The experimental study of the Bi-Sn, Bi-Zn and Bi-Sn-Zn systems

• Type: Article in International Scientific Journal
• Date: 2007

Authors

M.H. Braga (Author) FEUP; J. Vizdal (Author) Other; A. Kroupa (Author) Other; Delfim Soares (Author) Other; J. Ferreira (Author) Other; L. F. Malheiros (Author) FEUP

Journal

Title: Calphad: Computer Coupling of Phase Diagrams and Thermochemistry

Vol. 31 No. 4

Pages: 468-478

ISSN: 0364-5916

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 53 Citations

ISI Web of Science

Scopus - 54 Citations

COMPENDEX

INSPEC

Scientific classification

FOS: Natural sciences > Physical sciences

CORDIS: Physical sciences > Physics

Other information

Authenticus ID: P-004-5W7

Abstract (EN): The binary Bi¿Sn was studied by means of SEM (Scanning Electron Microscopy)/EDS (Energy-Dispersive solid state Spectrometry), DTA (Differential Thermal Analysis)/DSC (Differential Scanning Calorimetry) and RT-XRD (Room Temperature X-Ray Diffraction) in order to clarify discrepancies concerning the Bi reported solubility in (Sn). It was found that (Sn) dissolves approximately 10 wt% of Bi at the eutectic temperature. The experimental effort for the Bi¿Zn system was limited to the investigation of the discrepancies concerning the solubility limit of Zn in (Bi) and the solubility of Bi in (Zn). Results indicate that the solubility of both elements in the respective solid solution is approximately 0.3 wt% at 200 C. Three different features were studied within the Bi¿Sn¿Zn system. Although there are enough data to establish the liquid miscibility gap occurring in the phase diagram of binary Bi¿Zn, no data could be found for the ternary. Samples belonging to the isopleths with w(Bi)  10% and w(Sn)  5%, 13% and 19% were measured by DTA/DSC. The aim was to characterize the miscibility gap in the liquid phase. Samples belonging to the isopleths with w(Sn)  40%, 58%, 77/81% and w(Zn)  12% were also measured by DTA/DSC to complement the study of Bi¿Sn¿Zn. Solubilities in the solid terminal solutions were determined by SEM/EDS. Samples were also analyzed by RT-XRD and HT-XRD (High Temperature X-Ray Diffraction) confirming the DTA/DSC results for solid state phase equilibria.

Language: English

Type (Professor's evaluation): Scientific