A particulate for an additive manufacturing technique includes a particulate body formed from a particulate material and a coating disposed over particulate body. The coating includes a carbonaceous material that has a reflectivity that is lower than a reflectivity of the particulate material to reduce an energy input requirement of the particulate such that less energy is necessary to fuse the particulate into a layer of an article fabricated using the additive manufacturing technique. A method of making particulate is also disclosed.

A powder coating device includes a reaction device, a driving device, a gas supply device, and a gas delivery device. The gas delivery device includes a rotating shaft and a sleeve. The rotating shaft is connected to an inner cylinder and the driving device, and a first gas path communicated with a reaction chamber is defined along an axis of the rotating shaft, and a plurality of gas holes for communicating the first gas path with outside of the rotating shaft are defined in the rotating shaft. The sleeve is sleeved on the rotating shaft, and a second gas path for the rotating shaft to pass through is defined in the sleeve, the second gas path is communicated with the gas supply device, and the plurality of the gas holes is located inside the second gas path.

A method for preparing an oxygen-free passivated titanium or titanium-alloy powder product by means of gas-solid fluidization is provided. The new method includes placing the metal halide and the titanium powder which meet formula requirements into a gasifier and a fluidized bed reactor respectively; heating the gasifier to gasify the metal halide, and introducing dry argon and halide gas into the fluidized bed reactor; opening the fluidized bed, heating the fluidized bed, fluidizing the titanium powder after the introduction of the argon and the metal halide gas, and cooling the product to obtain the titanium powder subjected to oxygen-free passivation using metal chloride; molding the oxygen-free passivated titanium powder into a green body with powder metallurgy technology; and sintering the green body in vacuum or argon atmosphere according to the molding technology, and after temperature rise treatment, performing a densification sintering operation to obtain a high-performance titanium product component.

A method for preparing an oxygen-free passivated titanium or titanium-alloy powder product by means of gas-solid fluidization is provided. The new method includes placing the metal halide and the titanium powder which meet formula requirements into a gasifier and a fluidized bed reactor respectively; heating the gasifier to gasify the metal halide, and introducing dry argon and halide gas into the fluidized bed reactor; opening the fluidized bed, heating the fluidized bed, fluidizing the titanium powder after the introduction of the argon and the metal halide gas, and cooling the product to obtain the titanium powder subjected to oxygen-free passivation using metal chloride; molding the oxygen-free passivated titanium powder into a green body with powder metallurgy technology; and sintering the green body in vacuum or argon atmosphere according to the molding technology, and after temperature rise treatment, performing a densification sintering operation to obtain a high-performance titanium product component.

Wave-absorbing material powder of the present invention has oxidation resistance and salt fog resistance, which includes an iron-containing wave-absorbing material powder, and a metal oxide ceramic layer and a metal phosphate layer sequentially coated on an outside of the iron-containing wave-absorbing material powder from the inside to the outside. A method for preparing the wave-absorbing material powder includes using atomic layer deposition to coat the iron-containing wave absorbing material powder with a metal oxide ceramic coating, and then adopting the atomic layer deposition to coat the metal oxide ceramic coating with a metal phosphate layer; repeating the above steps to form an alternating nano-stack of the metal oxide ceramic coating and the metal phosphate layer outside the iron-containing absorbing material powder; and finally performing a high-temperature annealing treatment. The present invention improves temperature resistance, corrosion resistance and oxidation resistance of wave-absorbing materials.

The present disclosure provides a powder-atomic-layer-deposition device with knocker, which mainly includes a vacuum chamber, a shaft seal, a drive unit and a knocker. The drive unit is connected to the rear wall of the vacuum chamber via the shaft seal, for driving the vacuum chamber to rotate. The shaft seal includes an outer tube and an inner tube, wherein the inner tube is disposed within the containing space of the outer tube. The inner tube is disposed with a gas-extracting pipeline and a gas-inlet pipeline therein, wherein the gas-extracting pipeline is for gas extraction of the vacuum chamber, the gas-inlet pipeline is for transferring a precursor gas into the vacuum chamber. The knocker and the vacuum chamber are adjacent to each other, for knocking the vacuum chamber to prevent powders within the reacting space from sticking to the inner surface of the vacuum chamber.

A system, apparatus and method are provided for processing articles. The system includes subsystems for synthesizing, pre-treating, conducting a vapor phase coating process and post-treating articles in the form of powders and solid or porous workpieces. The apparatus permits vapor phase synthesis, treatment and deposition processes to be performed with high efficiency and at high overall throughput. The methods include converting solids, liquids or gases into gaseous and solid streams that can be separated or exchanged with or without treatment and/or coating steps, and produce optimized composite articles for specific applications.

A system, apparatus and method are provided for processing articles. The system includes subsystems for synthesizing, pre-treating, conducting a vapor phase coating process and post-treating articles in the form of powders and solid or porous workpieces. The apparatus permits vapor phase synthesis, treatment and deposition processes to be performed with high efficiency and at high overall throughput. The methods include converting solids, liquids or gases into gaseous and solid streams that can be separated or exchanged with or without treatment and/or coating steps, and produce optimized composite articles for specific applications.

A deposition system includes an isolator or fume hood and a reactor for coating particles, the reactor including a rotatable reactor assembly positioned within the isolator or fume hood and including a reactor drum configured to hold a plurality of particles to be coated, an inlet tube, and an outlet tube. The reactor drum is configured to be detached from the inlet tube and the outlet tube by an operator while the reactor drum remains within the isolator or fume hood.

Mechanically fluidized systems and processes allow for efficient, cost-effective production of silicon coated particles having very low levels of contaminants such as metals and oxygen. These silicon coated particles are produced, conveyed, and formed into crystals in an environment maintained at a low oxygen level or a very low oxygen level and a low contaminant level or very low contaminant level to minimize the formation of silicon oxides and minimize the deposition of contaminants on the coated particles. Such high purity coated silicon particles may not require classification and may be used in whole or in part in the crystal production method. The crystal production method and the resultant high quality of the silicon boules produced are improved by the reduction or elimination of the silicon oxide layer and contaminants on the coated particles.