Formation of Supersaturated Solid Solutions Bi-Ag and Bi-Zn by Rapid Solidification Using Melt Spinning Technique

Tarek El-Ashram^1,2

¹Physics Department, Faculty of Science, Port Said University, Port Said, Egypt.
²Physics Department, Preparatory Year Deanship, Jazan University, Jazan, KSA.

DOI: 10.4236/msa.2015.62021                

Abstract

Two eutectic alloys Bi-Ag and Bi-Zn were rapidly solidified using melt-spinning technique. X-ray diffraction analysis (XRD), differential scanning calorimetry (DSC), and temperature dependence of resistivity (TDR) were performed. The solid solubility of both Ag and Zn was extended to the eutectic concentration due to rapid solidification by melt spinning technique and both alloys are single-phase solid solutions. The addition of Ag extended the unit cell in both a and c directions keeping the axial ratio c/a without change, and in case of Zn addition, the unit cell was increased in a direction and decreased in c direction leading to the decrease in the axial ratio c/a. The Bi-Ag eutectic alloy exhibited a semiconducting behavior with energy gap of 280 meV, while Bi-Zn eutectic alloy exhibited metallic behavior.

Keywords

Rapid Solidification (RS), Crystal Structure, X-Ray Diffraction Analysis (XRD), Solid Solubility, Semiconducting Behavior, Bi-Ag, Bi-Zn

Conflicts of Interest

The authors declare no conflicts of interest.

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