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http://dx.doi.org/10.12989/scs.2015.19.3.777

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)
Publication Information
Steel and Composite Structures / v.19, no.3, 2015 , pp. 777-787 More about this Journal
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
$AlB_2$ composite; boron oxide; aluminum boride; in-situ composite;
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