In situ electrochemical etching and examination by SPM of titanate ceramics
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Date
2002-02-04
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Australian Society for Electron Microscopy
Abstract
The aqueous durability of titanate related ceramics is of great importance for the immobilisation of high level radioactive waste-in order to observe the reaction progress at the solid-liquid interface of these durable ceramics, we have attempted to accelerate the dissolution process via electrochemical means by using a SPM cell with electrochemical capability. The experiment involves placing a titanate ceramic disk (with flat polished surfaces) in the electrochemical cell. The cell is then set up with the ceramic acting as one electrode and another electrode being placed in the solution. In a flow through cell it is possible to select the pH and observe the change, not only in surface morphology as dissolution occurs, but also the frictional characteristics of the surface. The SPM tip plays no role in the electrochemical reaction. We will be presenting results from our work and discussing possible mechanisms for dissolution and future directions of the work. ©2002 Australian Society for Electron Microscopy Inc
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Keywords
Ceramics, Dissolution, Electrochemical cells, Electrochemistry, Etching, Interfaces, pH value, Titanates
Citation
Thorogood, G. J., Short, K. T., & Zhang, Y. (2002). In situ electrochemical etching and examination by SPM of titanate ceramics. Presentation to the ACEM17 : 17th Australian Conference on Electron Microscopy, Adelaide Convention Centre, Adelaide, South Australia, 4th - 8th February 2002. In Terlet, J. & Dayman, M. (eds), ACEM17 : 17th Australian Conference on Electron Microscopy, Adelaide Convention Centre, Adelaide, South Australia, 4th - 8th February 2002, (pp. 77).