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        Microstructural and Mechanical Characterization of Hybrid Aluminum Matrix Composite Containing Boron Carbide and Al-Cu-Fe Quasicrystals

        Mahmood Khan,Muhammad Zulfaqar,Fahad Ali,Tayyab Subhani 대한금속·재료학회 2017 METALS AND MATERIALS International Vol.23 No.4

        Hybrid aluminum matrix composites containing particles of boron carbide and quasicrystals were manufactured toexplore the combined effect of reinforcements on microstructural evolution and mechanical performance of thecomposites. The particles were incorporated at a loading of 6 wt% each making a total of 12 wt% reinforcement inpure aluminum. For comparison, two composites containing individually reinforced 12 wt% particles were alsoprepared along with a reference specimen of pure aluminum. Ball milling technique was employed to mix the compositeconstituents. The green bodies of composite powders were prepared by uniaxial pressing at room temperaturefollowed by consolidation by pressureless sintering under inert atmosphere. The microstructural characterizationwas performed using scanning electron microscopy while phase identification was carried out by X-ray diffraction. The mechanical characterization was performed by Vickers hardness and compression tests. Hybrid compositesshowed increased compressive properties while the composites containing solely quasicrystals demonstratedimproved hardness. The increase in mechanical performance was related to the microstructural evolution due tothe presence and uniform dispersion of binary particles.

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