Fabrication, thermal stability and mechanical properties of novel composite hardmetals obtained by solid-state reaction and hot-pressing sintering

A novel cemented carbides (W0.7Al0.3)C0.65–Co with different cobalt contents were prepared by solid-state reaction and hot-pressing technique. Hot-pressing technique as a novel technique was performed to fabricate the bulk bodies of the hard alloys. The novel cemented carbides have superior mechanical properties compared with WC–Co. The density, operate cost of the novel material were lower than WC–Co system. The novel materials were easy to process nanoscale sintering and get the rounded particles in the bulk materials. There is almost no η-phase in the (W0.7Al0.3)C0.65–Co cemented carbides system although the carbon deficient get the astonished 35% value.