INFLUENCE OF PURIFICATION ON GLASS FORMABILITY AND THERMOSTABILITY OF METALLIC GLASS Ni_(75)B_(17)Si_8

The kinetics of electrochemical reaction of Nd~(3+) reduced on liquid Ga electrode has been studied by cyclic voltammetry (CV) in molten chloride at 1073K. The results show that the reduction of Nd~(3+)? on Ga electrode proceeds in consequent two steps. For the first step, it is found to be a diffusion controlled reversible re- action at higher rate of potential scan, i. c., Nd~(3+)+e=Nd~(2+) and an irreversible rea- ction controlled by following chemical reaction at lower rate, i. c., Nd~(3+)+e?Nd~(2+) +mCl NdCl'_m~(-m). For the second step, alloying reaction of deposited Nd with Ga can be observed and the reaction is found to irreversible, Nd~(2+)+2e→Nd(Ga). The stand- ard rate constant of this reactiin is estimated to be 7.0×10~(-3) cm/s.