Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-1745-C7-1748
AlCu-Al2O3 metal matrix composites studied by thermoelectric power measurementsL. PARRINI and R. SCHALLER
Ecole Polytechnique Fédérale de Lausanne, Institut de Génie Atomique, 1015 Lausanne, Switzerland
Metal matrix composite materials Al-4%Cu reinforced with different volumetric fractions of Al2O3 (Saffil) fibers were produced by "squeeze casting". The composites were characterized by thermoelectric power measurements, in order to identify the effect of the fibers on the precipitation of Cu and the microstructure of the alloy. The formation of Guinier-Preston zones was found to be slowed down by the presence of fibers, while the formation of θ' precipitates was favoured in the composites. A TTT diagram of Cu precipitation in the composites was drawn, which well characterized their different response to ageing compared to that of the unreinforced matrix.
© EDP Sciences 1993