TITLE:
Formation of Supersaturated Solid Solutions Bi-Ag and Bi-Zn by Rapid Solidification Using Melt Spinning Technique
AUTHORS:
Tarek El-Ashram
KEYWORDS:
Rapid Solidification (RS), Crystal Structure, X-Ray Diffraction Analysis (XRD), Solid Solubility, Semiconducting Behavior, Bi-Ag, Bi-Zn
JOURNAL NAME:
Materials Sciences and Applications,
Vol.6 No.2,
February
12,
2015
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.