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Pramana

, Volume 32, Issue 3, pp 289–297 | Cite as

On the formation of amorphous layers by interdiffusion in zirconium-copper system

  • K Bhanumurthy
  • G K Dey
  • S Banerjee
  • S K Khera
  • M K Asundi
Condensed Matter Physics

Abstract

Formation of amorphous phase by solid state reaction has been observed in bulk copper-zirconium couples. Transmission electron microscopy (TEM), Auger electron spectroscopy (AES) and differential scanning calorimetry (DSC) techniques have been employed to detect and study the amorphous phase. The experimental observations have been explained with a model, which considers the breakdown of the a-zirconium lattice due to the solute enrichment beyond a certain limit where the nucleation of the amorphous phase becomes thermodynamically possible. The present-experiments convincingly show that amorphous phase can form in bulk diffusion couples made from large-grained well-annealed material and conclusively establish that the presence of crystal defects in high concentrations is not a pre-requisite for the formation of amorphous phase.

Keywords

Diffusion couples solid state reaction amorphous phase interdiffusion zirconium-copper system 

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Copyright information

© Indian Academy of Sciences 1989

Authors and Affiliations

  • K Bhanumurthy
    • 1
  • G K Dey
    • 1
  • S Banerjee
    • 1
  • S K Khera
    • 1
  • M K Asundi
    • 1
  1. 1.Physical Metallurgy DivisionBhabha Atomic Research CentreBombayIndia

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