Abstract
BaTiO3 nanopowders prepared by using organic acid precursor method were thermally grown onto steel under a vacuum of 10−5 torr, using an Edwards E-306 coating unit. Reflection measurements of coated steel, in the spectral range 200-1100 nm, were carried out using a double beam spectrophotometer. Characterizations of the deposited layer such as adhesion, hardness, dielectric properties and corrosion resistance have been investigated. Surface morphology of fabricated thin film using scanning electron microscope (SEM) reveal that adhered, dense and void free deposited film enables the coated steel to exhibit high corrosion resistance. The microhardness is improved from 116 HV for uncoated steel to 464 HV for coated ones. Dielectric properties were investigated for coated and pure steel samples. The impedance and phase were found to increase with frequency for the as-deposited samples.
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