Study the effect of co concentration in nico thin films on some structure and mechanical properties

Abstract EN

Electroplating process has been used to prepare Magnetic NiCo alloys thin film with thickness of 1μm on brass alloy substrate using different Co concentrations .Surface morphology, XRD, atomic absorption, apparent density, open porosity, stresses and microhardness of pure and alloys thin film has been investigated.

Results indicated that the pure and alloy of thin films was polycrstaline with (111) domain orientation changed to (101) with increment Co deposited percentage, which is spontaneously increase with Co molarity increased in the deposition solution.Microstructure for thin films change from nodular structure to pyramidal and dendritic structure with changing Co content in film.

Apparent density for prepared thin films was less than theoretical density about (8g/cm3), and varying with actual Co deposited content.

Open porosity also reduced in general with increment of Co content.

Mechanical properties shows alteration in internal stress behavior of deposited thin films from compressive stress to tensile stress at (0.05M) of Co.

Microhadness also increased with increasing in the Co percentage in deposited thin films,to about(467Kg/mm2).