Effect of nano Al₂O₃ coated Ag reinforced Cu matrix nanocomposites on mechanical and tribological behavior synthesis by P/M technique

Abstract

In this study, copper powder was reinforced with different weight percentages of Al2O3 particles (0, 5, 10, and 15 wt.% Al2O3 coated Ag) to produce Cu-Al2O3 composites by mechanical alloying and uniaxial cold pressing/sintering route. Electro-less deposition was used to coat Al2O3 particles with Ag. The microstructure of the consolidated samples was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) elemental mapping. The porosity, microhardness, and wear behavior of the consolidated samples were also investigated as a function of Al2O3 content. The EDX mapping images reveal that the Al2O3 reinforcement particles were homogeneously distributed into the Cu matrix. Microstructural analysis shows that the addition of Al2O3 coated Ag particles improves density of the composites coating. SEM micrographs result shows that slight porosities exist in the composites produced. Furthermore, the average hardness of the composite coatings varies from 72.3 to 187.6 HV as Al2O3 content increases from 0 to 15 wt.%. The wear test results showed that the composite with higher Al2O3 content 15 wt.% showed the best wear resistance.

On the understanding and prediction of tribological properties of Al-TiO2 nanocomposites using artificial neural network

“…16,17 Since then, academics have worked to better understand the procedure and have begun to develop it by examining the impact of the ARB parameters involved, performing hot ARB, using it on a variety of metals and reinforcement particles, creating multilayered composites, and evaluating their mechanical and microstructural characteristics, texture, and other characteristics. [18][19][20][21] Several Al-based composites, including Al/SiC, 22 Al/Al 2 O 3 , 23 Al/TiO 2 , 24,25 Al/SiO 2 , 26 Al/W, 27 and Al/WC, 28 have been produced using the ARB approach. The use of severe plastic deformation, which refines the grains and hence enhances the strength in accordance with the hall-Petch relation without affecting the sample's size, is the main procedure in ARB.…”

Development of the hardness, three-point bending, and wear behavior of self-lubricating Cu-5Gr/Al2O3-Cr3C2 hybrid composites

“…[6][7][8] It is generally known that adding graphite, a solid lubricant, to the copper matrix can enhance metals' wear and friction characteristics. 9,10 Venkatesh and Vaddi Seshagiri 11 produced copper matrix composite materials by adding Al 2 O 3 and Gr to copper and investigated its wear and corrosion behavior. Their results indicated that the corrosion resistance of the nano and micro-reinforced composites was improved and the weight loss was minimized by increasing the content of graphite in the composite.…”

Microstructures and properties of copper matrix composite wires reinforced with Ti2SnC particles

“…In recent years, copper matrix composites (CMCs) with ceramic reinforcements have been widely studied to achieve good electrical and thermal conductivity and increase hardness and wear resistance [9][10][11][12]. Composites can be used in relays and switches, electrical discharge machining electrodes, ignition pens, and other similar items [13].…”