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Fruhstorfer, J. ; Schafföner, Stefan ; Werner, J. ; Wetzig, T. ; Schöttler, L. ; Aneziris, C. G.:
Thermal shock performance of refractories for application in steel ingot casting.
In: Journal of Ceramic Science and Technology.
Bd. 7
(2016)
Heft 2
.
- S. 173-182.
ISSN 2190-9385
DOI: https://doi.org/10.4416/JCST2016-00010
Abstract
This study investigates the thermal shock performance of carbon-free and low-carbon-containing refractories, with and without nanoscale additives, based on alumina, mullite, and alumina doped with zirconia and titania (AZT). For this purpose, the porosity and cold modulus of rupture of the refractories before and after a single thermal shock by compressed air were determined. The mullite-matrix materials exhibited the highest porosities owing to restrained densification during sintering, but exhibited the lowest strength losses of the carbon-free materials. In general, the carbon-containing materials had very low strengths because the carbon content was only 4 wt%. The matrix strength was therefore quite low. However, the additions of nanoadditives increased the strength of the carbon-containing alumina. Meanwhile, in the carbon-containing mullite, the nanoadditives caused an enhanced reaction of the used mullite raw material, while in the carbon-containing AZT, the nanoadditives resulted in enhanced decomposition of the aluminum titanate phase — leading to reduced strengths after thermal shock. Nevertheless, all alumina-based compositions as well as the carbon-free mullite-matrix materials seem very promising for application in steel ingot casting.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | Thermal shock resistance; nanoadditives; mullite; alumina-titania-zirconia; fused raw material |
| Institutionen der Universität: | Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Keramische Werkstoffe Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Keramische Werkstoffe > Lehrstuhl Keramische Werkstoffe - Univ.-Prof. Dr.-Ing. Stefan Schafföner |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 25 Mai 2023 09:23 |
| Letzte Änderung: | 25 Mai 2023 09:23 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/76257 |