Equilibria E 4000Phase Diagram of the Sn-Zn-Ti System. -The 600°C isothermal section of the phase diagram of the title system is constructed using data of equilibrated alloys and diffusion couples. A new compound of approximate composition Ti3Sn2Zn6 is identified by SEM, metallography, and DSC. The crystals of this new phase exhibit hexagonal shape. -(VASSILEV*, G. P.; DOBREV, E. S.; TEDENAC, J.-C.; J. Alloys
Abstract. The Ag-Sn system is among the most studied ones in the prospective of the abandon of the lead containing alloys. On the other hand the temperatures of these alloys are higher than those of the now used Pb-Sn eutectic alloys. Consecutively the addition of In -a low melting element is interesting from the new materials' development. The isothermal section of the Ag-Sn-In system at 280 o C was studied by using optical and scanning electron (SEM) microscopies, X-ray diffraction, differential scanning calorimetry (DSC) and Vickers' microhardness measurements. The microhardness values of (Ag), (Ag 4 Sn) and phases were measured. The ternary eutectic's position reported in the literature was confirmed. The respective third element's solubilities were determined.Résumé. Le système Ag-Sn est parmi les systèmes les plus étudiés dans la perspective de l'abandon des alliages à base de Pb. D'autre part les températures de fusion de ces alliages sont plus élevées que celle de l'eutectique Pb-Sn actuellement employé. Consécutivement, l'addition d'indium, un élément ayant température de fusion relativement basse, est un moyen intéressant pour la mise au point de nouvelles brasures. L coupe isotherme du système Ag-Sn-In à 280 o C a été construite à l'aide des microscopies optique et électronique à balayage (MEB), de la diffraction des rayons X, de mesures de microdureté Vickers et de calorimétrie différentielle à balayage (DSC). Les microduretés des phases (Ag), (Ag 4 Sn) et ont été mesurées. La position de l'eutectique ternaire rapportée antérieurement dans la littérature a été confirmée. Les solubilités du troisième élément respectif ont été déterminées.
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