|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||High Temperature Electrochemistry IV
||Thermodynamic properties of Nd-Bi and Nd-Sn alloys by emf measurements
||Hojong Kim, Timithy Lichtenstein, Sanghyeok Im
|On-Site Speaker (Planned)
Electromotive force (emf) measurements of Nd-Bi alloy at mole fraction xNd = 0.20 were conducted at 725–1075 K relative to pure Nd(s) using three different electrolytes: molten LiCl-KCl-NdCl3, molten LiF-CaF2-NdF3, and a solid CaF2-NdF3 electrolytes. The emf values from the CaF2-NdF3 electrolyte were most reliable and reproducible during thermal cycles, and verified in separate experiments in molten LiCl-KCl-NdCl3 where pure Nd(s) was electrodeposited. The Nd-Bi (xNd = 0.20) exhibited two-phase behavior with a peritectic reaction (L + NdBi = NdBi2) at 926 K from differential scanning calorimetry. The two-phase Nd-Bi (xNd = 0.20) was employed as a stable reference electrode in molten LiCl-KCl-NdCl3 for emf measurements of Nd-Bi (xNd = 0.15–0.40) and Nd-Sn (xNd = 0.10) alloys to calculate the partial molar Gibbs energy, entropy, and enthalpy.