Mechanical Properties and Fracture Characterization of Al-5%wtMg Composite Reinforced with Carbon Nanotube

Abstract:

High-Energy Ball Milling was used to disperse carbon nanotubes (CNTs) in Al-5wt%Mg matrix and hot-pressing were used to consolidate the composite powders with different CNTs contents. The results showed that a certain weight of CNTs can be homogeneously dispersed in the matrix through the high-energy ball milling, the most of CNTs are embedded in the Al-5wt%Mg matrix and have a close bonding with the Al-5wt%Mg matrix. In addition, CNTs can play the role of grinding aids to prevented agglomeration of particles. Tensile strength and hardness of the CNTs/Al-5wt%Mg composites increase by 47.9% and 37.25% respectively when the CNTs was 2wt% in the Al-5wt%Mg composites. The fracture surfaces of the composite with 2wt% CNTs involved in the pulling out and breakage of CNTs. In this case, both Orowan looping and load transfer were proved to be the strengthening mechanisms of the CNTs/ Al-5wt%Mg composites.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 186-190
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.186
• Online since: August 2013
• Authors: Ya Guang Chen*, Xiao Lan Cai, Hong Peng Sun, Gang Le, Cui Hu
• Keywords: Al Matrix Composite, Carbon Nanotube (CN), Fracture Surfaces, High-Energy Ball Milling, Mechanism

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