Melt structure of Bi₂₀Sb₈₀ alloy and its effect on the solidification

ABSTRACT

In this article, the temperature dependence of electrical resistivity (ρ-T) of Bi₂₀Sb₈₀ alloy was investigated by DC four-probe method. The results showed that there were two kinds of liquid–liquid structure transition (L-LST) in liquid Bi₂₀Sb₈₀ alloy, one was irreversible at high temperature above the liquids (815–1069°C) and the other was reversible near the melting point (600–720°C). The anomalous points on differential scanning calorimetry curve matched well with that on ρ-T curve which verified the effectiveness of the resistivity experiment. L-LST of high temperature refined the solidification organisation of Bi₂₀Sb₈₀ alloy to a certain extent.

KEYWORDS:

• Bi₂₀Sb₈₀ alloy
• resistivity
• liquid–liquid structure transition
• solidification organisation

Acknowledgment

The authors would like to acknowledge the National Natural Science Foundation of China [51271087, 51471076 and 51401085] with this work.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51271087, 51471076 and 51401085].