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to Metal Matrix Composites
Dr. Dmitri Kopeliovich
Co-deposition is a process, in which matrix metal is deposited together with the dispersed phase by one of the deposition techniques.
The following co-deposition methods are used for manufacturing Metal Matrix Composites:
This method (Electrolytic co-deposition) involves Electroplating technique, in which electrolyte solution of matrix metal ions contains suspended particles of dispersed phase. When the matrix metal is deposited on a substrate, the dispersed phase particles are entrapped by the coating, reinforcing the matrix material.
Examples of electrolytic co-deposition:
This method implements Thermal spraying technique for atomizing molten matrix metal, droplets of which are delivered to a substrate in a high velocity gas stream together with dispersed phase particles supplied to the stream from a separate container.
The method allows fabrication of near-net-shape forming of Metal Matrix Composites.
Examples of spray co-deposition:
Aluminum matrix material reinforced by silicon carbide (SiC) is produced by spray co-deposition followed by Rolling.
High Velocity Oxyfuel Spraying (HVOS) method is used for fabrication tungsten carbide-cobalt (WC-Co) composite material, which is conventionally manufactured by more expensive technology of sintering fabrication of Metal Matrix Composites.
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Vapor co-deposition is a group of various methods, utilizing materials in vapor state: Physical Vapor Deposition (PVD), Chemical Vapor Deposition (CVD), Direct Vapor Deposition (DVD).
In these methods coating of solid material is formed as a result of vapor condensation or chemical reaction on a substrate surface.
Vapor co-deposition is used for coating fibers, creating multilayer depositions, fabricating nanostructure composite materials.
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