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Additive manufacturing of SiO2–Al2O3 refractory products via Direct Ink Writing.
- Source :
-
Ceramics International . Dec2020, Vol. 46 Issue 17, p27254-27261. 8p. - Publication Year :
- 2020
-
Abstract
- The Direct Ink Writing (DIW) method is an approach for fabricating refractory products with complex shapes in an efficient and cost-effective manner. This study investigated the influence of printing parameters on the performance of Al 2 O 3 refractory products prepared via DIW. It was found that the layer height is an effective parameter for tuning the inter-space size and the adhesion between layers, under constant extrusion rate and distance between the deposited filaments. The inter-space size could be eliminated by decreasing the layer height to 1.0 mm (i.e., 50% of the nozzle diameter); the flexural strength was enhanced from 45 MPa to 61 MPa when the layer height decreased from 1.8 mm (i.e., 90% of the nozzle diameter) to 0.8 mm (i.e., 40% of the nozzle diameter). Changing the layer height led to a deviation in printing, this deviation could be eliminated by optimizing the travel speed of the nozzle. At a layer height of 0.8 mm, the size deviation could be reduced from 10.5% to 0.59% when the nozzle travel speed changed from 35 mm/s to 70 mm/s. Consequently, there was a considerable improvement in the printing efficiency. These results indicate that, owing to their dense microstructures, samples prepared at a layer height of 0.8 mm exhibit superior slag resistance and a high flexural strength of 61 MPa after sintering at 1600 °C for 3 h. [ABSTRACT FROM AUTHOR]
- Subjects :
- *FLEXURAL strength
*SLAG
*INK
*NOZZLES
*MANUFACTURING processes
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 46
- Issue :
- 17
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 146481534
- Full Text :
- https://doi.org/10.1016/j.ceramint.2020.07.210