Contribution of solid electrochemical techniques to high temperature oxidation studiest^†

Abstract

Solid electrochemical techniques have been applied to high temperature oxidation studies in experiments and concept. The principles of the parabolic oxidation law and solid electrolyte cells have been derived from the same origin developed by Carl Wagner. Oxygen sensors and pumps using solid electrolyte cells are very useful for the study of oxidation kinetics as a function of oxygen partial pressure. A tip-type solid electrolyte CO₂ sensor is very sensitive to detect the evolution of CO₂ gas, and is useful for the analysis of high temperature oxidation of metal carbides. A mechanistic model proposed for the reactive element effect of chromia-forming alloys has been confirmed by the measurements and data analysis of thermodynamic properties, electrical conductivity and diffusivity of YCrO₃ on the basis of solid electrochemical techniques and defect structures.

Keywords:

• solid electrochemical techniques
• high temperature oxidation studies
• defect structures

Notes

† First published in the proceedings of High-Temperature Corrosion and Protection 2000