Abstract
This paper deals with properties and applications of advanced WC and new (Fe/Ni/Co) powders. Special attention is focused on (1) fine-grained and highly sinteractive (Fe/Ni/Co) powder and (2) ultrafine WC powder with linear WC intercepts averaging 100–130 nm in structures of WC–10 wt% Co hardmetals. The quality, individual features and properties of the new powders are shown to be a key factor in achieving excellent and improved properties and performance of hardmetals and diamond tools. A number of correlations are established between powder properties, sintering behaviour and hardmetal structures and properties. In addition to other well-known parameters, the lattice microstructure, as well as the mixed-crystal phases of the new powders, are shown to be essential for optimized sintering, structure formation and improved properties of the tool materials.
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