Filtern
Erscheinungsjahr
Dokumenttyp
- Vortrag (48) (entfernen)
Referierte Publikation
- nein (48)
Schlagworte
- Temperature (3)
- Niobium carbide (2)
- Steel (2)
- Abrasion (1)
- Alpha-alumina (1)
- Cermet (1)
- Colloidal processing (1)
- Composites (1)
- Hardness (1)
- Lubricated sliding (1)
Organisationseinheit der BAM
Eingeladener Vortrag
- nein (48)
Tribology of Advanced Ceramics III: Principles of solid lubrication - materials and mechanisms
(2002)
Promoting the infrastructure - prestandardisation endeavours for ceramic powders and green bodies
(2002)
Analysis of oxidative processes in SiC-TiC-TiB2 ceramic composites during tribological loading
(2009)
Wear of thin steel wires
(2010)
Tribological behaviour of polyurethane under oscillating sliding conditions against cast iron
(2012)
Niobium-titanium carbide cermets with nickel binder have been prepared by colloidal processing in water without a milling step by using Poly-diallyl-dimethyl-ammonium chloride (Poly-DADMAC) as a dispersant. Homogeneous microstructures with relative densities larger than 99% of the theoretical density have been achieved by gas pressure sintering in argon atmosphere. However, mechanical properties like hardness and strength were slightly decreased due to precipitation of free carbon.
Niobium carbide is a ceramic material which can be used with excellent results to replace tungsten carbide with cobalt binder. Furthermore, it might be manufactured by classic ceramic technologies and even colloidal processing. To achieve high toughness and strength, it is necessary to have a perfect mix of hard phase and binder, which is mainly achieved by ball milling. Mechanical and physical properties as well as results on different tribological and application-oriented machining tests are presented. The results have been compared with results obtained with NbC grades with Co and Fe3Al binders as well as with pure binderless hot-pressed NbC and SPS sintered Nb2O5.