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Aluminum (Al)-based composites reinforced with 50wt.% silicon (Si) were prepared by liquid phase hot pressing. Elemental copper (Cu) powder was mechanically mixed with gas-atomized AlSi alloy powder to form partial liquid phase during sintering, and its effect on densification, microstructure and mechanical properties was investigated. The results indicate that the amount of precipitated Al2Cu (θ)...
The Al–(22–50wt.%) Si alloys are prepared by hot pressing of gas atomized Al–Si alloy powder. The microstructures, mechanical properties, physical properties, and fracture surfaces of the alloys are characterized as a function of the Si content. All the alloys are well densified with pore-free microstructure and homogeneously dispersed Si phase that is refined in size and has smooth surface. The mechanical...
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