Abstract:
This method for producing a three-dimensional object (1) from a powder or from a mixture of powders by sintering and/or laser melting comprises manufacturing steps consisting of depositing, compacting, then solidifying, in predetermined areas, successive layers of the powder or of the mixture of powders. It further comprises the following steps: a) before implementing the steps of manufacturing the three-dimensional object and from a manufacturing table (3), manufacturing, by sintering and/or laser melting, a support (5) whereof the surface or surfaces oriented towards the three-dimensional object to be manufactured are respectively homothetic to surfaces (11) opposite the three-dimensional object to be manufactured; b) manufacturing, by sintering and/or laser melting, blades (7) for supporting the three-dimensional object to be manufactured on the support produced in step a); c) manufacturing the three-dimensional object from the upper surfaces of the blades manufactured in step b) and d) when the manufacturing of the three-dimensional object is complete, detaching the three-dimensional object from the support by applying a force to the three-dimensional object or to the support, moving the object and the support relative to one another until the blades break.
Abstract:
One embodiment of the invention includes first particles comprising an intermetallic compound comprising titanium and aluminum; second particles comprising aluminum; and third particles comprising titanium.
Abstract:
Structure and a method for producing very dense bodies of material from particulate materials. A particulate material is placed within an electrically conductive container. A solenoid or coil encompasses the electrically conductive container, and a large magnitude of electrical current is caused to flow through the solenoid or coil. As the electrical current flows through the solenoid or coil, large magnitudes of magnetic pressures are created upon the electrically conductive container, and the electrically conductive container is compressed, and the transverse dimension thereof is reduced. Thus, the particulate material within the electrically conductive container is very firmly compacted, and a rigid body of material is provided. Any one of numerous types of particulate material may be employed. For example, a body of electrical superconductive material of any desired size and shape can be produced by this method by the use of superconducting particulate material. A method and system for selecting various parameters which enable the material to be "over-pressure" and densified to densities in excess of 90 % of the material's maximum density is also illustrated in another embodiment of the invention. The various parameters include establishing a stand-off distance, a container wall density and thickness, a fill density and a compressibility value for the material. Once the various parameters are established and for a selected material, the material is magnetically compacted to over-pressure the material to a pressure level which exceeds the pressure applied by a wall of the container. This, in turn, enables the system and method to densify the material to densities in excess of 90 % of its maximum density.
Abstract:
Ein Verfahren und eine Vorrichtung zum Herstellen von 3D-Formteilen mittels Schichtaufbautechnik, wobei der Pulverkuchen (104) stabilisiert wird.
Abstract:
Novel processes are provided for the production of porous ceramic preforms, metal activated porous ceramic preforms and intermetallic/ceramic/metal composites. These products are all manufactured using processes which are based on tape casting techniques.
Abstract:
Disclosed is a method and apparatus for automatically fabricating a three-dimensional object from individual layers of fabrication material having a predetermined configuration. Successive layers are stacked in a predetermined sequence and affixed together to form the object. The fabrication material is carried on a substrate to a stacker station. At this station the indivicual layers are stacked together, with successive layers being affixed to each other, with the substrate removed after affixation.
Abstract:
The present disclosure provides three-dimensional (3D) printing processes and systems, including methods, apparatuses, software, and systems for transferring a particulate material from one position (e.g., on one surface) to another position (e.g., on a different surface), which particulate material may be used for the production of a 3D object. In some embodiments, the particulate material may be transferred using, for example, a charged particle optical device.
Abstract:
A powder feed mechanism (10) for a three-dimensional printer in which a heap of powder is drawn up from a powder container to be spread across a material bed (12) rather than dropped or deposited on it. The mechanism comprises a carrier arm (26) that moves through a powder chamber (15), and a support platform (28) for carrying a heap of powdered build material. The support platform moves with the carrier arm. The carrier arm moves to a powder delivery position in which the support platform is in a transverse orientation for lying flush with the material bed. This arrangement can reduce the path travelled by the powder from the powder chamber to the material bed and give greater control over the shape of the heap of powder that is to be spread over the material bed.