作者：B. Gutbrod, N. Travitzky, A. Richter, M. GObbels, P. Greil

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刊名：refractories worldforum

ISSN：

出版年：2012-04-01

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期：4

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语种：英文

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内容简介

Multilayer oxide ceramics of variable compositions were fabricated from preceramic paper to substitute carbon-bonded refractory. Alternating layers of Zr02 Al2O3-ZrO2 and Al2O3-Mg Al2O4 preceramic paper were bonded with a zirconia based interface adhesive layer and co-sintered at 1700°C. The porous multilayer refractory structures were exposed to an industrial CaO-Fe2O3-SiO2-slag melt at 1390°C and the corrosion degradation mechanisms were analyzed. Progression of the corrosion zone is dominated by a layer-by-layer infiltration and dissolution reaction process. Zirconia laminates were found to exhibit superior corrosion resistance. Enhanced dissolution of interface layers was observed in the alumina-zirconia system. A pronounced volume expansion effect caused accelerated degradation in the alumina-spinel based system. Zr02 based interface bonding layers of lower porosity compared to the preceramic paper derived ceramic layers may improve corrosion resistance. Manufacturing of multilayer refractory structures from preceramic paper of various compositions offers high flexibility in stacking design optimization in order to adopt corrosion resistance to local environmental conditions.