Modelling and Deliberation of Multireinforcement Surface on Tribothermal Adsorption Performance of Nickel Alloy Matrix Hybrid Nanocomposite

Abstract

The present research work is aimed at developing a nickel alloy (Ni-Cr) matrix hybrid nanocomposite comprising 5wt, 10wt, and 15wt of alumina nanoparticles (Al₂O₃) size of 50nm with stable weight percentage (5wt) of titanium dioxide (TiO₂) nanoparticle via vacuum die casting process for an automobile brake pad application. The deliberation of multireinforcement surface on nickel alloy matrix tribological performance was evaluated by constant sliding distance (200m) on dry sliding condition via rotating pin on disc apparatus with different loading conditions of 10N, 30N, 50N, and 70N under the sliding velocity of 0.25m/sec, 0.5m/sec, and 0.75m/sec, respectively. The influences of alumina and titanium dioxide nanoparticles in the nickel alloy matrix resulted in the thermal conductivity increasing by 18 compared to unreinforced nickel alloy. After temperature drop, the coefficient of thermal expansion for nickel alloy hybrid composite decreases progressively with increased reinforcement content as 10wt Al₂O₃/5wt TiO₂. Further inclusion of both Al₂O₃ and TiO₂ in nickel alloy was increased nominally. The thermal adsorption characteristic on composites mass loss was decreased while temperature increased from 28C to 1000C.