TY - CONF A1 - Woydt, Mathias A1 - Mohrbacher, H. T1 - Tailoring the functional properties of niobium carbide N2 - Several phases, like Nb₄C₃, Nb₆C₅ and other short and long range ordered phases occur in the region of homogeneity of NbCₓ (0,75≤ x ≤1.0) in the binary phase diagram. Properties, like micro-hardness, hot hardness, sliding wear resistance, elastic modulus and toughness can be tailored by the C/Nb ratio, the addition of secondary carbides and the type of binder. Supporting results from different grades with varying C/Nb ratio or binder types were illuminated. Thus, the NbC system offers to producers a wider process window, than WC. The impact of These tailored properties on sliding wear and cutting performance was illuminated by tribological and machining results. Niobium is today largely available. NbC can be synthesized by carbothermal conversion of Nb₂O₅ or be metallurgically grown and leached out, provides comparably low friction in many relevant tribo-contacts and displays low wear. NbC and Nb₂O₅ have so far no REACH classification related to human toxicology and are not listed as substances of very high concern contrary to WO₃ and Co₃O₄. T2 - 40th International Conference and Exposition on Advanced Ceramics and Composites CY - Daytona Beach, FL, USA DA - 24.01.2016 KW - Niobium carbide KW - Hard metal KW - Wear KW - Friction KW - Machining KW - Cutting KW - Metal matrix composite PY - 2016 SP - Paper: 2347292, 1 EP - 13 AN - OPUS4-35640 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias A1 - Mohrbacher, H. A1 - Vleugels, J. A1 - Huang, S. T1 - Potentials of niobium carbide (NbC) as cutting tools and for wear protection N2 - The differences between the binary phase diagrams W-C and Nb-C illuminate several parameters for tailoring the properties of NbC. In the region of homogeneity of NbCx, with Nb4C3 and Nb6C5 other Niobium carbide phases occur. Properties, like micro-hardness, hot hardness, sliding wear, elastic modules and toughness can be tailored by the C/Nb Ratio, secondary carbides and the type of binder. Supporting results from different grades with varying C/Nb ratio or binder types will be illuminated. Thus, the NbC system offers to producers a wider parameter window, than WC. T2 - 41st International Conference and Exposition on Advanced Ceramics and Composites CY - Daytona Beach, FL, USA DA - 22.01.2017 KW - Cutting KW - Friction KW - Hard metal KW - Machining KW - Metal matrix composite KW - Niobium carbide KW - Wear PY - 2017 AN - OPUS4-39392 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -