A Novel Method for Obtaining Polycrystalline Diamond Cutters
The present work comprises a study about the possibility of obtaining polycrystalline diamond cutters through a novel method of sintering both layers at the same time. This possibility was tested through the sintering of a diamond layer over a hard metal (WC+15wt%Co) support under conditions of 5.0 and 6.5 GPa of pressure and 1400 to 1600º C of temperature. The sintering conditions were imposed in two ways: directly, or with pre-sintering. The samples were tested by measuring microhardness, wear resistance, densification, and SEM. The results of the tests have shown the possibility of obtaining good quality inserts by sintering both layers of compacted powder.
Lucio Salgado and Francisco Ambrozio Filho
R. C. Tardim et al., "A Novel Method for Obtaining Polycrystalline Diamond Cutters", Materials Science Forum, Vols. 660-661, pp. 477-482, 2010