Microstructure, Thermal and Mechanical Properties of Refractory Linings Modified with Polymer Fibers
The reduction in the inherent brittleness of coatings applied on parts of ceramic shielding used for continuous steel casting (CSC) processes is highly desired, since it can significantly diminish losses occurring during post-application handling and mounting. One of such coatings, prepared mostly f...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Ceramics |
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| Online Access: | https://www.mdpi.com/2571-6131/5/2/15 |
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| author | Marcin Prochwicz Paweł Czaja Jerzy Morgiel Tomasz Czeppe Anna Góral |
| author_facet | Marcin Prochwicz Paweł Czaja Jerzy Morgiel Tomasz Czeppe Anna Góral |
| author_sort | Marcin Prochwicz |
| collection | DOAJ |
| description | The reduction in the inherent brittleness of coatings applied on parts of ceramic shielding used for continuous steel casting (CSC) processes is highly desired, since it can significantly diminish losses occurring during post-application handling and mounting. One of such coatings, prepared mostly from fused silica, ludox, tabular alumina, chamotte, cenospheres, dextrine and aluminum powder, is known commercially as Thermacoat™. The present experiment is focused on the effect of the modification of its composition by rising the content of the cenospheres (max. 2.5 wt.%) or by introducing up to 1.5 wt.% of polymer Belmix™ fibers (~34 μm diameter/12 mm length) on the microstructure and mechanical properties. The maximum amount of introduced additions was limited by the accompanying loss of mass viscosity, which must allow for deposition through immersion. Next, the differential scanning calorimetry and differential thermogravimetric analysis techniques were employed to evaluate the extent of the weight change and heat response of the mass during the drying and annealing stages. The dried materials’ microstructure was investigated with light and scanning electron microscopy, while the chemical composition was studied by energy dispersive spectroscopy. Finally, a three-point flexural bending method was used to determine changes in the material mechanical properties. The performed experiments proved that the small addition (~1 wt.%) of polymer fibers is sufficient for the significant improvement of the Thermacoat™ green mechanical strength at ambient temperature, presenting a reproducible ultimate flexural strength of ~0.2 MPa. |
| first_indexed | 2024-03-10T00:09:08Z |
| format | Article |
| id | doaj.art-66667bf24375405d89c03f27123a9321 |
| institution | Directory Open Access Journal |
| issn | 2571-6131 |
| language | English |
| last_indexed | 2024-03-10T00:09:08Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Ceramics |
| spelling | doaj.art-66667bf24375405d89c03f27123a93212023-11-23T16:02:33ZengMDPI AGCeramics2571-61312022-04-015217318110.3390/ceramics5020015Microstructure, Thermal and Mechanical Properties of Refractory Linings Modified with Polymer FibersMarcin Prochwicz0Paweł Czaja1Jerzy Morgiel2Tomasz Czeppe3Anna Góral4Vesuvius Poland, 12 Tyniecka St., 32-050 Skawina, PolandThe Aleksander Krupkowski Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta St., 30-059 Kraków, PolandThe Aleksander Krupkowski Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta St., 30-059 Kraków, PolandThe Aleksander Krupkowski Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta St., 30-059 Kraków, PolandThe Aleksander Krupkowski Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta St., 30-059 Kraków, PolandThe reduction in the inherent brittleness of coatings applied on parts of ceramic shielding used for continuous steel casting (CSC) processes is highly desired, since it can significantly diminish losses occurring during post-application handling and mounting. One of such coatings, prepared mostly from fused silica, ludox, tabular alumina, chamotte, cenospheres, dextrine and aluminum powder, is known commercially as Thermacoat™. The present experiment is focused on the effect of the modification of its composition by rising the content of the cenospheres (max. 2.5 wt.%) or by introducing up to 1.5 wt.% of polymer Belmix™ fibers (~34 μm diameter/12 mm length) on the microstructure and mechanical properties. The maximum amount of introduced additions was limited by the accompanying loss of mass viscosity, which must allow for deposition through immersion. Next, the differential scanning calorimetry and differential thermogravimetric analysis techniques were employed to evaluate the extent of the weight change and heat response of the mass during the drying and annealing stages. The dried materials’ microstructure was investigated with light and scanning electron microscopy, while the chemical composition was studied by energy dispersive spectroscopy. Finally, a three-point flexural bending method was used to determine changes in the material mechanical properties. The performed experiments proved that the small addition (~1 wt.%) of polymer fibers is sufficient for the significant improvement of the Thermacoat™ green mechanical strength at ambient temperature, presenting a reproducible ultimate flexural strength of ~0.2 MPa.https://www.mdpi.com/2571-6131/5/2/15refractory coatingsfiber-reinforced compositessteel castingmicrostructure |
| spellingShingle | Marcin Prochwicz Paweł Czaja Jerzy Morgiel Tomasz Czeppe Anna Góral Microstructure, Thermal and Mechanical Properties of Refractory Linings Modified with Polymer Fibers Ceramics refractory coatings fiber-reinforced composites steel casting microstructure |
| title | Microstructure, Thermal and Mechanical Properties of Refractory Linings Modified with Polymer Fibers |
| title_full | Microstructure, Thermal and Mechanical Properties of Refractory Linings Modified with Polymer Fibers |
| title_fullStr | Microstructure, Thermal and Mechanical Properties of Refractory Linings Modified with Polymer Fibers |
| title_full_unstemmed | Microstructure, Thermal and Mechanical Properties of Refractory Linings Modified with Polymer Fibers |
| title_short | Microstructure, Thermal and Mechanical Properties of Refractory Linings Modified with Polymer Fibers |
| title_sort | microstructure thermal and mechanical properties of refractory linings modified with polymer fibers |
| topic | refractory coatings fiber-reinforced composites steel casting microstructure |
| url | https://www.mdpi.com/2571-6131/5/2/15 |
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