Effect of Ni addition on magnetism and corrosion resistivity of Ti/Co/Ni nanocomposites by sol–gel methods

Abstract

In this study, nanocomposites of Ti/Co with varying Ni content were synthesized via the sol–gel process and calcination at 500 °C for 3 h, which were later used as a precursor for film fabrication. In order to fabricate the Ti/Co/Ni films, the prepared nanocomposites of Ti/Co/Ni were initially spin-coated on a glass substrate, and later heated to 250 °C for 4 h. The crystallite phase and size, surface morphology, microstructure, magnetic behavior, and corrosion resistivity were investigated using XRD, TEM, SEM, VSM, and potentiostat, respectively. The synthesized nanoparticles formed crystallite size ranging between 25 to 30 nm in diameter and exhibited the major crystallite phases of B2 structure, depending on the studied conditions. The saturation magnetization (Ms) was significantly increased from 0.07 to 1.27 emu/g and coercivity (Hc) increased from 280 to 400 Oe. Based on the result, the increase of Ni content enhanced not only the magnetic behavior but also the corrosion resistivity. Based upon the results, the synthesis of Ti/Co/Ni via sol–gel method was successfully conducted and used as a precursor for film fabrication.