Enhancing the oxidation resistance of copper by using sandblasted copper surfaces

Abstract

We show that sandblasting can be employed to effectively enhance the oxidation resistance of copper by suppressing the interfacial delamination between copper and its oxide by modifying the surface roughness of Cu. Increasing sandblasting treatment time from 0 to 120 s increases the surface roughness of Cu from 0.12 ± 0.003 µm to 2.89 ± 0.176 µm, which results in improved oxidation resistance of the Cu surfaces and enhances the oxide/substrate interfacial fracture energy from 0.035 J/m 2 to 3.1 J/m 2 determined using nanoindentation. The sandblasting treatment has no appreciable effect on the Young's moduli of the Cu oxide film, which remain nearly constant at around 36 GPa. The improved oxidation resistance is ascribed to the enhanced interfacial adhesion of the sandblasted copper owning to the concave shape of craters generated by sandblasting, which results in a net downward force from the compressive stresses in the oxide film that forces the film to adhere to the Cu substrate.

Effects of Rare Earth Y Addition on Microstructural and Properties of Pure Copper

“…The impact of Y addition on the antioxidant performance of metal copper can be mainly ascribed to the following three aspects [33][34][35]: (1) The purification effect on copper organizations. Y deprives harmful elements from pure copper such as P, S, O, so that copper organizations can be cleaned up.…”

The effect of surface preparation on high temperature oxidation of Ni, Cu and Ni-Cu alloy

“…Mentioned researchers investigated samples that were prepared in slightly different processes like sand-blasting, shot-peening or grinding and polishing ended on nonidentical levelsthe question arises if there is a relationship between the surface roughness and number of microstructural defects that were induced into subsurface area in preparation process. It was already proved by Yuan et al [9] that increasing the time of sandblasting for copper samples improves samples' roughness and also their corrosion resistance.…”

“Mechanically prepared copper surface in oxidizing and non-oxidizing conditions”

“…Oxidation resistance of pure copper is also affected by increased surface roughness and number of defects. Therefore, surface preparation process of components made out of copper is of prime importance in further applications [17,18].…”