Magnetic Pulsed Compaction and Pressureless Sintering of Aluminum Matrix Composite Reinforced by TiC Particles

Abstract

This study investigated the effects of magnetic pulsed compaction pressure and pressureless sintering conditions on the microstructure and mechanical properties of aluminum matrix composites. Al-10 vol.% TiC composites were fabricated using magnetic pulsed compaction under two different pressures (1.5 GPa and 3 GPa), followed by pressureless sintering under three conditions: 500°C for 2 h, 600°C for 1 h, and 600°C for 2 h. Phase analysis, density, microstructural characterization, and hardness measurements were conducted to evaluate and compare the properties of the fabricated specimens. The results showed that no new phases were formed during the sintering process in any of the specimens, and no significant differences in microstructure were observed. Specimens compacted at 3 GPa exhibited higher green density than those compacted at 1.5 GPa, and the relative density increased with higher sintering temperature and longer holding time. The hardness of the specimens showed a trend similar to that of density, with the specimen compacted at 3 GPa and sintered at 600°C for 2 h exhibiting the highest density and hardness.