Chemical synthesis of WC-Co from water-soluble precursors : the effect of carbon and cobalt additions to WC synthesis

Ulla Kanerva (Corresponding Author), Marjaana Karhu, Juha Lagerbom, Anna Kronlöf, Mari Honkanen, Erja Turunen, Tarja Laitinen

    Research output: Contribution to journalArticleScientificpeer-review

    11 Citations (Scopus)

    Abstract

    The chemical synthesis of WC-Co from water-soluble precursors and the effect of carbon content and cobalt addition were studied. Ammonium metatungstate AMT as tungsten source, glycine as a carbon source and cobalt acetate Co(C2H3O2)2 as a cobalt source was dissolved in water and spray-dried, and thermal synthesis in Ar atmosphere was performed. In order to understand the effects of carbon content and cobalt addition on synthesis steps, and the chemical and phase structure, thermogravimetry (TGA) with Differential Scanning Calorimetry (DCS) and mass spectrometry was used together with X-ray diffractometry and chemical analysis. The results reveal that carbon content mainly affected reduction temperatures and cobalt addition to reaction route and solid state synthesis temperature. This presented manufacturing route with water-soluble raw materials was a potential way of preparing nanostructural WC-Co composition with the correct phase structure and chemical composition.
    Original languageEnglish
    Pages (from-to)69-75
    JournalInternational Journal of Refractory Metals and Hard Materials
    Volume56
    DOIs
    Publication statusPublished - 2016
    MoE publication typeA1 Journal article-refereed

    Keywords

    • nano-sized WC-Co synthesis
    • spray drying
    • water soluble precursors
    • ProperPart

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