Właściwości materiałów ceramicznych spiekanych w warunkach wysokich ciśnień

Abstract

The microstructure and mechanical properties of polycrystalline diamond compacts are strongly influenced by the type of applied bonding phase. In this paper, various aspects of diamond powders sintering with $Ti$, $TiC$, $SiC$, $Ti_3SiC_2$ and $Mo_5Si_3$ bonding phases, as the replacement of popular cobalt, are presented. Diamond compacts are prepared using high temperature-high pressure Bridgman-type apparatus. Sintering of the diamond compacts is carried out at ~2073 K and 8±0,2 GPa. The best properties of the examined diamond compacts were measured for those with titanium compounds bonding phase: their radial compressive strength was up to 341 MPa. Diamond compacts with ceramics binders are more thermally stable.