%0 Journal Article
%T CVD Coating of Oxide Particles for the Production of Novel Particle-Reinforced Iron-Based Metal Matrix Composites
%A Sebastian Brust
%A Arne R£¿ttger
%A Werner Theisen
%J Open Journal of Applied Sciences
%P 260-269
%@ 2165-3925
%D 2016
%I Scientific Research Publishing
%R 10.4236/ojapps.2016.64026
%X This paper focuses on surface metallization of oxide particles by means of titanium nitride (TiN) thin films for the production of highly wear-resistant metal matrix composites (MMC) on Fe-base for wear protection applications. These powder-metallurgically produced materials consist of a metallic matrix with embedded oxide hard-particles such as alumina or zirconia. The poor wettability of these oxides by iron-base melts and the resulting weak bonding between the components lead to porous materials and weak tribomechanical properties, thus limiting the material¡¯s application range. To counteract such problems, this paper describes a processing route in which the oxide particles are pre-metallized by application of a thin TiN coating by means of chemical vapor deposition (CVD). This surface metallization should increase the wettability and bonding behavior between the ionically bonded particles and the iron-base alloy, which should improve the mechanical and tribological properties. Therefore, a CVD device for coating ceramic particles was constructed and is described in this paper. Furthermore, coatings deposited on the ceramic sub-strates were investigated by means of RBS, SEM and XRD. In addition, the feasibility of producing metal matrix composites (MMC) by admixing the TiN-coated oxide particles with a Fe-base alloy and their further densification by supersolidus liquid-phase sintering is demonstrated.
%K Chemical Vapor Deposition
%K Particle Coating
%K Metallization
%K Metal Matrix Composites
%K Reactive Wetting
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=65996