Curing characteristics of ceramic stereolithography for an aqueous-based silica suspension

Chen, Zhangwei; Li, D; Zhou, Weizhao; Wang, L

doi:10.1243/09544054jem1751

Cited by 41 publications

(19 citation statements)

References 17 publications

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“…Nowadays, CSL is used in medicine for dental and bone healing applications, in microtechnology for the production of microelectromechanical systems (MEMS), sensors, piezoelements and photonic crystals, and also in large scaled applications such as turbine blades or mechanically durable structures. 295] Figures 8 and 9 show ceramic structures generated by CSL and used for several different applications.…”

Section: Stereolithography (Sla)mentioning

confidence: 99%

Additive Manufacturing of Ceramic‐Based Materials

et al. 2014

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This paper offers a review of present achievements in the field of processing of ceramic-based materials with complex geometry using the main additive manufacturing (AM) technologies. In AM, the geometrical design of a desired ceramic-based component is combined with the materials design. In this way, the fabrication times and the product costs of ceramic-based parts with required properties can be substantially reduced. However, dimensional accuracy and surface finish still remain crucial features in today's AM due to the layer-by-layer formation of the parts. In spite of the fact that significant progress has been made in the development of feedstock materials, the most difficult limitations for AM technologies are the restrictions set by material selection for each AM method and aspects considering the inner architectural design of the manufactured parts. Hence, any future progress in the field of AM should be based on the improvement of the existing technologies or, alternatively, the development of new approaches with an emphasis on parts allowing the near-net formation of ceramic structures, while optimizing the design of new materials and of the part architecture.

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Section: Stereolithography (Sla)mentioning

confidence: 99%

Additive Manufacturing of Ceramic‐Based Materials

et al. 2014

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“…The density of the laser energy is inversely proportional to the scanning speed, as can be found in equation (1). In the light of the previous findings obtained by Chen et al 19 concerning the relationship between the cured depth of a single layer L d and the laser energy density E 0 , the result was that higher E 0 (namely lower v) led to thicker L d . It was also found that the inadequate scanning speed region was v .…”

Section: Resultsmentioning

confidence: 72%

“…This may be caused by the scattering of the laser light in the ceramic suspension, which has been discussed in the authors' previous article. 19 Significance evaluation and range analysis of each parameter in the SL process. The linear shrinkage results of SL experiments designed in Table 3 were analyzed using the direct analysis Taguchi's Range Analysis method to find the optimum SL parameters combination.…”

Section: Resultsmentioning

confidence: 99%

“…Their respective values have been derived from previous tests. 19 As for the sintering process, the three key factors are heating rate, sintering temperature and holding time, which would be crucial to the mechanical and physical behaviors (density, bending strength, porosity) as well as the dimensional accuracy (shrinkage) for the final ceramic parts. There are also three levels applied for each factor (Table 2) within the ranges, which are commonly used in the ceramic industry.…”

Section: Experimental Design With the Taguchi Methodsmentioning

confidence: 99%

“…In a previous study, 19 an aqueous-based silica suspension loaded with 50 vol% silica powders was produced. The measured viscosity of the suspension was less than 1000 MPa at a shear rate of 100 s 21 at room temperature.…”

Section: Ceramic Suspension Propertiesmentioning

confidence: 99%

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Process parameters appraisal of fabricating ceramic parts based on stereolithography using the Taguchi method

Chen

Zhou

2012

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this work, the influences of stereolithography parameters (laser scanning speed, sliced layer thickness, laser spot compensation, etc.) and sintering schemes, consisting of sintering temperature, heating rate and holding time on the performance of green and final ceramic parts, have been investigated experimentally with the Taguchi method. In the stereolithography process, laser spot compensation was found to be the principal factor influencing the shrinkage of green samples. Optimum stereolithography parameters were obtained: hatch spacing 0.15 mm; laser scanning speed 1400 mm/s; sliced layer thickness 0.15 mm; and laser spot compensation 0.35 mm. A freeze-drying method was applied to minimize the drying shrinkage and avoid damages during the dehydration process of green samples. The optimum sintering scheme was also determined: heating rate 150°C/h, sintering temperature 1200°C and holding time 2 h. A bending strength of at least 10 MPa and open porosity of 35% were reached, making the ceramics adequate to produce investment casting molds.

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