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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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| Petrov, R. H. | Madrid |
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| Bih, L. |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Azam, Siraj |
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| Ali, M. A. |
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| Rančić, M. |
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| Azevedo, Nuno Monteiro |
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Koralnik, Mateusz
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Topics
Publications (9/9 displayed)
- 2017Thermo-visual camera used for the evaluation of the drying time in the production of casting dies
- 2017Assesment of Infrared Drying Time of Ceramic Shell Molds with use of Thermal Imaging Camera
- 2017Evaluation of Cooling Time of SiC Ceramic Mold Using Thermal Imaging Camera
- 2017Microstructure characterization of ceramic shell molds
- 2016Characterization and evaluation properties of ceramic proppants used in the extraction of the unconventional hydrocarbons
- 2016The Influence of the Melt-Pouring Temperature and Inoculant Content on the Macro and Microstructure of the IN713C Ni-Based Superalloycitations
- 2016Experimental ceramic proppants characterization in the process of shale gas extraction
- 2015Study of deflocculation of white clay for obtaining ceramic proppants fabrication in spray dryer
- 2015Influence of deflocculant addition on rheological properties of the slurries based on bauxite
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document
Assesment of Infrared Drying Time of Ceramic Shell Molds with use of Thermal Imaging Camera
Abstract
The investment casting technique, known as the Bridgman process, is commonly applied to production of complex geometrical parts of aerial engines made of nickel-based superalloys. Generating an appropriate ceramic shell mold is a crucial stage in the casting process. The basic materials suitable for the casting shells are powders and binders. A binder generally consists of nanocomposite with a polymer matrix containing nanoparticles of SiO2. The materials selected for particular shell molds layers have to reveal specific properties such as non-reactivity of the first layer surrounded by a molten metal, chemical purity and thermal resistance. In case of structural layers, it is required to apply materials with high a mechanical strength, gas permeability, creep resistance, high thermal conductivity and knock-out properties.The following research involves outcomes from the studies of received moulding materials.The microstructure analysis proceeded with Scanning Electron Microscopy. Particle size distribution was evaluated on the basis of laser diffraction technique. XRF and XRD analysis enabled identification ofthe powders’ chemical content and their phases. Moreover, a number of rheological properties of ceramic slurries(applied on industrial scale) such as dynamic viscosity, density, pH and adhesion toa brazen plate, were examined to verify their applicability for shell molds production.The critical stage determining time of the casting is a drying process. Nowadays, the ceramic shell molds, depending on selected materials, number of layers and drying conditions (temperature and moisture), are exposed to drying within 3-7 days. Implementation of infrared searchlight enabled reduction of drying time and thus the whole process which was monitored with use of the thermal imaging camera. The obtained results proved effectiveness of the infrared searchlight and usefulness of the camera as a device to control drying process of multilayer ceramic shell molds.