Abstract: An extrusion head for additive manufacturing includes an enclosure defining a supply chamber. The enclosure includes at least one inlet port opening into the supply chamber and configured to receive a material to be extruded under pressure and a plurality of extrusion nozzles. Each nozzle is in communication with the supply chamber and opens onto the exterior of the enclosure via an outlet orifice. The nozzles of the plurality of nozzles are arranged adjacent to one another with a determined spacing between each nozzle outlet orifice.

Abstract: An extrusion head for additive manufacturing includes an enclosure defining a supply chamber. The enclosure includes at least one inlet port opening into the supply chamber and configured to receive a material to be extruded under pressure and a plurality of extrusion nozzles. Each nozzle is in communication with the supply chamber and opens onto the exterior of the enclosure via an outlet orifice. The nozzles of the plurality of nozzles are arranged adjacent to one another with a determined spacing between each nozzle outlet orifice.

Abstract: Embodiments of the present invention relates to an acoustic metamaterial, as well as to a method for manufacturing the same. The acoustic metamaterial includes a plurality of channels or columns each having the same cross-section with a hydraulic radius between 5 and 300 ?m, which channels or columns are arranged with a periodic spacing between 2 and 600 ?m. This results in a highly dense network that can provide optimal acoustic absorption and/or impedance over a wide frequency range. The method for manufacturing the same includes additive manufacturing with a plurality of consecutive material deposition steps to form, in each step, a layer comprising a plurality of periodically repeated cells separated by walls. The layers deposited in the consecutive material deposition steps are stacked with their respective cells aligned to form channels.

Abstract: An acoustic panel has two substantially parallel skins between which cavities forming Helmholtz resonators are arranged. One of the skins is bored with orifices, each of which opens into one of said cavities and forms a neck of the resonators. One or more of said cavities includes of a hollow structure having the shape of a triangular-based prism.

Abstract: A method of a coating by additive manufacturing on a turbomachine casing includes depositing on an internal surface of the turbomachine casing a filament of an abradable material to create a three-dimensional scaffold of filaments. A filamentary material deposition system is positioned from the internal surface of the casing; a first layer of the coating is deposited over 360?; a rotation of the filamentary material deposition system is carried out by a first predetermined angle and the filamentary material deposition system is positioned from the deposited layer; a second layer of coating is deposited on the first coating layer, on a sector of the casing; a displacement is carried out corresponding to the first sector already covered, then for the following sectors until 360° is covered; and after having carried out a rotation of the filamentary material deposition system.

Abstract: There is provided a piezoelectric composite comprising a piezoelectric polymer and particles of a filler dispersed in the polymer, wherein the filler is in micro or nanoparticle form and is present in a filler:polymer weight ratio between about 1:99 and about 95:5. There is also provided an ink and ink cartridge for 3D printing of the piezoelectric composite. There is also provided a piezoelectric 3D printed material comprising the piezoelectric composite and a bifunctional material comprising the piezoelectric composite with one or more conductive electrodes adjacent to the piezoelectric composite. Methods of manufacture and uses thereof are also provided, including methods for 3D printing of a piezoelectric 3D printed material via solvent-cast or FDM 3D printing starting from the piezoelectric composite and/or the ink.

Abstract: An extrusion head for additive manufacturing includes an enclosure defining a supply chamber. The enclosure includes at least one inlet port opening into the supply chamber and configured to receive a material to be extruded under pressure and a plurality of extrusion nozzles. Each nozzle is in communication with the supply chamber and opens onto the exterior of the enclosure via an outlet orifice. The nozzles of the plurality of nozzles are arranged adjacent to one another with a determined spacing between each nozzle outlet orifice.

Abstract: A metallic ink for solvent-cast 3D printing, the ink comprising a solution or a gel of a polymer in a volatile solvent, and heat-sinterable metallic particles dispersed in the solution or gel, wherein the particles are present in a particles:polymer weight ratio of more than about 85:15, is provided. There is also provided a method of manufacturing this ink and a method of manufacturing a solvent-cast metallic 3D printed material using this ink.

Abstract: A method of a coating by additive manufacturing on a turbomachine casing, including depositing on an internal surface of the turbomachine casing a filament of an abradable material to create a three-dimensional scaffold of filaments forming an ordered array of channels.

Abstract: An ink for solvent-cast 3D printing is provided. The ink comprises a solution or gel of a polymer in a volatile solvent, and carbon nanotubes dispersed in the solution or gel. In the ink, the carbon nanotubes are present in a carbon nanotubes:polymer weight ratio between about 20:80 and about 40:60, and the polymer and carbon nanotubes total concentration is between about 20 and about 35 wt %, based on the total weight of the ink. There is also provided a 3D printer ink cartridge comprising the ink; a method of manufacturing the ink; a method of manufacturing a solvent-cast 3D printed material using the ink, a solvent-cast 3D printed material as well as uses thereof.

Abstract: There is provided a piezoelectric composite comprising a piezoelectric polymer and particles of a filler dispersed in the polymer, wherein the filler is in micro or nanoparticle form and is present in a filler:polymer weight ratio between about 1:99 and about 95:5. There is also provided an ink and ink cartridge for 3D printing of the piezoelectric composite. There is also provided a piezoelectric 3D printed material comprising the piezoelectric composite and a bifunctional material comprising the piezoelectric composite with one or more conductive electrodes adjacent to the piezoelectric composite. Methods of manufacture and uses thereof are also provided, including methods for 3D printing of a piezoelectric 3D printed material via solvent-cast or FDM 3D printing starting from the piezoelectric composite and/or the ink.

Abstract: A metallic ink for solvent-cast 3D printing, the ink comprising a solution or a gel of a polymer in a volatile solvent, and heat-sinterable metallic particles dispersed in the solution or gel, wherein the particles are present in a particles:polymer weight ratio of more than about 85:15, is provided. There is also provided a method of manufacturing this ink and a method of manufacturing a solvent-cast metallic 3D printed material using this ink.

Abstract: An ink for solvent-cast 3D printing is provided. The ink comprises a solution or gel of a polymer in a volatile solvent, and carbon nanotubes dispersed in the solution or gel. In the ink, the carbon nanotubes are present in a carbon nanotubes:polymer weight ratio between about 20:80 and about 40:60, and the polymer and carbon nanotubes total concentration is between about 20 and about 35 wt %, based on the total weight of the ink. There is also provided a 3D printer ink cartridge comprising the ink; a method of manufacturing the ink; a method of manufacturing a solvent-cast 3D printed material using the ink, a solvent-cast 3D printed material as well as uses thereof.

Abstract: A tidal motor system comprises a horizontal floating platform subjected to a vertical movement due to the tides. The platform is preferably in a circular shape in order to minimize friction, and in combination with a hub located in the center and extending upwardly and comprising angle pitch. A dome located above high tide comprises a meshing device with opposite angle pitch to receive the hub. When the hub is rising (or descending) because of a rising (or a descending) tide, the extension of the hub working as a drive shaft engages a first gear provided with a meshing female, and the first gear commands a number of meshing intermediate gears wherein the last gear drives a generator or suitable mechanical device. The gears are enclosed in a dome fastened in combination with vertical beams anchored in the ground to ensure the stability of the system.

Abstract: An electromagnetic motor (20) comprises a number of head cubicules (24,24?,24?,24??) comprising electromagnets which produce a magnetic charge at the top (45), and a sleeve (49) receiving pistons (26,26?,26?,26??) at the bottom (47), the pistons actionning a crankshaft (21). At the upper face of each piston a permanent magnet is installed such that its polarity is the same as that of the electromagnetic charge of its corresponding head cubicle. The repulsion created produces a torque moment around the crankshaft which turns the crankshaft thereby the motor.

Abstract: Devices that include hosts having internal microcapillary networks are disclosed. The microcapillary networks are formed from interconnected passageways. The interconnected passageways may be formed by removing a fugitive material from a cured host material that forms the host. The resultant host material has many applications, including use as a microfluidic device in applications ranging from fluid mixing to structural repair.

Abstract: Devices that include hosts having internal microcapillary networks are disclosed. The microcapillary networks are formed from interconnected passageways. The interconnected passageways may be formed by removing a fugitive material from a cured host material that forms the host. The resultant host material has many applications, including use as a microfluidic device in applications ranging from fluid mixing to structural repair.

Abstract: There are provided methods for the real-time radiation-assisted fabrication of freeform three-dimensional structures. For example, one of these methods comprise depositing on a substrate, by means of nozzle, a filament comprising a curable polymer, while exposing the filament to a radiation so as to cure the curable polymer, and while moving the substrate and the nozzle, with respect to one another, according to the x-axis, y-axis, and z-axis or at least two of these axes. Such a method permits to obtain a freeform three-dimensional structure having at least one point of contact with the substrate.

Abstract: Devices that include hosts having internal microcapillary networks are disclosed. The microcapillary networks are formed from interconnected passageways. The interconnected passageways may be formed by removing a fugitive material from a cured host material that forms the host. The resultant host material has many applications, including use as a microfluidic device in applications ranging from fluid mixing to structural repair.

Abstract: Devices that include hosts having internal microcapillary networks are disclosed. The microcapillary networks are formed from interconnected passageways. The interconnected passageways may be formed by removing a fugitive material from a cured host material that forms the host. The resultant host material has many applications, including use as a microfluidic device in applications ranging from fluid mixing to structural repair.