Optimization of MWCNTs/Al nanocomposite fabrication process parameters for mass density and hardness

Abstract

Engineering materials and their development are essential for a civilized society, and they have always played a key role in the industrialization of a country. The performance of materials can be increased by selecting appropriate fabrication process parameters. In this paper, the effect of fabrication processing parameters on multi-responses of lightweight material, namely, functionalized multiwalled carbon nanotubes-aluminum nanocomposite have been investigated through Taguchi-based grey relational analysis. Ethanol wt. %, milling time, compaction pressure, and sintering temperature were considered controlled parameters. Phase, surface morphology, and chemical compositions of the nanocomposite have been analyzed by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray techniques. The scanning electron microscope images revealed that the optimal parameter combination is essential for decreasing void and crack formation during the powder metallurgy process and increasing the material performance index. Grey relational analysis was performed to evaluate optimal sample fabrication processing parameters by using grey relational grade as performance index measurement. The most influential parameter was investigated using main effect plots, interaction plots, contour plots, and analysis of variance. The results show that the optimal combination of sample fabrication parameters is A1B2C3D3. The results also show that the compaction pressure has a stronger correlation to the responses with a 46.92% contribution followed by sintering temperature. The % error between the predicted and experimental grey relational grades at the optimum-level combination is 1.83%. The Monte Carlo simulation data distribution plots show that the ranges of experimental mass density and hardness values are consistent with estimated simulated model values. Further, a regression equation has also been developed to establish the predictive model for the grey relational grade. The model analysis shows that the predictive model is adequate for evaluating grey relational grades. Therefore, this study confirms that the proposed approach can be a useful tool for improving materials’ performance.

Research progress on ceramic nanomaterials reinforced aluminum matrix nanocomposites

“…Recently, there is a huge research interests on various nanomaterials reinforced aluminium/alloy matrix nanocomposites. Aluminum has been reinforced with different types of ceramic or carbon based nanomaterials [7,40,[60][61][62][63]. Wang et al [43] described microstructure, tribological and mechanical properties of aluminium matrix nanocomposite which was reinforced with graphene.…”

Effect of dry sliding wear parameters on the specific wear rate of α-MnO2-epoxy nanocomposites

“…36 Many researchers found that this method was most efficiently applied to optimize process parameters and experimental trials were also conducted by them with a minimum number of trials as compared with a full factorial design. 37–40 From an accuracy point of view, it is better to choose a full factorial design than a partial one. But, time, cost, and labor-saving can be achieved through partial factorial design.…”