Electrical Discharge Machining of ZrO2 Toughened WC Composites

O. Malek, J. Vleugels, Y. Perez, P. De Baets, Junhu Liu, Sven Van den Berghe, B. Lauwers

    Research outputpeer-review


    The interrelationships between the dispersion of the ZrO2 phase and the Electrical Discharge Machining (EDM) behaviour of WC-based composites with up to 10 vol % of ZrO2 are investigated. Special attention was given to the homogeneity of the ultrafine WC - nanometric ZrO2 powder based composites which were fully densified by means of pulsed electric current sintering (PECS). XPS measurements reveal the presence of a nanometric WO3 layer on the EDM surface, confirming oxidation as a major material removal mechanism (MRM). The surface roughness after the final EDM finishing regime was strongly influenced by the presence of ZrO2 agglomerates and could be reduced down to 0.15 µm (Ra) on agglomerate-free composites.
    Original languageEnglish
    Title of host publicationProceedings of the International Conference on High Performance P/M Materials
    Place of PublicationAustria
    StatePublished - May 2009
    EventInternational Conference on High Performance P/M Materials - Reutte
    Duration: 25 May 200929 May 2009


    ConferenceInternational Conference on High Performance P/M Materials

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