Scaling and internal oxidation of α-CuSn alloy

Abstract

α-CuSn alloy containing 8.2 wt% tin oxidized in laboratory air at 610°C is studied for its microstructural evolution with time. A cross-sectional study of the sample after oxidation shows the presence of a multilayered oxide scale on the surface and internal oxidation. Oxide morphology is expected to give an insight on undergoing oxidation mechanism. Analysis shows that SnO₂ is present in porous morphology close to the substrate as clusters and not as a continuous layer; and as an internal oxide, occurring non-uniformly throughout the sample surface.

Keywords:

• α-CuSn alloy
• bronze
• microstructure
• scaling
• internal oxidation