Particle Distribution and Mechanical Properties of Nano-SiC_P/Al-Cu Composites

Abstract:

Generally it is difficult to disperse nanosized particles uniformly in metal matrix. In this paper nanoSiC particles reinforced Al-5%Cu matrix composites were prepared by molten-metal process, combined with high energy ball-milling and ultrasonic vibration methods. Ultrasonic vibration treatment (UV) has been successfully used to disperse the particles distribution of nanoSiC_p particles in the matrix. Big aggregates of particles are eliminated by the effects of cavitation and the acoustic streaming of UV for 1 min. All the particles aggregates are eliminated and the particles are uniformly distributed in the melt after treated by UV for 5 min. The refinement of Al₂Cu phase in Al-Cu alloy is more obvious and more uniform distributed with the increase of UV time. The ultimate tensile strength (UTS), yield strength and elongation of the 1wt% nanosized SiC_p/Al-5Cu composites treated by UV for 5 min are increased by 37%, 9.5% and 270% respectively, compared with the untreated composites.

• Periodical: Materials Science Forum (Volume 941)
• Pages: 2060-2065
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.941.2060
• Online since: December 2018
• Authors: Shu Sen Wu*, Jian Yu Li, Ping An, Shu Lin Lü
• Keywords: Al Matrix Composites (AMCs), Mechanical Properties, Particles Distribution, Sonication

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