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2018-10-15 - Colloque/Article dans les actes avec comité de lecture - Anglais - 6 page(s)

Mégret Alexandre , Stanciu Victor Ioan , Thuault Anthony, Broeckmann Christoph, Sistla Sree Koundinya, Vitry Véronique , Delaunois Fabienne , "Unconventional Sintering of a Commercial Cemented WC-6Co Hardmetal" in Euro PM2018 Congress & Exhibition, Bilbao, Espagne, 2018

  • Codes CREF : Métallurgie (DI2310), Matériaux céramiques et poudres (DI2744)
  • Unités de recherche UMONS : Métallurgie (F601)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) Mechanical properties of cemented tungsten-cobalt carbides strongly depend on the sintering process. Conventional sintering is carried out in a vacuum furnace with long processing times (between 12 and 24 hours for an entire cycle – heating, holding at high temperature and cooling down) and at high temperature (> 1400°C). In these conditions, grain growth is observed during the early stage of the sintering. Unconventional sintering processes have been developed in order to decrease the temperature and the holding time during sintering. At lower temperature and shorter holding time, it is possible to obtain a finer microstructure, which leads to improved mechanical properties. The combination of pressure and/or electric current with the temperature can also help to refine the microstructure. Three different technologies were studied and compared to conventional vacuum sintering: microwave sintering (MwS), spark plasma sintering (SPS) and hot pressing (HP).

Mots-clés :
  • (Anglais) Unconventional Sintering
  • (Anglais) SPS
  • (Anglais) WC-Co
  • (Anglais) Microwave sintering