The Kinetics and Thermodynamics of Oxygen in Nickel, Palladium, and Niobium-Vanadium Solid Solutions (Diffusion, Solubility, Electrochemistry)

Solid-state electrochemical measurements using alternative experimental procedures were made with the double cell Ni + NiO(VBAR)ZrO(,2) + Y(,2)O(,3)(VBAR)Ni or Pd(VBAR)ZrO(,2) + Y(,2)O(,3)(VBAR)Ni + NiO to determine the kinetic and thermodynamic functions of oxygen in solid nickel and palladium. Non-steady state diffusion of oxygen in the specimen was caused by applying a preselected potential between the reference and specimen electrodes and was monitored by measuring time-dependent potentials and/or currents. The following results were obtained for the diffusivities and terminal solubilities of oxygen in nickel and palladium: D (Ni) = 4.9 x 10('-2) exp(-((164 kJ/mole)/RT)) cm('2)/sec (850-1400(DEGREES)C); C(,o)('s) (Ni) = 9.1 exp(-((56 kJ/mole)/RT)) at% (800-1000(DEGREES)C); D (Pd) = 1.03 x 10('-5) exp(-((98 kJ/mole)/RT)) cm('2)/sec (900-1150(DEGREES)C); C(,o)('s)(Pd) = 5.4 x 10('-2) exp(-((117 kJ/mole)/RT)) at% (900-1150(DEGREES)C).

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Metallurgical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Park, Jong-Wan

• Engineering, Metallurgy

Identifier

(UMI)AAI8511656

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/71818