TY - GEN A1 - Steinborn, Gabriele T1 - Improved wear resistant ceramics of metal incorporated NbC processed with gas pressure sintering N2 - Tungsten carbide (WC) dominates wear protection and machining since more than 90 years due to its hardness with an associated good toughness and high melting point. It was recently demonstrated that Niobium Carbides are wear resistant and show a better performing under cutting than WC grades. In order to profit of the good properties of Niobium Carbide, specific processing techniques need to be developed. The density of NbC is half of WC and offers colloidal processing for perfectly mixing NbC with metallic binder (up to 15 vol.-% Ni) and secondary carbide-particles. The used NbC-powder has an average particle size d50 of 3 micron measured by laser granulometry analysis. The true density was 7.68 g/cm3. An Oxygen content of the used NbC of 0.4 % is caused by residual slag content. It is possible to increase the stability of the NbC-suspensions and to reduce their viscosity by adding a specific dispersing agent. This surface-modified NbC powders (containing Ni)were uniaxially pressed and then gas pressure sintered in vacuum or Argon atmosphere. All samples reached more then 98 % of there theoretical density. The micrographs showed a homogenius distribution of the Ni-binder in the product. The tribological behaviour under dry sliding and oscillating up to 600 °C and the mechanical properties were studied. T2 - 92. Jahrestagung der Deutschen Keramischen Gesellschaft CY - Berlin, Germany DA - 19.03.2017 KW - NbC KW - Wear resistant KW - Gas pressure sintering PY - 2017 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/40242 AN - OPUS4-40242 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany