GRK2802: Effect of microporous Al2O3-MgAl2O4 content on the thermal shock resistance and molten steel purification performance of β-SiC whisker-reinforced Al2O3-MgAl2O4-C ceramic filters
References to related material | https://doi.org/10.1016/j.jmrt.2025.11.087 | |
Type of the data | Image | |
Type of the data | Text | |
Total size of the dataset | 49389772 | |
Author | Song, Jinwen | |
Author | Yan, Wen | |
Author | Volkova, Olena | |
Author | Andrä, Stefan | |
Author | Bellé, Matheus Roberto | |
Author | Neubert, Lukas | |
Author | Tian, Can | |
Author | Li, Yuanbing | |
Upload date | 2026-04-27T14:58:16Z | |
Publication date | 2026-04-27T14:58:16Z | |
Publication date | 2026-04-27 | |
Abstract of the dataset | This study investigates the effect of microporous Al2O3-MgAl2O4 content on the phase composition, microstructures, mechanical properties, and purification performance for molten steel of Al2O3-MgAl2O4-C filters, conducted through XRD, SEM, EDS, immersion test with molten steel, and so on. The results indicate that the microporous Al2O3-MgAl2O4 raw material significantly promotes the formation of in-situ β-SiC whiskers within the filters, which intertwine among the particles and grow within the microporous structure, working synergistically with the MgAl2O4 phase to improve the strength and thermal shock resistance. Regarding molten steel purification, on the one hand, the microporous structure of Al2O3-MgAl2O4 particles enhances the filter’s contact area with molten steel, imparting a higher physisorption efficiency to the filter. On the other hand, MgAl2O4 has a greater tendency for carbothermal reactions, generating Mg vapor that has a strong chemisorption capability for [Al], [O], and Al2O3 inclusions in the molten steel. The microporous structure and MgAl2O4 facilitate the formation of a MgAl2O4 reaction layer at the interface during immersion test, contributing to the purification of the molten steel. The filter AM60, prepared with 60 wt% microporous Al2O3-MgAl2O4 powder, not only exhibits excellent thermal shock resistance (with a cold compressive strength of 0.54 MPa and a strength of 0.59 MPa after three thermal shock tests), but also demonstrates a high purification efficiency (reducing inclusions in steel by 68%, and lowering the total oxygen content from 56.3 ppm to 13.5 ppm). Finally, the formation mechanism of in-situ β-SiC whiskers, the role of microporous Al2O3-MgAl2O4 raw material in purification function, and the comprehensive molten steel purification mechanism were proposed. | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/2240 | |
Publisher | Technische Universität Bergakademie Freiberg | |
Specification of the discipline(s) | 4::43 | |
Title of the dataset | GRK2802: Effect of microporous Al2O3-MgAl2O4 content on the thermal shock resistance and molten steel purification performance of β-SiC whisker-reinforced Al2O3-MgAl2O4-C ceramic filters | |
Project abstract | The focus of this project is to investigate the interaction of a Al-killed low-sulphur manganese-boron steel and a highly basic desulphurisation slag with MgO-C products based on recyclates and environmentally friendly binders. In order to determine the influence of thermophysical properties on the interaction with new refractory materials, the viscosity, surface tension and density of the liquid aluminium-killed steel in undesulphurised and desulphurised condition and the slags with high sulphur capacity are investigated as a function of [S], [B], (SiO2), (MgO), (S) and temperature. By finger testing a MgO-C product in the molten steel and slag, the refractory samples are obtained for further analysis of the interactions using optical microscopy and SEM/EDX. The (S)/[S] distribution between the MBW1500 steel and the slag is investigated in a crucible of MgO-C products based on recyclates in the MFG-40. The inclusion population of the steel samples after examination via Finger Testing is interpreted by chemical analysis and analysed by optical examination methods such as light microscopy combined with AFA (Automatic Feature Analysis) in P-SEM. The spinel formation between recycled MgO-C material and liquid steel is specifically studied in SEM/EDX microscopy. | |
Funding Acknowledgement | The dataset was generated within the framework of the Research Training Group GRK 2802 (project ID: 461482547) funded by the German Research Foundation (DFG). | |
Public project website(s) | https://tu-freiberg.de/en/research/grk2802 | |
Project title | GRK2802_Associated Member_Jinwen Song_P5_Research into the effect of MgO-C products based on recyclates and environmentally friendly binders on the sulphidic purity of the steels and the spinel formation |