The microstructure and tensile properties of Al4C3 dispersion strengthened Al composite fabricatedby reaction milling technique were investigated.It is indicated that the rod-like Al4C3 dispersoidshaving a diameter of 0.02-0.03 μm and a length of 0.1-0.3μm are formed by reaction of C with Al,and uniformly distributed in the Al matrix.The interface between Al4C3 and Al is clean and theinterfacial bonding is good.The matrix consists of the subgrains which have the size of 0.3-0.4μm,and most of the Al4C3 dispersoids are distributed on the subgrain boundaries.The 11 vol.-%Al4C3/Al composite exhibits an UTS （ultimate tensile strength） of 400 MPa and anelongation-to-failure of 8.0%.
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