Materials Processing Fundamentals: Poster Session
Sponsored by: TMS Extraction and Processing Division, TMS Materials Processing and Manufacturing Division, TMS: Process Technology and Modeling Committee
Program Organizers: Samuel Wagstaff, Oculatus Consulting; Alexandra Anderson, Gopher Resource; Jonghyun Lee, Iowa State University; Adrian Sabau, Oak Ridge National Laboratory; Fiseha Tesfaye, Metso Outotec Finland Oy

Monday 5:30 PM
February 28, 2022
Room: Exhibit Hall C
Location: Anaheim Convention Center

F-33: Phase Equilibria in the Ag–Ge–Bi–Te System and Thermodynamic Properties of the nGeTe×mBi2Te3 (n, m = 1-4) Layered Compounds: Mykola Moroz1; Fiseha Tesfaye2; Pavlo Demchenko3; Myroslava Prokhorenko4; Orest Pereviznyk3; Bohdan Rudyk1; Lyudmyla Soliak1; Daniel Lindberg5; OLeksandr Reshetnyak3; Leena Hupa2; 1National University of Water and Environmental Engineering; 2Åbo Akademi University; 3Ivan Franko National University of Lviv; 4Lviv Polytechnic National University; 5Aalto University
    Phase equilibria of the Ag–Ge–Bi–Te system in the part GeTe–Ag8GeTe6–Te–Bi2Te3 (I) were established by means of electrochemical investigation and characterization techniques. It was shown that the concentration space of (I) consists 8 four-phase regions, formed with the participation of the layered compounds of the nGeTe×mBi2Te3 (n, m = 1-4) homologous range, as well as Ag8GeTe6, Bi2Te3, and Te. Equations of potential-forming reactions were written for each region. Reactions were performed in the following electrochemical cells (ECCs) (−)IE | Ag | SE | PE | IE(+), where IE is the inert electrode, Ag is the negative electrode, SE is the solid-state Ag+ ion conducting electrolyte, and PE is the positive electrode. PEs of ECCs were prepared from finely ground mixtures of the elements. The measured EMF vs temperature values of ECCs were used to calculate the standard thermodynamic functions of intermetallic compounds in (I).