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Carbon nanotube(CNT)-reinforced AZ91 D alloy composite was fabricated by ultrasonic processing.The microstructure and mechanical properties of the CNTs/AZ91 D composites were investigated.Obvious grain refinement was achieved with the addition of 0.5 wt%CNTs.The SEM observation indicated that CNTs were distributed near the grain boundary or around the inter-grain β-Mg_(17)Al_(12) phase.No evident reaction product was found at the interface between CNTs and AZ91 D matrix.Compared to the monolithic AZ91 D alloy,the yield strength,ultimate tensile strength,and elongation of the 0.5 wt%CNTs/AZ91 D composite were improved significantly.However,the poor interface bonding between CNTs and AZ91 D matrix restricted further improvement in mechanical properties.
Carbon nanotube (CNT) -reinforced AZ91 D alloy composite was fabricated by ultrasonic processing. Microstructure and mechanical properties of the CNTs / AZ91 D composites were observed. Obvious grain refinement was achieved with the addition of 0.5 wt% that CNTs were distributed near the grain boundary or around the inter-grain β-Mg 17 Al 12 phase. No apparent reaction product was found at the interface between CNTs and AZ91 D matrix. Compared to the monolithic AZ91 D alloy, the yield strength, ultimate tensile strength, and elongation of the 0.5 wt% CNTs / AZ91 D composite were significantly increased.However, the poor interface bonding between CNTs and AZ91 D matrix restricted further improvement in mechanical properties.