TY - JOUR A1 - Woydt, Mathias A1 - Huang, S. A1 - Vleugels, J. A1 - Mohrbacher, H. A1 - Cannizza, E. T1 - Potentials of niobium carbide (NbC) as cutting tools and for wear protection N2 - Research and development of WC grades is 90 years ahead of niobium carbide-based hard materials, which showed already as light-weight and unexplored material a very high potential for many technical applications, especially for wear protection and machining. NbC evoluted recently from lab scale to pilot scale, especially in areas where established WC-based materials are causing economic, environmental or technical concerns. Benchmark trials of NbC-based hard metals indicated already a favorable performance in machining of steel components. KW - Niobium carbide KW - Friction KW - Wear KW - NbC KW - Hard metals KW - Machining KW - Nickel PY - 2018 DO - https://doi.org/10.1016/j.ijrmhm.2018.01.009 SN - 0263-4368 VL - 72 SP - 380 EP - 387 PB - Elsevier Ltd. AN - OPUS4-44166 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Huang, S. G. A1 - Vleugels, J. A1 - Mohrbacher, H. A1 - Woydt, Mathias T1 - Densification and tribological profile of niobium oxide N2 - The origin of the intrinsic wear resistance of NbC-based materials is investigated through an assessment of the tribological performance of fully dense, crack-free spark plasma sintered Nb2O5 (here as a reduced polymorph: monoclinic Nb12O29 or NbO2.416). The most likely wear mechanism on NbC is the tribo-oxidation to Nb2O5. The unlubricated (dry) friction and wear behavior of alumina (99.7%) mated against rotating disks of crack-free niobium(V)oxide (Nb2O5) under unidirectional sliding (0.03–10m/s; 22°C and 400°C) and oscillation (f=20 Hz, dx=200 mm, 2/50/98% rel. humidity, n=105/106 cycles) will be presented. The microstructure and mechanical properties of the crack-free Nb2O5 are assessed. The tribological data obtained are benchmarked with different NbC grades, ceramics, cermets and thermally sprayed coatings. KW - Friction KW - Wear KW - Nb2O5 KW - Nb12O29 KW - Niobium oxide KW - Strength KW - Modulus KW - High temperatures PY - 2016 DO - https://doi.org/10.1016/j.wear.2016.02.003 SN - 0043-1648 VL - 352-353 SP - 65 EP - 71 PB - Elsevier B.V. AN - OPUS4-35805 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 - Niobium is today largely available. NbC displayed lower dry sliding friction over WC grades. The softer Ni- and NiMo-bonded NbC1.0-grades have a higer abrasive wear resistance (ASTM G65), even with lower toughnesses, than the tougher WC-Co grades and harder NbC-Co grades. T2 - 41st International Conference and Exposition on Advanced Ceramics and Composites CY - Daytona Beach, FL, USA DA - 22.01.2017 KW - Niobium Carbide (NbC) KW - Cutting tool KW - Hardness KW - Friction PY - 2017 VL - 38 SP - 1 EP - 13 AN - OPUS4-43430 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 tool lifes of uncoated NiMo and NiMo2C-bonded stoichiometric NbC1.0 grades under dry turning 42CrMo4 and C45E were between +30 % to + 100 % higher and up compared to WC-6Co (fine grain). Niobium is today largely available. NbC grades displayed lower dry sliding friction over WC grades. T2 - 19. Plansee Seminar CY - Reutte, Austria DA - 29.05.2017 KW - Niobium carbide KW - Friction KW - Wear KW - NbC KW - Hard metal KW - Machining KW - Nickel PY - 2017 SP - HM 102/1 EP - HM 102/16 AN - OPUS4-40593 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -