Preparation and Squeeze Casting of Nano-SiCP/A356 Composite Assisted with Ultrasonic Vibration Process

Shu Lin Lü; Pan Xiao; Shu Sen Wu; Xiao Gang Fang

doi:10.4028/www.scientific.net/MSF.879.1188

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HomeMaterials Science ForumMaterials Science Forum Vol. 879Preparation and Squeeze Casting of Nano-SiCP/A356...

Preparation and Squeeze Casting of Nano-SiC_P/A356 Composite Assisted with Ultrasonic Vibration Process

Abstract:

Metal matrix nanocomposites (MMNCs) have excited great interest in recent years, due to their very good properties. In this work, an efficient process by combining high-energy ball milling (HBM) with ultrasonic vibration (UV) was employed to prepare MMNCs. The composite granules containing nanoSiC_P were produced by milling the nanoSiC and Al powders, and then were remelted in the matrix melt and treated by UV to prepare MMNCs. The MMNCs were finally formed by squeeze casting. The results indicate that globular nanoSiC_P/Al compound granules with diameters between 1.5-2mm are obtained by dry HBM, and the nanoSiC particles are uniformly distributed in the granules. After remelting, nanoSiC particles in compound granules release in the matrix melt and are uniformly dispersed by UV within 2min. In MMNCs, nanoSiC particles concentrate mainly around eutectic phases, but no agglomeration is observed. The tensile strength of the MMNCs with 1wt.% nanoSiC_P is increased by 19%, compared to the matrix A356 alloy.

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Periodical:

Materials Science Forum (Volume 879)

Pages:

1188-1193

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.879.1188

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Online since:

November 2016

Authors:

Shu Lin Lü, Pan Xiao, Shu Sen Wu*, Xiao Gang Fang

Keywords:

Al Matrix Nanocomposites, High-Energy Ball Milling, Mechanical Properties, Nano-SiC Particles, Ultrasonic Vibration

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