Optimization of wear parameters on Ni–Al2O3 nanocomposite coating by electrodeposition process

Abstract

The present work concentrates on the nanocomposite coating on the mild steel substrate. The mild steel substrate demands good surface preparation in order to have better adhesive strength of coating. In the light of this, surface is grinded and cleaned later followed by rinsing. In this work, Ni-Al 2 O 3 composite coating was successfully coated on mild steel (AISI 1018) substrate. The study on different wear parameters on the specific wear rate is carried on. The experimental design is carried out with 20 trails as per central composite design considering normal load, sliding speed and sliding distance on the samples. The morphology of surface after coating and wear analysis is studied. The results revealed higher wear resistance by the presence of nano-Al 2 O 3 particles in the Ni matrix composite coating. The effect of normal load and its interaction with sliding distance are found to be more effective on specific wear rate. The abrasive nature of wear is observed due to the presence of hard Al 2 O 3 nanoparticles embedded in the Ni matrix. The chemical composition and distribution of particle analysis is carried out by SEM and EDS micrograph.

Experimental Investigation, Modeling, and Optimization of Wear Parameters of B4C and Fly-Ash Reinforced Aluminum Hybrid Composite

“…The sliding wear parameters range were selected as load: 10-50 N; sliding distance: 500-1,500 m; sliding speed: 0.5-1.5 m/s, based on previous literature [29,39,44,58,70,73]. Further, five levels of each factor were calculated as per the central composite design based on the rotability value (α = 1.682), which was obtained using Minitab 19 software (detailed discussion in experimental design section) [62,73,74]. The test rig has three major elements: the pin on disc test apparatus, the controlling device, and the computer with Windocom 2010 software connected to the controlling device.…”

“…Central composite design (CCD) is a factorial or fractional factorial design that is able to fit the full quadratic model because of the design consists of a center and axial (star) points. The development of the experimental design matrix was done using the central composite design with a 20 run test and design rotability (α) of 1.682 under the RSM technique in Minitab 19 [73,74]. The design matrix is constructed based on five levels of three input parameters i.e., load, sliding speed, and sliding distance, using the central composite design.…”