Microstructure and Mechanical Properties of Al2024-SiC Nanocomposites


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Karabacak A. H. , Çanakçı A. , Varol T. , Erdemir F.

1. INTERNATIONAL TECHNOLOGICAL SCIENCES AND DESIGN SYMPOSIUM, Giresun, Türkiye, 27 - 29 Haziran 2018, ss.788-797

  • Basıldığı Şehir: Giresun
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.788-797

Özet

In this work, Al2024-SiC nanocomposites with different amount of SiC were produced by mechanical alloying method

and hot pressing method. Al2024-SiC mixtures were milled with 8 hours in planetary ball mill under argon atmosphere

at room temperature. To investigate the effect of SiC content on the properties of nanocomposites, the SiC content was

changed 0, 1, 1.5, 2, 2.5 to 3 wt%. Than the milled powders were hot pressed at 560 0C for 3 hours under 500 MPa

pressure to obtain the final samples. The change of microstructure, hardness, bending strength and tensile strength of

Al2024-SiC nanocomposites with increasing SiC content were investigated. The uniform distribution, dispersion of

SiC nano particles within the Al2024 matrix and fracture surfaces was examined by scanning electron microscopy

(SEM). A maximum bending strength and tensile strength was obtained for 2 wt.% SiC reinforced Al2024 matrix

nanocomposites. It was observed that the changes in hardness were conferred in relation to the SiC content. The results

show that the increase in hardness values and reinforcement content plays a major role on the improvement of

mechanical properties of the nanocomposites.

Keywords: Mechanical alloying, SiC, Nanocomposites, Microstructure, Strength.