Unraveling the hardening mechanism during laser-induced slip casting of lithium aluminate-microsilica slurry
Additive manufacturing (AM) of alkali-activated materials is a promising method for producing ceramic precursors, construction elements and other parts. A recently introduced AM process is laser-induced slip casting of lithium aluminate/microsilica slurries, which yields parts with excellent mechani...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-03-01
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| Series: | Open Ceramics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539521000067 |
| _version_ | 1818716097336049664 |
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| author | Sebastian Simon Gregor J.G. Gluth |
| author_facet | Sebastian Simon Gregor J.G. Gluth |
| author_sort | Sebastian Simon |
| collection | DOAJ |
| description | Additive manufacturing (AM) of alkali-activated materials is a promising method for producing ceramic precursors, construction elements and other parts. A recently introduced AM process is laser-induced slip casting of lithium aluminate/microsilica slurries, which yields parts with excellent mechanical strengths. To clarify the underlying mechanisms, μ-Raman spectroscopy was applied to parts produced by the process, and the dissolution and hydration of lithium aluminate was studied inter alia using conventional and in-situ X-ray diffraction. The results show that significant dissolution of lithium aluminate occurs, particularly at increased temperatures during laser interaction, which leads to an increase of pH and precipitation of an akopovaite-like Li-Al-CO3 layered double hydroxide. The increase of the pH is likely to induce dissolution of the microsilica and possibly formation of a hydrous lithium aluminosilicate gel. These observations explain the strength evolution of the studied parts and can also aid the development and improvement of related AM methods. |
| first_indexed | 2024-12-17T19:13:50Z |
| format | Article |
| id | doaj.art-f6cbfff7a15e4edc85a93feac39f8b28 |
| institution | Directory Open Access Journal |
| issn | 2666-5395 |
| language | English |
| last_indexed | 2024-12-17T19:13:50Z |
| publishDate | 2021-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Open Ceramics |
| spelling | doaj.art-f6cbfff7a15e4edc85a93feac39f8b282022-12-21T21:35:48ZengElsevierOpen Ceramics2666-53952021-03-015100060Unraveling the hardening mechanism during laser-induced slip casting of lithium aluminate-microsilica slurrySebastian Simon0Gregor J.G. Gluth1Corresponding author.; Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205, Berlin, GermanyBundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205, Berlin, GermanyAdditive manufacturing (AM) of alkali-activated materials is a promising method for producing ceramic precursors, construction elements and other parts. A recently introduced AM process is laser-induced slip casting of lithium aluminate/microsilica slurries, which yields parts with excellent mechanical strengths. To clarify the underlying mechanisms, μ-Raman spectroscopy was applied to parts produced by the process, and the dissolution and hydration of lithium aluminate was studied inter alia using conventional and in-situ X-ray diffraction. The results show that significant dissolution of lithium aluminate occurs, particularly at increased temperatures during laser interaction, which leads to an increase of pH and precipitation of an akopovaite-like Li-Al-CO3 layered double hydroxide. The increase of the pH is likely to induce dissolution of the microsilica and possibly formation of a hydrous lithium aluminosilicate gel. These observations explain the strength evolution of the studied parts and can also aid the development and improvement of related AM methods.http://www.sciencedirect.com/science/article/pii/S2666539521000067Alkali-activated materialsAdditive manufacturingLaser-induced slip castingLithiumLayered double hydroxide |
| spellingShingle | Sebastian Simon Gregor J.G. Gluth Unraveling the hardening mechanism during laser-induced slip casting of lithium aluminate-microsilica slurry Open Ceramics Alkali-activated materials Additive manufacturing Laser-induced slip casting Lithium Layered double hydroxide |
| title | Unraveling the hardening mechanism during laser-induced slip casting of lithium aluminate-microsilica slurry |
| title_full | Unraveling the hardening mechanism during laser-induced slip casting of lithium aluminate-microsilica slurry |
| title_fullStr | Unraveling the hardening mechanism during laser-induced slip casting of lithium aluminate-microsilica slurry |
| title_full_unstemmed | Unraveling the hardening mechanism during laser-induced slip casting of lithium aluminate-microsilica slurry |
| title_short | Unraveling the hardening mechanism during laser-induced slip casting of lithium aluminate-microsilica slurry |
| title_sort | unraveling the hardening mechanism during laser induced slip casting of lithium aluminate microsilica slurry |
| topic | Alkali-activated materials Additive manufacturing Laser-induced slip casting Lithium Layered double hydroxide |
| url | http://www.sciencedirect.com/science/article/pii/S2666539521000067 |
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