The use of niobium carbide (NbC) as cutting tools and for wear resistant tribosystems
Woydt, M; Mohrbacher, H
| HERO ID | 4797021 |
|---|---|
| In Press | No |
| Year | 2015 |
| Title | The use of niobium carbide (NbC) as cutting tools and for wear resistant tribosystems |
| Authors | Woydt, M; Mohrbacher, H |
| Journal | International Journal of Refractory Metals and Hard Materials |
| Volume | 49 |
| Page Numbers | 212-218 |
| Abstract | The tribological profile of alumina (99.7%) mated against rotating disks made in binder-less niobium carbide (NbC) and cobalt-bonded NbC were determined under unidirectional sliding tests (0.1 m/s to 8.0 m/s; 22 degrees C and 400 degrees C) as well as in oscillation tests (f = 20 Hz, Delta x = 0.2 mm, 2/50/98% rel. humidity, n = 10(5)/10(6) cycles) under unlubricated (dry) conditions. In addition, the microstructure and mechanical properties of binderless NbC and NbC bonded with 8% cobalt were determined as well. The reason for testing hot-pressed NbC was to avoid side effects generated by sintering additives and/or second phases. The tribological data obtained were benchmarked with different ceramics, cermets and thermally sprayed coatings. NbC and cobalt-bonded NbC exhibited low wear rates under dry sliding associated with high load carrying capacity. The tribological profile established revealed a strong position of NbC bearing materials under tribological considerations and for closed tribo-systems against traditional references, such as WC, Cr3C2 and (Ti,Mo)(C,N). (C) 2014 Elsevier Ltd. All rights reserved. |
| Doi | 10.1016/j.ijrmhm.2014.07.002 |
| Wosid | WOS:000352667100026 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | Sliding friction; Sliding wear; Ceramic; Oscillation; Coating; NbC; Niobium carbide; Hard metal; Cobalt |