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purazarng--kazem
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Production of Copper Matrix Composites Reinforced with Aluminum Oxide Particles by In-Situ (Mechanical Alloying and Internal Oxidation) and Ex-Situ Methods
, M.Sc. Thesis Sharif University of Technology ; Purazarng, Kazem (Supervisor) ; Abachi, Parvin (Supervisor)
Abstract
In this study, copper-alumina composite specimens with different reinforcement content were produced in two routes, i.e. in-situ and ex-situ; one specimen as functionally graded material (FGM) was also produced. In first method, copper and aluminum powders were initially alloyed by mechanical alloying route and then the copper oxide powder was added as oxidizer. For the fabrication of Cu-Al2O3 composites using ex-situ method, alumina nano particles powder was added to elemental copper powder. FGM specimen consists of five layers, i.e. pure copper, copper matrix composite having 2, 3, 4, and 5 volume percent alumina. To reduce the particles agglomeration and homogeneous distribution of...