New Insights into Phase Equilibria of the Sb-Sn System

Abstract

A new experimental investigation of the Sb-Sn phase diagram has been performed. Special attention was focused on the phase equilibria within SbSn-Sb 3 Sn 4 composition range. Phase equilibria have been investigated by DSC measurements combined with a thorough optical and electronic microscopy examination with a special attention to the SbSn-Sb 3 Sn 4 phase transformation. Both DSC and metallographic results have been critically evaluated and debated. The presence of two peritectic reactions L ? Sb 3 Sn 4 (bSn) at 243 ± 1°C and L ? (Sb) (SbSn) at 420 ± 1°C have been confirmed. The invariant reaction at 321 ± 1°C has been observed and an additional small effect at about 330-340°C was systematically recorded. These results have been extensively discussed.

Thermodynamic Description of the Au-Sb-Sn Ternary System

“…Figure 2 shows the thermal analysis curves of Sb x Sn 1−x (x = 0.28, 0.32, 0.38) alloys at the heating rate of 5 K/min. A slow onset followed by an invariant effect appeared around 510.6-514.4 K with a clear kink before the peak at 516 K. The experimental results were in agreement with the reported data [29,37,49]. The temperatures of two peritectic reactions, L + Sb 3 Sn 4 ↔ bct (Sn) at 516 K and L + SbSn ↔ Sb 3 Sn 4 at 598 K, were determined.…”

“…The assessed results (except for the composition range of SbSn) of Jonsson et al [35] and Kroupa et al [36] are in general agreement with the calculated results of Ohtani et al [32]. The experimental Sb-Sn binary phase diagram [28][29][30]37] displays a contradiction to the decomposition of Sb3Sn4 at around 515 K. The experimental results determined by Chen et al [28] show that Sb3Sn4 is not decomposed and is stable at room temperature, which was accepted in the new edition of the phase diagram handbook [27]. Chen et al [28] optimized the Sb-Sn binary system considering the stable [18] with permission from Elsevier, 2011, and Dong et al [20] with permission from Elsevier, 2013.…”

“…Gierlotka et al [30] re-optimized the Sb-Sn binary system, based on the new experimental data [27]. Borzone et al [37] investigated the phase equilibria in the Sb 3 Sn 4 -SbSn composition range experimentally and confirmed the phase transitions related to Sb 3 Sn 4 . Lysenko [38] calculated the Sb-Sn binary system, including both Sb 2 Sn 3 and Sb 3 Sn 4 .…”

“…Recently, Zhang et al [31] re-assessed the Sb-Sn binary system. According to the experimental results [28][29][30]37], Sb 3 Sn 4 is stable at room temperature, which was considered in the present calculation of the Sb-Sn binary system. The experimental data determined in this work and reported in refs.…”

“…The experimental data determined in this work and reported in refs. [28,29,32,34,37] were highly valued in the optimization work.…”