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  • 1 Université de Toulon et du Var Laboratoire de Physico-Chimie du Matériau et du Milieu Marin, Matériaux ŕ Finalité Spécifique (E.A. 1356) B.P. 132 83957 La Garde Cedex France B.P. 132 83957 La Garde Cedex France
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Abstract  

The Al–Ga–Zn ternary phase diagram presents two isobaric invariant reactions: a eutectic at 231C and a metatectic at 1231C [1–3]. Calorimetric measurements on the two isobaric invariant reactions have been carried out. First the Tammann method has enabled us to determine the composition of their limits on five isopletic cross sections. Then, the compositions of the invariant phases have been determined.