Characterization of Boron Carbide (B4C) particle reinforced aluminium metal matrix composites fabricated by powder metallurgy

●      Aluminium matrix phase was perfectly suitable for major rein-forcement particles increasing the properties above its base alloy irrespective of fabrication techniques ●      B4C is the one of the best and hardest reinforcement while choosing the reinforcement particles. ·   From the studies it is clear that compared to micro Nano level reinforcements give superior results but    Nano level reinforce-ments are more prone towards agglomerations and reactions. ●   In Al-B4C system majorly formed intermetallic compounds are AlB2, Al3BC, Al3B48C2. ●   Compared to conventional sintering techniques modern sinter-ing techniques like microwave sintering and spark plasma sin-tering shows better results in Al-B4C system. ●   It is clearly observed that increasing the volume fraction of B4C results in decrease in strain to fracture values, increase in hard-ness and increase in mechanical strengths up to critical volume fractions. ●   B4C critical volume fractions in matrix phase was varying depending upon the parameters selected those are particle size, volume fractions, compaction pressures, sintering time and temperatures. ●   Added B4C reinforcements helps in strengthening of composite by inducing dislocation strengthening mechanisms by obstruct-ing dislocation mobilities at interface Concluding that B4C was one of the best ceramic hard reinforce-ments in Aluminium ductile matrix phase exhibiting superior mechanical properties compared to base alloys, still lot of research needed to investigate and understand the interface chemistry of Al-B4C system so that good interface bonding can be achieved which helps in exceptional composite properties by eliminating

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