Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
795738 | Journal of Materials Processing Technology | 2007 | 5 Pages |
Microstructures and mechanical properties of Al–Cu matrix composites reinforced by in situ TiB2 and Al2O3 particulates have been investigated in this paper. Result of XRD analysis indicates that the (Al2O3 + TiB2)/Al–Cu composites can be fabricated with the direct melt reaction method. Analysis in SEM shows that TiB2 particles distribute along the grain boundaries and interweave with CuAl2 phase; while Al2O3 particles have a tendency to agglomeration. The interfaces between reinforcements and matrix in as-cast composites are clean. From the investigations on mechanical properties of composites, we deduce that the UTS and hardness of as-cast or T6-treated (TiB2 + Al2O3)/Al–Cu composites are obviously higher than those of composites reinforced with the same percentage reinforcements of TiB2 or Al2O3 particles.