Abstract
A new thermochemical processing method for preparing high surface area powders, starting from homogeneous precursor compounds, has been developed. The method has been applied successfully to the synthesis of nanostructured WC-Co powders. These powders have been consolidated by low pressure plasma spraying and by cold compaction and liquid phase sintering. The use of VC as a grain growth inhibitor is essential to mitigate the WC grain growth during liquid phase sintering. Theoretically dense VC-doped WC-Co materials display superior hardness, wear resistance and cracking resistance.
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