Techno Press

Steel and Composite Structures   Volume 19, Number 3, September 2015, pages 777-787
Fabrication and properties of in-situ Al/AlB2 composite reinforced with high aspect ratio borides
Ramazan Kayikci and Ömer Savaş

Abstract     [Full Text]
    Production and properties of metal matrix composites reinforced with an in-situ high aspect ratio AlB2 flake have been investigated. Boron 2.2wt.% was dissolved in pure Al and Al-Cu alloy at 1300°C by adding directly boron oxide which resulted in 4 vol.% reinforcing phase. The in-situ AlB2 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.% A1B2/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 AlB2 reinforcements.
Key Words
    AlB2 composite; boron oxide; aluminum boride; in-situ composite
(1) Ramazan Kayikci:
Sakarya University, Faculty of Technology, 54187, Sakarya, Turkey;
(2) Ömer Savaş:
Yıldız Technical University, Naval Architect and Marine Engineering Faculty, 34349, Istanbul, Turkey.

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