Characterization of Al-Si-Mg/Al₂O₃ Nanocomposite Produced by Stir Casting Method

Abstract:

Al-Si-Mg reinforced with Al₂O₃ nano particles have been made by stir casting method. The vortex produced by stirrer is to distribute the Al₂O₃ nano particles in the molten aluminium. The volume fraction of Al₂O₃ nano particles was varied from 0.5, 1, 2, 3, to 5 Vf%, while the addition of magnesium was 3 Vf% as wetting agent to improve the wettability between Al₂O₃ nano particle and Al-Si-Mg matrix. The effect of Al₂O₃ on characteristic of Al-Si-Mg composites was studied. It is found that the presence of Al₂O₃ nano particle led to significant improve in mechanical properties, especially at addition of 0.5 Vf% Al₂O_3. The ultimate tensile strength reached to 154 MPa with 10.24 % elongation, while the hardness reached to 37.7 HRB followed by decrement in wear rate. The porosity level tend to increase with increasing of Al₂O₃ and caused decrement in mechanical properties.

• Periodical: Materials Science Forum (Volume 827)
• Pages: 294-299
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.827.294
• Online since: August 2015
• Authors: Anne Zulfia*, J. Salahuddin, Hafeizh E. Ahmad
• Keywords: Al-Si-Mg, Alumina, Aluminium, Mechanical Property, Nanocomposite, Vortex

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