Pokročilé technológie / Techniky povlakovania /
Diffusion bonding of coated multifilament fibre tows is used for the preparation of metal matrix composites (MMCs). Some coated layers prevent reaction between fibres and matrix or increase the surface wettability of fibres by molten metal.
Principle of operation
Metal coatings on continuous multifilament carbon fibre tows can be obtained by various technologies, such as chemical vapour deposition (CVD) process, physical vapour deposition (PVD) process, autocatalytic (electroless) plating process, electrolytic (galvanic), etc. All methods related to metals deposition on strand of fibres have common problem – i.e. how to spread effectively the tow at the beginning of the deposition process.
Preparation of copper matrix/carbon fibre composite.
Nickel coating of carbon fibres to increase electric conductivity in polymer matrix composites.
Copper coated of Torayca T-300 carbon fibres
Fabric made from copper coated carbon fibre tow
Cross sectional view of Ni coated carbon fibres
EDS spectrum acquired from Ni coating (point +)
Ni coated carbon fibre tow
Ni coating imprinting the C fibre surface morphology
- Lab-scale facility with several steps – desizing, electroless metal coating, galvanic metal coating, winding