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Dependent Thermo-Mechanical Behavior of Novel Alumina-Based Refractories
A. Böhm1, C.G. Aneziris2, J. Malzbender1
1 Institute of Energy and Climate Research - 2, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse, D-52425 Jülich, Germany
2 Institute of Ceramic, Glass and Construction Materials, TU Bergakademie Freiberg, Agricolastrasse 17, D-09596 Freiberg, Germany
received January 29, 2014, received in revised form April 28, 2014, accepted May 6, 2014
Vol. 5, No. 2, Pages 167-171 DOI: 10.4416/JCST2014-00001
Abstract
Novel alumina-based refractories were assessed with regard to their thermo-mechanical behavior from room temperature to 1000 °C within the framework of the DFG SPP "FIRE" program. These refractories are being developed for use in slide gates or entry nozzles. Their elastic behavior was investigated with the impulse excitation technique. Wedge splitting tests were used to determine their fracture resistance behavior. The evaluated material characteristics and thermal shock resistance were compared to those of a standard refractory material, permitting conclusions to be drawn regarding the effect of the additives used (TiO2, ZrO2) on apparent elastic behavior, crack propagation and thermal shock resistance.
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Keywords
Refractories, ceramics, elastic modulus, fracture, thermal shock
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