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In this work Al-ZnO-Y 2 O 3  hybrid composites were fabricated utilizing powder metallurgy and hybrid microwave sintering approach from the powder blend of Al, ZnO and Y 2 O 3 . Depth sensing nano-indentation technique was adopted to assess the nano-hardness and elastic modulus of the composite material. Thermal analysis of the composite materials was done to gain an insight into surface decomposition and phase transformation behaviour. A strong interfacial bonding with clear interface between matrix and reinforcement was observed during the microstructural analysis of the composite material. The results of the current study exhibit ~89% improvement in the nano-hardness and ~11% improvement in the elastic modulus value. The improvement in the material response is attributed to the reasonably uniform distribution of ZnO and Y 2 O 3  in the hybrid composite materials. The results of this study validate the capability of combined presence of ZnO and Y 2 O 3  reinforcements to enhance the hardness and elastic modulus of aluminium.

Investigation on the combined effect of ZnO nanorods and Y 2 O 3 nanoparticles on the microstructural and mechanical response of aluminium