The enthalpy of formation has been determined for the Al-Fe-Si solid soluti
on phases tau(6), tau(2), tau(3), tau(8), tau(4) with a Tian-Calvet calorim
eter (Setaram), by dissolution in an aluminium bath at 800 degrees C (1073
K). The single-phase alloys were prepared by levitation melting followed by
annealing. All alloys were investigated by X-ray diffraction and their pre
cise composition was determined by atomic absorption spectrometry. (C) 2000
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