Processing, Microstructure and Mechanical Properties of Hybrid Materials with Al-Mg Alloy and its Composites
The hybrid materials with Al-Mg alloy and its composites reinforced with SiC and Al2O3 particles were prepared by conventional powder metallurgy method. The Al-5wt%Mg and composite mixtures were compacted under a pressure of 400MPa and sintered at 873K for 5h. The obtained hybrid materials with Al-Mg/SiCp composite showed the higher relative density than those with Al-Mg/Al2O3 composite after compaction and sintering. In the composite side of hybrid materials, the SiC particles were densely distributed compared to the Al2O3 particles. The hybrid materials with Al-Mg/SiC composite showed higher micro-hardness than those with Al-Mg/Al2O3 composite. The mechanical properties were evaluated by the compressive test. The hybrid materials revealed almost the same value of 0.2% proof stress with Al-Mg alloy. However, their compressive strength was lower than that of Al-Mg alloy, resulting from the fracture occurring along the microinterface between matrix and reinforcements in the macro-interface.
Hyungsun Kim, Junichi Hojo and Soo Wohn Lee
H. G. Cho and S. Y. Chang, "Processing, Microstructure and Mechanical Properties of Hybrid Materials with Al-Mg Alloy and its Composites", Materials Science Forum, Vols. 544-545, pp. 435-438, 2007