Al-Cu alloy Al-Cu alloys 1 Aluminum alloys 1 Binary alloys 1 Borides 1 Copper alloys 1 In-situ 1 In-situ metal matrix composites 1 In-situ techniques 1 Metallic matrix composites 1 Microstructure 1 Microstructure characterization 1 Potassium compounds 1 Potassium tetrafluoroborate 1 Properties and microstructures 1 Reinforcement 1 Salts 1 Salts route reaction 1 Titanium 1 Titanium diboride 1 Uniform distribution 1