AbstractsEngineering

The influence of composition, processing and temperature on the Young's modulus of elasticity of carbon-bonded refractories

by Jörn Werner




Institution: TU Bergakademie Freiberg
Department: Maschinenbau, Verfahrens- und Energietechnik
Degree: PhD
Year: 2014
Record ID: 1100442
Full text PDF: http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-155296


Abstract

Thermal shock resistance is a key property of refractory materials. Its determination and prediction is essential for the design of structural refractories as well as lining materials. Young’s modulus of elasticity (E) is a crucial parameter for the calculation of thermal shock resistance. For all investigated carbon-bonded alumina composition a significant increase of E was observed. This increase was attributed to a mismatch of the coefficient of thermal expansion of the composite constituents. Besides others, the graphite content as well as the maximum alumina particle size were identified as crucial factors influencing E(T). Furthermore, the influence of the porosity on E was shown and existing models were fitted to the experimental data for future predictions of E. Finally a metal melt filter structure was investigated to investigate the relationship between its strut Young’s modulus and the structures’ E at high temperatures. Further research should address the filter topic since it was uncertain how to find the normal modes of those structures.