Microstructure Property Relationships in Thermal Sprayed Composite Coatings by Modelling & Simulations

Sammanfattning

Composite coating are highly heterogenous that makes analysing its properties difficult. Simulation tool such as Object-Oriented Finite Elements offers an intuitive approach to solve for the thermal conductivity and mechanical stiffness. The aim of this study is to develop a finite element model for alumina-hexagonal boron nitride (hBN) composite coatings using images captured with Scanning Electron Microscope and artificially generated microstructures. OOF2, an image-based finite element analysis software was used to calculate the thermal conductivity and mechanical stiffness. The results showed that increased hBN content enhances the thermal conductivity at the cost of stiffness. Artificial microstructures have little resemblance to SEM microstructures, but the results showed the effects of hBN content at 40wt%. Further studies can explore the thermal and mechanical properties with through-plane hBN orientation and expand the OOF2 analysis to three dimension environment.