Individuazione ed ottimizzazione dei parametri di processo nell’applicazione di layer di grafene

The present work aims to investigate and to apply graphene increasing heat exchange aimed at heat dissipation. In the first part, the measurement of the thermal diffusivity of thin layers is investigated in order to evaluate the thermal characteristics of the copper-graphene matrices obtained. At the same time, the electrodeposition parameters have been obtained. As far as the application of graphene is concerned, the penetration of the coating into finned structures according to the pitch of the finning has been studied. Furthermore, in order to solve the problem of cluster formation in the coating, the possibility of obtaining graphene multilayers has been studied, increasing the thermal diffusivity of 60% compared to only copper coating. The results obtained was applied at 2 study case, a CPU cooler and a micro head engine. Both applications were compared to FEM simulation of coating copper-graphene matrix. The simulated data are in accordance with the experimental data. In the second part of this work metal foam are investigated to obtain an increment of surface exposed (consequently thermal dissipation). Metal foams characteristics and technology production were investigated. 3D models of metal foam were developed due to a spatial Voronoi tessellation. The model designed are totally definable in CAD ambient. An Indirect Additive Manufacturing process was used to obtain metal foam samples. The samples were tested both thermal test both compression test showing performance superior at commercial foam.