Abstract
In this investigation, five aluminum matrix nanocomposites were obtained by the hot pressing at 800 MPa and 600 oC. The electrolysis coating technique was utilized to prepare the nano-nickel powder. The fabricated nanocomposites were characterized by studying their chemical composition, microstructure, hardness, and thermal expansion coefficient. The scanning electron microscope of the microstructure of the electroless nickel powder shows that the Ni particles have nano-size where it was less than 100 nm. The EDAX analysis of the fabricated composite that contains 25 wt. % (Al2O3) in different regions was established. No elements rather than Al, Cu, Ni, and O were observed. The hardness of the aluminum matrix increases as the content of the Al2O3 increases. In addition, the thermal expansion coefficient was reduced by increasing the Al2O3 content for reasons related to the low thermal expansion of the alumina reinforcement 7.2 x10-6 mm/oC compared with aluminum that has 23.1x10-6 mm/oC.
Highlights
A composite material is a combination of two or more elements insoluble in each other
Based on the matrix of the composite, it can be classified into three types that are metal matrix composite (MMC), polymer matrix composite (PMC), ceramic matrix composite (CMC). renforcements are used according to the needs application to achive the required propeties [1,2,3]
When used for producing a diamond reinforced metal matrix to avoid the graphitization of diamond particles, it presents the advantage to strictly control the processing parameters
Summary
A composite material is a combination of two or more elements insoluble in each other. To add the reinforcement to the matrix and distributed it in a good manner without any agglomerations, the powder metallurgy technique is considered a good choice to achieve that It is a cost-effective method for producing complex-shaped parts. When used for producing a diamond reinforced metal matrix to avoid the graphitization of diamond particles, it presents the advantage to strictly control the processing parameters (temperature, pressure and time) It seems like a spark plasma sintering process, but this process established without. The results illustrate that using finer alumina particles and sintering temperature of 600 oC attributed to producing composites with high relative density (96.5 to 99%) and enhanced the mechanical properties This experimental investigation aims at explore the impact of the Al2O3 content on the microstructure, density, thermal expansion, and hardness of the aluminum matrix
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
