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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Neto, R.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2021Development of 3D printing sustainable mortars based on a bibliometric analysiscitations
- 2021Effect of 3D printer enabled surface morphology and composition on coral growth in artificial reefscitations
- 2019Machinability of titanium aluminides: A reviewcitations
- 2019The effect of machining on surface integrity of gamma titanium aluminides using different cemented carbide tools
- 2017Effect of the chemical milling process on the surface of titanium aluminide castings
- 2017Experimental characterization of ceramic shells for investment casting of reactive alloyscitations
- 2015DEVELOPMENT OF A PROJECT AND MANUFACTURE METHODOLOGY FOR TITANIUM ALLOYS JOINT PROSTHESES
- 2004Conversion of rapid prototyping models into metallic tools by ceramic moulding - An indirect rapid tooling processcitations
- 2003CONVERSION OF RAPID PROTOTYPING MODELS INTO METALLIC TOOLS BY CERAMIC MOULDING - AN INDIRECT RAPID TOOLING PROCESS
- 2003Conversion of rapid prototyping models into metallic tools by ceramic moulding - An indirect rapid tooling process
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article
Experimental characterization of ceramic shells for investment casting of reactive alloys
Abstract
The investment casting of reactive Ti and TiAl alloys requires the use of selected ceramics in the face-coat layer to prevent the reaction between the cast metal and ceramic shell, avoiding the formation of a hard layer at the metallic components surface. This work aims to study the influence of ceramic shells composition in some of its characteristics such as flexural strength, friability and dimensional accuracy. The microstructure of the shells was evaluated by SEM. Changes in the face-coat and back-up ceramic shells composition determines the ceramic shell strength to withstand the casting stage with adequate mould permeability and thermal conductivity, and a compromise resistance for knock-out. All the non-conventional ceramic shell systems with interest for reactive alloys, based on fumed alumina binder and alumina sand for the back-ups, present higher dimensional stability (low shrinkage or expansion) compared with traditional systems based on colloidal silica binder and zircon and aluminosilicates backups. In this work, better mechanical strength and lower friability were obtained with non-conventional face-coats of alumina and polymer binders, both with yttria flour and stucco, followed by alumina back-ups. Selecting the right ceramic shell composition, it is possible to achieve adequate properties for casting titanium alloys.