Publications
Effect of Cu nanoparticles on microhardness and physical properties of aluminum matrix composite prepared by PM
Mar 27, 2025Journal AIMS Materials Science
Publisher AIMS Press
DOI 10.3934/MATERSCI.2025013
Issue 2
Volume 12
Nanoparticles of metal and other materials are a proven reinforcing material for producing a high-performance aluminum composite utilized in modern engineering applications. The ultrasonic mixing process is conducted to ensure a typical distribution of nanoparticles in the aluminum matrix. The present work aims to study the effect of copper nanoparticles on microhardness and physical properties of Al-composite prepared by powder metallurgy techniques with ultrasonic mixing. The aluminum nanocomposites were fabricated with different volume fractions (0, 5, 10, 15, 20, and 25 wt%) of Cu nanoparticles. To examine the effectiveness of the mixing, compacting, and sintering process, nanocomposites were characterized using field emission scanning electron microscopy (FESEM) and energy-dispersive X-ray (EDX) and elemental mapping analysis. A uniform distribution of Cu nanoparticles was established within the Al matrix. The composite was characterized by an increase in density and a decrease in porosity with increased Cu nanoparticles. Increasing Cu nanoparticles enhanced the mechanical properties of the Al-Cu composite through an increase in its hardness. A direct relationship between Cu nanoparticles and thermal and electrical conductivity was found; in particular, there was a distinct enhancement in electrical conductivity, as the composite with 25 wt% Cu nanoparticles reached 78.87% of the electrical conductivity of pure Cu. © 2025 the Author(s), licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0)
Effect of Adding Nano Ag on Mechanical and Physical Properties of Cu–10% Fe Prepared by Powder Metallurgy Technique
Mar 1, 2021Journal Tikrit Journal of Engineering Sciences
Publisher Tikrit University
DOI 10.25130/tjes.28.1.02
Issue 1
Volume 28
Copper-matrix composites have received a lot of attention and are used widely in various applications, such as electronics, machinery, automobile, military and aerospace; because of their remarkable electrical conductivity, high thermal conductivity and excellent mechanical properties. Among these are copper-iron composites which found many engineering applications due to the role of Fe in enhancing the mechanical properties of these composites beside its low cost. However, Fe addition reduces electrical and thermal conductivity therefore, binary Cu-Fe composites are not suitable for applications where these properties are the main requirement. Many studies have been done to enhance these properties by the addition of alloying elements. The present work aims to study the effect of adding Nano Ag on mechanical and physical properties of Cu-10 wt% Fe composites prepared by powder metallurgy technique. The results showed the effectiveness of Nano Ag in enhancing both mechanical and physical properties of Cu-10 wt% Fe composite. It is found that bulk density, electrical conductivity, and thermal conductivity have been increased by 1.19%, 46%, and 46% respectively on adding 5% Nano Ag. Hardness and compression strength have been increased by 17.3% and 32.8% respectively by adding 4% Nano Ag, while wear rate was reduced by 13.4% by adding 4% Nano Ag. © 2021 THIS IS AN OPEN ACCESS ARTICLE UNDER THE CC BY LICENSE http://creativecommons.org/licenses/by/4.0/
Effect of Yttrium Oxide on Mechanical and Physical Properties of Fe–10%Cu Composite
Jul 1, 2020Journal Tikrit Journal of Engineering Sciences
Publisher Tikrit University
DOI 10.25130/tjes.27.3.08
Issue 3
Volume 27
Iron-based composites have found a lot of industrial applications such as bearings, camshafts, connecting rods, pulleys, various valves, oil pump gears and many other applications in the automotive and other industries due to their low cost, availability, and high strength. The present study aims to prepare Fe-10 vol.% Cu-(0 – 5) wt.% nano Y2O3 composites by powder metallurgy technique and studying their physical and mechanical properties. The powders were mixed into ball mill for 30 minutes, followed by room temperature uniaxial compaction at 700 MPa for 3 minutes. The green specimens were sintered at 1000oC for 1 hour. The results of the present study showed that nano yttrium oxide has significant effects on both physical and mechanical properties of Fe-10%Cu composite. The bulk density was increased by 0.92% and the true porosity was decreased by 6.4% on increasing the nano oxide content from 0% to 3% respectively. Vickers microhardness was increased by 5.9% on increasing Y2O3 up to 1% followed by gradual decrease on further increase above 1%. Wear rate was decreased by 21% on increasing the nano oxide content from 0% to 3%. On the other hand, the compressive strength was decreased by 47% on increasing Y2O3 up to 5%. © 2019 TJES, College of Engineering, Tikrit University.