Engineering and Technology Journal

Abstract

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).