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The microstructure and tensile properties of Al_4C_3 dispersion strengthened Al composite fabricatedby reaction milling technique were investigated.It is indicated that the rod-like Al_4C_3 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 Al_4C_3 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 Al_4C_3 dispersoids are distributed on the subgrain boundaries.The 11 vol.-%Al_4C_3/Al composite exhibits an UTS (ultimate tensile strength) of 400 MPa and anelongation-to-failure of 8.0%.
The microstructure and tensile properties of Al_4C_3 dispersion strengthened Al composite fabricated by reaction milling technique were investigated. It is indicated that the rod-like Al_4C_3 dispersoidshaving a diameter of 0.02-0.03 μm and a length of 0.1-0.3 μm are formed by reaction of C with Al, and uniformly distributed in the Al matrix. The interface between Al_4C_3 and Al is clean and the interfacial bonding is good. The matrix consists of the subgrains which have the size of 0.3-0.4 μm, and most of the Al_4C_3 dispersoids are distributed on the subgrain boundaries. The 11 vol .-% Al_4C_3 / Al composite exhibits an ultimate ultimate tensile strength of 400 MPa and annelongation-to-failure of 8.0%.