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Homogeneous WC–Co-Cemented Carbides from a Cobalt-Coated WC Powder Produced by a Novel Solution-Chemical Route

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A solution chemical route to cobalt-coated WC-powder is described that allows for the preparation of WC–Co powders and compacts having a carbon content very close to the desired carbon content even under an inert atmosphere. The microstructural homogeneity in the sintered WC–Co composites when using the Co-coated grains was found to be superior as compared with conventionally mill-mixed powders, and the structural changes in the individual WC-grains were found to be much smaller, which is ascribed mainly to the fact that the coated grains do not require a grinding step leading to the formation of a tail of smaller WC grain sizes.

Document Type: Research Article


Affiliations: 1: Ångström Laboratory, Department of Materials Chemistry, Uppsala University, Uppsala, Sweden 2: Arrhenius Laboratory, Department of Inorganic Chemistry, Stockholm University, Stockholm, Sweden

Publication date: 2007-11-01

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