TY - JOUR
T1 - Thermodynamic properties of rare-earth alloys by electrochemical emf measurements
AU - Lichtenstein, Timothy
AU - Im, Sanghyeok
AU - Yu, Chen Ta
AU - Kim, Hojong
N1 - Publisher Copyright:
© 2020 Cambridge University Press. All rights reserved.
PY - 2020
Y1 - 2020
N2 - Thermodynamic properties of Nd-Bi and Nd-Sn alloys were determined via electromotive force (emf) measurements at 725-1075 K. The emf measurements of an Nd-Bi alloy at mole fraction xNd= 0.20 were conducted using a solid CaF2-NdF3electrolyte relative to pure Nd(s). The emf values from the CaF2-NdF3electrolyte were verified in separate experiments in molten LiCl-KCl-NdCl3where 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-NdCl3for emf measurements of Nd-Bi (xNd= 0.15-0.40) and Nd-Sn (xNd= 0.10) alloys. The emf measurements of these alloys were reproducible during thermal cycles over 50 h and were used to calculate thermodynamic properties, including the partial molar Gibbs energy, entropy, and enthalpy.
AB - Thermodynamic properties of Nd-Bi and Nd-Sn alloys were determined via electromotive force (emf) measurements at 725-1075 K. The emf measurements of an Nd-Bi alloy at mole fraction xNd= 0.20 were conducted using a solid CaF2-NdF3electrolyte relative to pure Nd(s). The emf values from the CaF2-NdF3electrolyte were verified in separate experiments in molten LiCl-KCl-NdCl3where 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-NdCl3for emf measurements of Nd-Bi (xNd= 0.15-0.40) and Nd-Sn (xNd= 0.10) alloys. The emf measurements of these alloys were reproducible during thermal cycles over 50 h and were used to calculate thermodynamic properties, including the partial molar Gibbs energy, entropy, and enthalpy.
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U2 - 10.1557/jmr.2020.218
DO - 10.1557/jmr.2020.218
M3 - Article
AN - SCOPUS:85091418752
SN - 0884-2914
JO - Journal of Materials Research
JF - Journal of Materials Research
ER -