Process combining the isostatic pressing to uniaxial pressing. A metallic punch applies an uniaxial pressure on the simplest surface of the part thanks to a fluid, an isostatic pressure on the other face more complex of the part.

Compaction of a powder in a rigid matrix thanks to a punch. The pressing mold is metallic and the parties in contact with powder can be treated to resist to abrasion, corrosion …

The rapid prototyping is a ceramic shaping process which use stereolithography. This process allows manufacturing the same model drawn on computer from CAD file. The manufacturing a this part is done in some hours. A UV laser polymerizes, layer-by-layer, a photosensitive paste, mixture of photopolymerisable resin and a ceramic powder. After elimination of monomer surplus, we obtain the green part, which is then debinded and sintered in order to have the definitive part.

Wikipedia : Rapid prototyping is the automatic construction of physical objects using additive manufacturing technology. The first techniques for rapid prototyping became available in the late 1980s and were used to produce models and prototype parts. Today, they are used for a much wider range of applications and are even used to manufacture production-quality parts in relatively small numbers. Some sculptors use the technology to produce complex shapes for fine arts exhibitions.

More on wikipedia

Material offering a good cohesion and a good mechanical behaviour at high temperature. The refractoriness depends on mineral product composition and can be evaluated by specific tests, like refractoriness temperature or refractoriness-under-load.

It characterized the maximal stress of a material can support before breaking. It is function of atomic or molecular bond intensity, microstructure, but also of exterior parameters like form part or defaults present in the structure.

Device where can occur a phenomenon of echo. Material environment able to vibrate under the influence of an excitant.

Dimensional variation of a part, in reduction volume way. The shrinkage is generally done during the drying and the firing of the part. The linear shrinkage (in %) can be isotropic or anisotropic, in measuring the reduction of the length reported to the green length.

Sorry, this entry is only available in Español, Deutsch and Français.

Technique said of rapid prototyping, which allows making solid objects from a digital model. The object is obtained by superposition of very thin layers, thus avoiding manufacturing.

Technology description (Wikipedia) :

“Stereolithography is an additive manufacturing process using a vat of liquid UV-curable photopolymer “resin” and a UV laser to build parts a layer at a time. On each layer, the laser beam traces a part cross-section pattern on the surface of the liquid resin. Exposure to the UV laser light cures, solidifies the pattern traced on the resin and adheres it to the layer below.

After a pattern has been traced, the SLA’s elevator platform descends by a single layer thickness, typically 0.05 mm to 0.15 mm (0.002″ to 0.006″). Then, a resin-filled blade sweeps across the part cross section, re-coating it with fresh material. On this new liquid surface, the subsequent layer pattern is traced, adhering to the previous layer. A complete 3-D part is formed by this process. After building, parts are cleaned of excess resin by immersion in a chemical bath and then cured in a UV oven.

Stereolithography requires the use of support structures to attach the part to the elevator platform and to prevent certain geometry from not only deflecting due to gravity, but to also accurately hold the 2-D cross sections in place such that they resist lateral pressure from the re-coater blade. Supports are generated automatically during the preparation of 3-D CAD models for use on the stereolithography machine, although they may be manipulated manually. Supports must be removed from the finished product manually; this is not true for all rapid prototyping technologies.”

More on Wikipedia

Particles separation following their size, by selective run through the calibrated holes fixed at a frame and forming sieves. If d is the measurement of the size, the grain with inferior sizes to d form the passing while grain with superior size form the oversize.

Family of fabrication techniques of mechanical items. The principle of the manufacturing is to remove some matter, so as to give to the raw piece the wanted shape, using a machine tool.

Liquid phase development in significant quantity during the ceramic material sintering. This liquid apparition is done in a thermal interval called vitrification range.

Material obtained by partial or total devitrification of a glass. The glass-ceramic is particularly used for their resistance to thermal shock and their thermal expansion coefficient practical null.

Zirconium oxide ZrO2, very good cold mechanical properties, coloured for applications in jewellery, excellent mechanical properties in the high temperatures, the weak thermal conductivity at room temperature, conductor in T> 1000°C, big hardness, good wear resistance, good chemical slowness, good resistance in the attacks of metals.

Wikipedia: Zirconium dioxide (ZrO₂), sometimes known as zirconia (not to be confused with zircon), is a white crystalline oxide of zirconium. Its most naturally occurring form, with a monoclinic crystalline structure, is the rare mineral baddeleyite. The high temperature cubic crystalline form is rarely found in nature as mineral tazheranite (Zr,Ti,Ca)O₂ (and a doubtful mineral arkelite). This form, also called cubic zirconia, is synthesized in various colours for use as a gemstone and a diamond simulant.

More on Wikipedia