Provided are a powder for laser manufacturing which can be stably manufactured and from which a three-dimensional manufactured object ensuring a manufacturing accuracy can be obtained and a using method thereof. A powder for ceramic manufacturing for obtaining a manufactured object by repeatedly sintering or fusing and solidifying in sequence a powder in an irradiation portion with laser light, in which the powder includes a plurality of compositions, at least one composition of the compositions is an absorber that relatively strongly absorbs the laser light compared to other compositions, and at least a part of the absorber changes to a different composition that relatively weakly absorbs the laser light by irradiation with the laser light and a using method of a powder in which the powder is used.

A system for producing an object from a powder by selective laser sintering. The system includes a chamber and a support platform in the chamber. A spreader applies a layer of powder to a bed surface. An irradiation source irradiates select points in the powdered layer prepared on the support platform. A radiant heater heats at least a portion of the bed surface. A temperature sensor monitors the temperature of select points on the bed surface. A controller adjusts the radiant heater in response to temperature data provided by the temperature sensor.

A manufacturing method for a three-dimensional structure includes forming unit layers using at least one of a first flowable composition including first powder and a second flowable composition including second powder and solidifying at least one of the first flowable composition including the first powder and the second flowable composition including the second powder in the unit layers. In the forming the unit layers, both of the first flowable composition and the second flowable composition are caused to be present in plane directions crossing a thickness direction of the unit layers.

A method of providing a particulate material from an at least substantially metallic and/or ceramic starting material, comprising the following steps:

(a) generating the particulate material from the starting material by vaporizing the starting material by introducing energy, preferably radiation energy, in particular by means of at least one laser, into the starting material and subsequently at least partially condensing the vaporized starting material,

b) collecting the particulate material in at least one receiving and/or transporting device, in particular at least one container,

c) receiving, in particular storing, and/or transporting the particulate material in the receiving and/or transporting device and/or in a further receiving and/or transporting device such that it can be used for a subsequent process, in particular in a state of at least non-permanent passivation, and

d) providing the particulate material for the subsequent process.

The disclosed method includes selecting a suspension ceramic or metal photocurable composition (CPC or MPC); preparing a sacrificial organic material (SOM) forming a photocurable layer destroyed by heating; for manufacturing pieces, on the working tray, forming successive layers of SOM cured by irradiation, the one or more CPC or MPC-based pieces being manufactured by machining a recess in a layer of cured SOM; depositing the CPC or MPC within the recesses; curing the CPC or MPC to obtain a hard horizontal surface level with the adjacent layer of cured SOM, when forming each recess, it is delimited by previously defined patterns, the depth(s) selected in order to ensure the continuity of the one or more pieces to be manufactured; and obtaining one or more green pieces inserted in the SOM, which are subjected to debinding by heating in order to destroy the SOM in which they are trapped.

A method for providing control data for a generative layer construction device has a first step of accessing a data record which, at least for a partial region of an object cross section, specifies in which temporal sequence an energy beam bundle is to be moved in scanning lines over the places of this partial region to scan the buildup material. In a second step, the data record is changed such that in at least one of the layers for the respective partial region of an object cross-section, a check is carried out to determine whether the scan time required to scan the buildup material along a scanning line falls below a predefined minimum duration tmin and either a lower energy density of the energy beam bundle during scanning of the buildup material along this scanning line is specified and/or a wait time is specified before the energy beam bundle is moved along a further scanning line.

A method for layer-wise additive manufacturing of a shaped body made up of slices of processed layers, including the steps: creating a layer of a slurry, the slurry including binder, a dispersing medium and a particulate filler material, solidifying the slurry layer, directing electromagnetic radiation to the solidified layer for processing it by debinding and/or sintering, and repeating the above-mentioned steps to successively build the shaped body.

A laser induced forward transfer (LIFT) process utilizing a laser to direct laser beam pulses acts on a coating of slurry on a carrier to transfer droplets of slurry to a receptor surface to create the slurry layer which is then processed further by above-mentioned steps of solidifying, and debinding and/or sintering.

A flow device for an additive manufacturing device (1) for the production of a three-dimensional object (2) by layer-wise selective solidification of a building material in a build area (10) comprises: a process chamber (3), a gas supply device for generating a gas stream in the additive manufacturing device (1), at least one gas inlet (32, 43, 132, 232) for introducing the gas stream into the process chamber (3) and at least one gas outlet (34, 45) for directing the gas stream out of the process chamber (3), and a gas supply line (30), which is provided outside the process chamber (3), in order to conduct gas to the at least one gas inlet (32, 43, 132, 232), the gas supply line (30) comprising at least a first line section (31, 41) which adjoins the gas inlet (32, 43, 132, 232) and which extends a length (L) along a first extension direction of the gas supply line (30), the first extension direction being substantially straight, and wherein the first line section (31, 41) extends a maximum value of a width (B) that extends transverse to the first extension direction and parallel to the build area (10), and wherein the length (L) of the first line section (31, 41) is at least as large as one half of the maximum value of the width (B) and wherein the first line section (31, 41) further comprises a first subsection (51) that is arranged at a distance from the gas inlet (32, 43, 132, 232) and which comprises at least a first flow conditioning unit (50, 150) in addition to a wall of the first line section (31, 41), the first flow conditioning unit being designed to substantially align the gas stream in the first extension direction.

The invention relates to a method for the production of a composition, in particular a SiC precursor granulate, for use in additive manufacturing from a solution or dispersion.

A method of making a multi-composition fiber is provided, which includes providing a precursor laden environment, and forming a fiber in the precursor laden environment using laser heating. The precursor laden environment includes a primary precursor material and an elemental precursor material. The formed fiber includes a primary fiber material and an elemental additive material, where the elemental additive material has too large an atom size to fit within a single crystalline domain within a crystalline structure of the fiber, and is deposited on grain boundaries between adjacent crystalline domains of the primary fiber material to present an energy barrier to atomic diffusion through the grain boundaries, and to increase creep resistance by slowing down growth between the adjacent crystalline domains of the primary fiber material.