Application of diffusion couple technique for the determination of the Ti-Bi-Sn phase diagram by G. P. Vassilev

Crystal Research and Technology

Cryst. Res. Technol. 40, 713 (2005) - Abstract -

Application of diffusion couple technique for the determination of the Ti-Bi-Sn phase diagram

G. P. Vassilev

University of Sofia, Faculty of Chemistry, 1164 Sofia, Bulgaria

Keywords	transition metals alloys, intermetallics, phase diagram, layer growth
PACS	61.66.DK, 61.66.Fn, 68.55.Nq
DOI	10.1002/crat.200410414

The system Ti-Bi-Sn has been investigated by solid/liquid diffusion couples at 500, 600, 700 and 800°C. A non-negligible solubility of Sn into solid Bi is found. Diffusion layers of the recently revealed ternary compound Ti₃BiSn have been observed, thus its existence has been confirmed. Data about the homogeneity ranges of the binary end-system compounds have been obtained. The assessed growth constants of the diffusion layers are comprised in the interval 10^-12 –10^-14 m²^.s^-1. The phases participating in the hypothetical ternary eutectic reaction, probably are: (Bi), (Sn), Liquid and Ti₂Sn₃.

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