The invention relates to a method for producing a multimaterial composite and to a multi-material composite. Due to the stepwise change of material properties at the interface between different materials, in particular metallic and polymeric materials, cracks often develop in multimaterial composites, whereby the service life being shortened.
The method according to the invention is based on a gradual adaptation of the material properties of the materials of a multi-material composite at the interface. A composite is formed from at least one metal layer, at least one fibrereinforced or unreinforced first polymer layer and at least one fibre-reinforced or unreinforced second polymer layer formed from the polymer of the first polymer layer and nanoparticles, said second polymer layer being at least partially disposed between the metal layer and the first polymer layer, under the influence of elevated temperature or elevated temperature and elevated pressure, wherein nanoparticles of the second polymer layer diffuse into the first polymer layer so that a gradient layer is formed in which the nanoparticle concentration decreases in the direction of the first polymer layer.
The multi-material composite produced by the method according to the invention has a particularly long service life and can be used, for example, in drive shafts for the aviation, automotive, or shipping industry.