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During the solidification of a discontinuously reinforced metal matrix composite, the solidifying alloy interacts with the particulate reinforcement to either push the particles into the last freezing, interdendritic regions or engulf them in the solidified dendrites.
Metal matrix composites have been manufactured by various techniques such as powder metallurgy, spray deposition and several casting methods such as rheocasting, squeeze-casting, stir-casting and compo-casting, but there exist some challenges in manufacturing the discontinuously reinforced metal matrix composites.