Surface morphological investigation of iron films during oxidation

Abstract

Different stages of iron films evaporated under a vacuum of about t0-5 torr were investigated with and without the addition of aluminium impurity at different percentages. Micrographs of such films heated at 623 K for 2 h show similar network spreading of oxide growth. Addition of aluminium significantly improves the oxidation resistance of iron films by the formation of AI203 layer.