Current surfacing methods, such as chemical etching and sintering, are highly specialised and permit little variation over the surface texture characteristics. These processes involve heat or chemical treatments which can alter the structure of the bull material. In addition, these methods are performed as secondary operation and thus represent significant increases in component cost and lead time. Moreover surface patterning with high aspect ratios are not achievable nowadays on metals with imprinting or subtractive technologies such as Electron Beam Melting, Laser ablation, and lithographic techniques.
By choosing the proper pattering methodology and deposition strategies, the Manudirect’s MLD give the possibility to deposit a wide range of different structures on planar and curved surfaces.
Example for this application is the Orthopaedic Implants, a major issue with joint prosthesis is establishing their permanent fixation to the adjacent bone: the use of porous surface textures for biologic attachment of implants by the ingrowing bone offers a valuable alternative to acrylic bone cements. Specific surface porosity and pore size are essential condition for providing bone cells an environment conducive to osteointegration.
An other possible application is the additive manufacturing by micro laser deposition of hooks, overhangs or teeth, much like “Velcro”, to improve the fixation strength of two joined surfaces, where the the hooks acts as anchors for the adhesive or polymer material.