Diffusion couple studies of the Ti-Bi-Zn system by G. P. Vassilev

Crystal Research and Technology

Cryst. Res. Technol. 39, 763 (2004) - Abstract -

Diffusion couple studies of the Ti-Bi-Zn system

G. P. Vassilev

University of Sofia, Faculty of Chemistry, Boulvd. J. Bourchier 1, 1164 Sofia, Bulgaria

Keywords	transition metals alloys, intermetallics, phase diagram, layer growth
PACS	81.10.-h
DOI	10.1002/crat.200410251

The system Ti-Bi-Zn has been investigated using diffusion couples consisting of solid Ti and liquid (Bi+Zn) phase. The diffusion paths at 400, 500, 700 and 800°C have been traced by means of electron microprobe analyses. The growth constants of the diffusion layers are roughly assessed. The phase diagram data obtained in this investigation are compared with previous studies of equilibrated alloys. The existence of the ternary compound TiBiZn has been confirmed. The formation of another phase with approximate formulae Ti₄Bi₃Zn to Ti₉Bi₇Zn₄ has been observed at high temperatures. The latter compound as well as the ternary extension of the Ti_xBi_y (X~5, Y~6) phase react easily with air.

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