Study of the viability of manufacturing ceramic moulds by additive manufacturing for rapid casting

Garzón, Edwin Ocaña; Alves, Jorge Lino; Neto, Rui

doi:10.1016/j.ctmat.2016.09.004

Cited by 8 publications

(8 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Materials 2020, 13, x FOR PEER REVIEW 4 of 17 do not test using temperature time ramps for considering the phase changes in the raw powder, its effect on the binder and volatiles and the influence in the mechanical properties. In Ocaña et al [19], the temperature time ramps were conditioned by the infiltrate used; therefore, the scope of this research is very different from ours since in our case, we do not apply any infiltrate before the thermal treatment. In the next sections, the experimental procedure and the results are explained in detail.…”

Section: Manufacturing Test Specimens and Raw Materialsmentioning

confidence: 88%

“…Some authors have focused on infiltration post-processing. Ocaña et al [19] studied the feasibility of making plaster moulds using binder jetting technology to apply in casting processes. The moulds were post-treated using different infiltrates and post-processing parameters.…”

Section: Specimens Preparationmentioning

confidence: 99%

“…They applied treatments at high heat (250 • C for 30 min), low heat (150 • C for 30 min) and Epsom salt treatment. Ocaña et al [19] applied thermal treatments to calcium-sulphate hemihydrate moulds using temperature time ramps. Three cycles were studied as a function of the infiltrate used (ethyl silicate, Levasil, Ludox SK, Aerodisp, Ticoat-N and zirconium acetate).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Towards Functional Parts by Binder Jetting Calcium-Sulphate with Thermal Treatment Post-Processing

et al. 2020

View full text Add to dashboard Cite

The objective of our research is to improve the properties of calcium-sulphate hemihydrate parts printed by binder jetting. In this paper, we show the thermal treatment results when using temperature time ramps on binder-jetted ceramic parts without infiltrating. The results show that the mechanical properties of printed parts are improved substantially. Two different thermal cycles were investigated for their effect on the dehydration process of CaSO4·½H2O using infrared analysis. The thermal-treated samples were compared with respect to porosity, surface roughness, compression strength and dimensional and weight variation. The proposed thermal treatment significantly improves the compression strength in a short time, guaranteeing dimensional stability while providing a good surface. This improvement in mechanical properties offers a great chance for using binder-jetted parts as functional components, for example, in the casting field or the medical sector (scaffolds).

show abstract

Section: Manufacturing Test Specimens and Raw Materialsmentioning

confidence: 88%

Section: Specimens Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Towards Functional Parts by Binder Jetting Calcium-Sulphate with Thermal Treatment Post-Processing

et al. 2020

View full text Add to dashboard Cite

show abstract

“…They observed that by decreasing the thickness of the layer and increasing the amount of binder added between particles bond, an improvement in tensile strength was achieved, although worse results were produced in the surface quality of the mold. Edwin et al [16] studied the feasibility of printing plaster molds to produce aluminum metal castings. To improve the mechanical and thermal properties of the mold, they performed post-processing operations such as infiltration.…”

Section: Of 16mentioning

confidence: 99%

Comparative Study on Microstructure and Corrosion Resistance of Al-Si Alloy Cast from Sand Mold and Binder Jetting Mold

Sastre

Cabezón

Abia

et al. 2021

Metals

View full text Add to dashboard Cite

This investigation is focused on the corrosion evaluation of an as-cast Al-Si alloy, obtained by two different casting methods: traditional sand casting and three-printing casting, using a binder jetted mold. The experimental results are discussed in terms of chemical composition, microstructure, hardness, and corrosion behavior of two different casting parts. The microstructure and composition of the sample before and after the corrosion tests was analyzed using light microscopy (OM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (DRX). The corrosion of the two processed castings was analyzed using anodic polarization (PA) test and electrochemical impedance spectroscopy (EIS) in an aerated solution of 3.5% by weight NaCl, similar to the seawater environment. After the corrosion process, the samples were analyzed by inductively coupled plasma/optical emission spectrometry (ICP/OES); the composition was used to determine the chloride solution after immersion times. The sample processed by binder jetting mold showed higher corrosion resistance with nobler potentials, lower corrosion densities, higher polarization resistance, and more stable passive layers than the sample processed by sand casting. This improvement of corrosion resistance could be related to the presence of coarse silicon particles, which decrease of cathodic/anodic ratio and the number of micro-galvanic couples, and the lower amount of intermetallic β Al-Fe-Si phase observed in cast alloy solidified in binder jetting mold.

show abstract

“…A solution would be the creation of molds using plaster powder that would be able to withstand high temperatures and, at the same time, would be water-soluble. In literature preliminary researches are available where direct metallic cast in plaster mold were successfully tested in case of simple geometries (Garzón et al , 2017) or as a function of different heat treatment post process (Rodríguez-González et al , 2020). Based on the aforementioned possible solution, to enlarge the knowledge about this topic the authors tested the performance of gypsum powder to realize complex molds or cores for aluminum casting.…”

Section: Introductionmentioning

confidence: 99%

Casting of complex structures in aluminum using gypsum molds produced via binder jetting

Giorleo

Bonaventi

2021

RPJ

View full text Add to dashboard Cite

Purpose The purpose of present paper is to enlarge the knowledge about the performance of gypsum powder to realize complex molds or cores for aluminum casting. Design/methodology/approach The research was divided into two activities: simple; and complex-part production capability. In the simple-part step, the performance of gypsum powder and the minimum mold thickness that would withstand the casting process. In the complex-part step, the authors first investigated the powder removability as a function of geometry complexity and then binder jetting performance was evaluated for the case of lattice-structure fabrication. Findings All the geometries tested withstand the casting process demonstrating the benefits in terms of complexity part design; however, the process suffers of all the typical defect of casting as misrun, porosity and cold shut. Originality/value The results found in this research improve the benefits related to additive manufacturing application in industrial environment and in particular to the binder jetting technology and the rapid casting approach.

show abstract

Study of the viability of manufacturing ceramic moulds by additive manufacturing for rapid casting

Cited by 8 publications

References 8 publications

Towards Functional Parts by Binder Jetting Calcium-Sulphate with Thermal Treatment Post-Processing

Towards Functional Parts by Binder Jetting Calcium-Sulphate with Thermal Treatment Post-Processing

Comparative Study on Microstructure and Corrosion Resistance of Al-Si Alloy Cast from Sand Mold and Binder Jetting Mold

Casting of complex structures in aluminum using gypsum molds produced via binder jetting

Contact Info

Product

Resources

About