Nanostructured novel cemented hard alloy obtained by mechanical alloying and hot-pressing sintering and its applications

A novel cemented carbides (W0.8Al0.2)C-0.7-Co with different cobalt contents were prepared by mechanical alloying and hot-pressing technique. Hot-pressing technique as a common 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 much lower than WC-Co system. The novel materials were easy to process nanoscale sintering and get the rounded particles in the bulk materials. The most interesting and important phenomenon is there is almost no eta-phase in the (W0.8Al0.2)C-0.7-Co cemented carbides system although the carbon deficient get the astonished 30% value. (c) 2007 Elsevier B.V. All rights reserved.