Abstract
In this study, in situ 50 vol.-% TiCx/2014Al composites with different C/Ti molar ratios (0.6, 0.7, 0.8, 0.9 and 1) were successfully produced by the method of combustion synthesis and hot press consolidation. The microstructure and the mechanical properties of the composites were investigated. Microstructure characterisation of the TiCx/2014Al composites showed relatively uniform distribution of the TiCx particles with the particle size in the range of 200–900 nm. With the increase of the C/Ti molar ratio, the yield strength (σ0.2) and the ultimate compression strength (σUCS) increased first then decreased, and the fracture strain (εf) increased. The σ0.2, σUCS and the abrasive wear resistance of the 50 vol.-% TiCx/2014Al composites reached the highest value when the value of the C/Ti molar ratio comes to 0.8. The σ0.2, σUCS and εf of the 50 vol.-% TiCx/2014Al composites with the C/Ti molar ratio of 0.8 are 1094 MPa, 1454 and 6.13%, respectively.
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