A multiple-electrode cell with Y2O3-stabilized ZrO2 electrolyte is used to oxidize selected regions of a Ni-laminated disk by applying galvanostatic steps. Reaction kinetics were studied by examg. the chronopotentiometric curve assocd. with a given current step. The oxidn. rate and rate const. data are given for the temp. range 870-1100°, as well as the diffusion coeff. of Ni in NiO and elec. cond. values of the growing oxide scale. The activation enthalpy for oxidn. is given as a function of the O partial pressure and the activation enthalpies for the cond., and the diffusion processes are also reported. Some morphols. of the oxidized samples are shown, as obtained by SEM.
HIGH-TEMPERATURE KINETICS OF THE NICKEL OXYGEN REACTION BY CERAMIC ELECTROLYTE CELLS / Gozzi, Daniele; DE MARIA, G.. - In: HIGH TEMPERATURE SCIENCE. - ISSN 0018-1536. - STAMPA. - 22:1(1986), pp. 27-46.
HIGH-TEMPERATURE KINETICS OF THE NICKEL OXYGEN REACTION BY CERAMIC ELECTROLYTE CELLS
GOZZI, Daniele;
1986
Abstract
A multiple-electrode cell with Y2O3-stabilized ZrO2 electrolyte is used to oxidize selected regions of a Ni-laminated disk by applying galvanostatic steps. Reaction kinetics were studied by examg. the chronopotentiometric curve assocd. with a given current step. The oxidn. rate and rate const. data are given for the temp. range 870-1100°, as well as the diffusion coeff. of Ni in NiO and elec. cond. values of the growing oxide scale. The activation enthalpy for oxidn. is given as a function of the O partial pressure and the activation enthalpies for the cond., and the diffusion processes are also reported. Some morphols. of the oxidized samples are shown, as obtained by SEM.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
