Paper number 427

COMPARISON BETWEEN TI3AL AND NI3AL INTERMETALLICS USED AS REINFORCEMENTS IN ALUMINIUM ALLOY MMCS.

V. Amigó1, M. D. Salvador1, D. Busquets1, C. Ferrer1

1Departamento de Ingeniería Mecánica y de Materiales. Universidad Politécnica de Valencia Camino de Vera s/n, 46022-Valencia, Spain

Summary Aluminium matrix composites reinforced with intermetallics have appeared as very promising materials if a sound interface is achieved. This interface is dependant upon the possible reaction products and interphases that could appear due to the thermal processes implied during fabrication and/or posterior heat treatments, in case the matrix is a high strength heat-treatable alloy. The particulate reinforced aluminium matrix MMCs have been obtained by a combination of powder metallurgy technique and extrusion. This fabrication method guarantees both a good densification of the composite and a homogeneous distribution of the reinforcement in the matrix. Both 2000 and 6000 series aluminium alloys were used as matrix and Ni3Al and Ti3Al intermetallic particles as reinforcements.
Keywords aluminium matrix composite, intermetallics, heat treatment, interface, interphases, powder metallurgy, extrusion.

Theme : Metal Matrix Composites ; Interface and Interphase

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