Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 32, Issue 11, Pages 2859-2866Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2011.12.005
Keywords
Corrosion; Spectroscopy; X-ray methods; ZrO2; Refractories
Categories
Funding
- DFG [Ni-299/21-1]
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We present first results of a study dealing with the corrosion of yttria stabilized zirconia ceramics by molten slags. Good wetting of a typical metallurgical slag as a pre-requisite for an effective chemical interaction of melt and zirconia was found. Both the dissolution of Zirconia and the leaching of the stabilizing agent into the molten slag are observed corrosion mechanisms. The latter induces a phase transformation from tetragonal or cubic zirconia into the: monoclinic modification. The transformation with its increase in volume by app. 5% induces cracks. Those act to give new pathways for the corrosive media, accelerating corrosion. Crucibles from Y-PSZ have been used as samples in experiments with various slags. We also demonstrate the use of cathodoluminescence microscopy as a powerful mapping tool for zirconia phase differentiation which was verified by Raman and XRD measurements. (C) 2011 Elsevier Ltd. All rights reserved.
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