遷移的液相焼結法によるアルミナ粒子分散Al-4.5%Cu合金複合材料の製造

Production of Al2O3 particle/Al–4.5 mass%Cu alloy composite was attempted by the transient liquid phase (TLP) sintering in hot pressing. As a result, the CuAl2 (θ-phase), which formed finely and continuously at the grain boundary in the Al–4.5 mass%Cu alloy, disappeared by the addition of Al2O3 particle. The mechanical properties of the TLP-sintered composites were superior to those of solid-phase-sintered composites. It is clear that the bonding strength between Al2O3 particle and matrix exerts a great effect on the tensile strength of the TLP sintered composites. The sintering process of Al2O3/Al–4.5mass%Cu mixed powder by TLP sintering was accelerated compared with that by solid phase sintering. From the experimental results mentioned above, TLP sintering was confirmed to be effective to produce metal matrix composites.