Numéro
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-1745 - C7-1748
DOI http://dx.doi.org/10.1051/jp4:19937275
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-1745-C7-1748

DOI: 10.1051/jp4:19937275

AlCu-Al2O3 metal matrix composites studied by thermoelectric power measurements

L. PARRINI and R. SCHALLER

Ecole Polytechnique Fédérale de Lausanne, Institut de Génie Atomique, 1015 Lausanne, Switzerland


Abstract
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