uphill diffusion was observed for Pd and P in the presence of chemical gradients of Cu and Ni, respectively. This result correlates with mixing enthalpies calculated for the partial ternary systems. The measured temperature dependence of the interdiffusion coefficients is in accordance with the prediction of the mode coupling theory (MCT).The temperature dependence of the impurity diffusion coefficients in the non-relaxed glass shows "non-linear" Arrhenius behaviour with a kink near the glass transition. After long time relaxation at temperatures well below the glass transition the coefficients follow an uniform Arrhenius dependence over the entire temperature range with reduced diffusion coefficients below the glass transition.

Original languageEnglish
Pages (from-to)285-287
Number of pages3
JournalMaterials Science and Engineering A
Volume375-377
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - 2004 Jul
Externally publishedYes

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Keywords

  • Interdiffusion
  • Metallic glass
  • Structural relaxation
  • Uphill diffusion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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