Journal of Materials Science

, Volume 29, Issue 4, pp 987–994 | Cite as

Cobalt intergranular segregation in WC-Co composites

  • J. Vicens
  • M. Benjdir
  • G. Nouet
  • A. Dubon
  • J. Y. Laval


Interfaces between carbide grains in the tungsten carbide-cobalt composite have been considered. Different techniques, such as transmission electron microscopy and energy dispersive X-ray analysis have been used to characterize the orientation relationship, the nature of the planes and the chemical composition of the grain boundaries.The cobalt concentration at WC-WC grain boundaries was determined by X-ray energy selective analysis in the TEM. Cobalt profiles were performed across low-angle grain boundaries, coincidence and general grain boundaries. Cobalt segregation was found whenever dislocations were imaged in the grain-boundary plane of a low-energy grain boundary. The segregation value was compared with the segregation ratio measured in special grain boundaries characterized by a coincidence site lattice.


Transmission Electron Microscopy Carbide Cobalt Tungsten Site Lattice 
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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • J. Vicens
    • 1
  • M. Benjdir
    • 1
  • G. Nouet
    • 1
  • A. Dubon
    • 2
  • J. Y. Laval
    • 2
  1. 1.Laboratoire d'Etudes et de Recherches sur les Matériaux, URA CNRS no. 1317, ISMRaUniversité de CAENCaen CedexFrance
  2. 2.Laboratoire de Physique du SolideUPR CNRS no. 5, ESPCIParis Cedex 05France

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