Al 2O 3f/Al-4.5Cu composites were made by squeeze casting. The effect of cooling rate on solute segregation in composites was studied. The results indicate that the primary crystal of Al-4.5Cu alloy nucleates and grows in the interstice between fibers. The fiber surface can not serve as site for heterogeneous nucleation of α primary dendrite. In the composite exists the increasing copper concentration gradient from the center of the interstice between fibers to the interface or the grain boundaries. Th...
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