Article ID Journal Published Year Pages File Type
1625020 Journal of Alloys and Compounds 2008 5 Pages PDF
Abstract
Different approaches have been investigated to synthesize Al(Zn)-4Cu/Al2O3 composites by displacement reactions involving Al, ZnO and CuO. The reactions have been performed either by mechanosynthesis, exothermic dispersion or a combined mechanical and thermal activation process. Differential thermal analysis, X-ray diffraction and scanning electron microscopy have been used to study the various reaction mechanisms and transformations. High-energy ball milling of the powder modifies the reactivity of the system. A milling treatment not only reduces the reaction temperature, but can also induces a different reaction path. It is reported here that an appropriate mechanical-thermal treatment leads to the synthesis of an Al(Zn)-4Cu/Al2O3 composite. The hardness and wear resistance of the in situ composites increase with the milling time.
Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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