Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1475328 | Journal of the European Ceramic Society | 2012 | 6 Pages |
The work deals with the preparation of dense SiC based ceramics with high electrical conductivity. SiC samples with different content of conductive TiNbSiCO based phase were hot pressed at 1820 °C for 1 h in Ar atmosphere under mechanical pressure of 30 MPa. The conductive phase is a mixture of 50 wt% TiNbC (molar ratio of Ti/NbC is 1:1.8) and 50 wt% eutectic composition of Y2O3SiO2. Composite with 30% of conductive TiNbSiCO phase showed the highest electrical conductivity 28.4 S mm−1, while the good mechanical properties of SiC matrix were preserved (fracture toughness KIC = 5.4 MPa m1/2 and Vickers hardness 17.8 GPa).The obtained results show that the developed additive system is suitable for the preparation of SiC-based composite with sufficient electrical conductivity for electric discharge machining.