article · Journal of Materials Research and Technology
Aluminium-based nanocomposites were reinforced with copper- and silver-coated alumina nanoparticles at concentrations between 0 and 15 weight percent. Electroless chemical deposition was applied to coat the nanoparticles to enhance wettability between the matrix and the reinforcing phase. Following hot extrusion, the structural, density, and mechanical characteristics of the composites were evaluated. Microscopic and elemental analyses revealed a near-uniform distribution of nanoparticles throughout the matrix, alongside a slight reduction in relative density compared to pure extruded aluminium. Increasing the nanoparticle concentration steadily improved mechanical performance. At 15 weight percent alumina, the hot-extruded composite achieved hardness measurements of 136 and 132 on cross and longitudinal sections, representing an improvement of approximately 109 percent over pure aluminium. Compressive strength also rose significantly across testing, reaching 763 megapascals at 15 weight percent, which constitutes a 166 percent increase.
Aluminium is valued for its low weight, but pure forms often lack the mechanical strength required for demanding structural uses. Reinforcing the metal with coated ceramic nanoparticles via hot extrusion dramatically boosts both hardness and compressive strength while maintaining a low density. This approach demonstrates a viable method for engineering stronger, lightweight materials suitable for high-load environments.
This work represents early-stage materials research focused on laboratory fabrication and mechanical testing. The notable gains in compressive strength and hardness could eventually benefit structural manufacturing and engineering sectors that require lightweight, load-bearing components. However, the abstract does not detail specific end-use products, production economics, or manufacturing scale-up, indicating that commercial deployment remains at an early stage.
AI-generated from the published abstract. Always read the original work before citing.
In the study, aluminum-based nanocomposites were reinforced with different concentrations of Al2O3 nanoparticles ranging from 0 to 15 wt. %. The Al2O3 nanoparticles were coated by nano Ag and nano Cu by the electroless chemical composition to improve the wettability between the matrix and the reinforcement phase. The influence of the suggested deformation technique and the concentrations of Al2O3 nanoparticles on the microstructure, density, and mechanical properties in terms of hardness and compressive strength of the hot extruded Al/Al2O3 nanocomposites was studied. Results revealed that, as the concentration of nano Al2O3 particles increases, the mechanical properties were improved. XRD, FE-SEM equipped with EDX, and elemental mapping indicates a near-uniform distribution of reinforcement nanoparticles in the matrix. The relative density of the formed nanocomposite recorded a slight decreases than the extruded pure Al. Owing to the presence of the Al2O3 nanoparticles, the Al-15 wt. % Al2O3 hot extruded composite achieves a hardness of 136 and 132 measured on the cross and longitudinal sections, respectively, illustrating an improvement of around 109% over the extruded pure Al. The hot extruded Al/Al2O3 nanocomposites with 5, 10, and 15 wt. % content revealed compressive strength of 564, 579, and 763 MPa, respectively, with an enhancement of 97, 102, and 166% over those of the extruded pure Al.
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DOI: 10.1016/j.jmrt.2023.05.010
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