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Fabrication and properties of in-situ Al/AlB2 composite reinforced with high aspect ratio borides

  • Kayikci, Ramazan (Sakarya University, Faculty of Technology) ;
  • Savas, Omer (Yildiz Technical University, Naval Architect and Marine Engineering Faculty)
  • Received : 2014.10.01
  • Accepted : 2015.02.13
  • Published : 2015.09.25

Abstract

Production and properties of metal matrix composites reinforced with an in-situ high aspect ratio $AlB_2$ flake have been investigated. Boron 2.2wt.% was dissolved in pure Al and Al-Cu alloy at $1300^{\circ}C$ by adding directly boron oxide which resulted in 4 vol.% reinforcing phase. The in-situ $AlB_2$ flake concentration was increased up to 30 vol.% in order to increase the tensile strength of the composites. Hardness, compressive strength and tensile strength of the composite were measured and compared with their matrix. Results showed that 30 vol.% $AlB_2/Al$ composite show a 193% increase in the compressive strength and a 322% increase in compressive yield strength. Results also showed that ductility of composites decreases with adding $AlB_2$ reinforcements.

Keywords

Acknowledgement

Supported by : Technological Research Council of Turkey (TUBITAK)

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