Abstract
Al-Cr/Al composites were fabricated by ultrasonic vibration assisted. Then the reinforced phase were characterized by XRD and EDS, the reinforcement particle size, morphology and distribution were observed by the use of SEM, and studied on the bending property of the composite material. The result shows that, Al and Cr generate inter-metallic compounds of Al0.983Cr0.017, Al5Cr, -Al8Cr5, -AlCr2, etc. The enhance particles, appear irregular polygonal shape, smaller particles diameter, distribute in the matrix uniformly. And the enhance particles and the matrix get good bond, clean interface, non-pollution. The bending strength bb of the composites is decline as increasing Cr content. It is easy to form stress concentration at the interface. Inter-metallic compounds grain are not easy to slip under external load force, reinforcing particles and the matrix are easy to suddenly fall off, so, composites have a greater brittle.
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