Electrochemical Study on Formation of Dy-Ni Alloy in Molten Chlorides

Electrochemical Study on Formation of Dy-Ni Alloy in Molten Chlorides

The cyclic voltammetry, electrode potential-time curve after potentiostatic electrolysis, potential-step method and x-ray diffraction were used to study the electrochemical reaction of Dy (III) in NaCl-KCl equimolar mixture on Ni electrode. The DyNi sub 5 forms at first and then the intermetallic co...

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Veröffentlicht in:Rare metals 1996-10, Vol.15 (4), p.252-256
1. Verfasser: 童叶翔 刘冠昆 杨绮琴 洪惠婵 陈胜洋 甘罗
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alloy
Dy-Ni
Electrochemistry
NaCl-KCl-DyCl3
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description The cyclic voltammetry, electrode potential-time curve after potentiostatic electrolysis, potential-step method and x-ray diffraction were used to study the electrochemical reaction of Dy (III) in NaCl-KCl equimolar mixture on Ni electrode. The DyNi sub 5 forms at first and then the intermetallic compounds of Dy-Ni containing more Dy form in sequence. The metallic Dy deposits at last. The standard free energy of formation for DyNi sub 5 determined is -125.6 kJmultmol exp -1 at 973K. The diffusion coefficient of Dy into DyNi sub 5 phase determined is 8x10 exp -10 cm exp 2 mults exp -1 at 1032K. The diffusion energy of Dy atoms in the intermetallic compound is 101.3 kJmultmol exp -1 at 973K.
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subjects alloy
Dy-Ni
Electrochemistry
NaCl-KCl-DyCl3
title Electrochemical Study on Formation of Dy-Ni Alloy in Molten Chlorides
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