Effects of coating thickness on thermal conductivities of alumina coatings and alumina/aluminum hybrid materials prepared using plasma electrolytic oxidation

The aim of this paper was to investigate the effects of coating thickness on the thermal conductivities of alumina coatings and alumina-coated aluminum substrates as hybrid materials prepared using plasma electrolytic oxidation (PEO). The coating thermal conductivities were measured with the comparative guarded heat flow method (also called cut-bar method). The guarded insulation system adopted in this method can effectively reduce the radial …