Abstract: There are provided reactive metal powder in-flight heat treatment processes. For example, such processes comprise providing a reactive metal powder; and contacting the reactive metal powder with at least one additive gas while carrying out said in-flight heat treatment process, thereby obtaining a raw reactive metal powder.

Abstract: Provided are graphene nanosheets having a polyaromatic hydrocarbon concentration of less than about 0.7% by weight and a tap density of less than about 0.08 g/cm3, as measured by ASTM B527-15 standard. The graphene nanosheets also have a specific surface area (B.E.T) greater than about 250 m2/g. Also provided are processes for producing graphene nanosheets as well as for removing polyaromatic hydrocarbons from graphene nanosheets, comprising heating said graphene nanosheets under oxidative atmosphere, at a temperature of at least about 200° C.

Abstract: There are provided reactive metal powder in-flight heat treatment processes. For example, such processes comprise providing a reactive metal powder; and contacting the reactive metal powder with at least one additive gas while carrying out said in-flight heat treatment process, thereby obtaining a raw reactive metal powder.

Abstract: Provided are graphene nanosheets having a polyaromatic hydrocarbon concentration of less than about 0.7% by weight. Also provided are Graphene nanosheets having a polyaromatic hydrocarbon concentration of about 0.01% to about 0.5%.

Abstract: Provided are graphene nanosheets having a polyaromatic hydrocarbon concentration of less than about 0.7% by weight. Also provided are Graphene nanosheets having a polyaromatic hydrocarbon concentration of about 0.01% to about 0.5%.

Abstract: A powder treatment assembly and method for treating a feedstock powder of feedstock particles includes directing the feedstock powder into a plasma chamber within a reactor, exposing the feedstock powder to a plasma field generated by a plasma source to form a treated powder having treated particles with an increased average sphericity relative to the feedstock particles, and supplying a hot gas sheath flow downstream of the plasma chamber, the hot gas sheath flow substantially surrounding the treated powder.

Abstract: Provided are graphene nanosheets having a polyaromatic hydrocarbon concentration of less than about 0.7% by weight and a tap density of less than about 0.08 g/cm3, as measured by ASTM B527-15 standard. The graphene nanosheets also have a specific surface area (B.E.T) greater than about 250 m2/g. Also provided are processes for producing graphene nanosheets as well as for removing polyaromatic hydrocarbons from graphene nanosheets, comprising heating said graphene nanosheets under oxidative atmosphere, at a temperature of at least about 200° C.

Abstract: Provided are graphene nanosheets having a polyaromatic hydrocarbon concentration of less than about 0.7% by weight and a tap density of less than about 0.08 g/cm3, as measured by ASTM B527-15 standard. The graphene nanosheets also have a specific surface area (B.E.T) greater than about 250 m2/g. Also provided are processes for producing graphene nanosheets as well as for removing polyaromatic hydrocarbons from graphene nanosheets, comprising heating said graphene nanosheets under oxidative atmosphere, at a temperature of at least about 200° C.

Abstract: An electron beam melting machine and a method of operation are provided which maintains constant energy absorption within a build layer by adjusting an incident energy level to compensate for energy not absorbed by the additive powder. This unabsorbed energy is detected in the form of electron emissions, which include secondary electrons, backscattered electrons, and/or electrons which are transmitted through the build platform.

Abstract: Provided are graphene nanosheets having a polyaromatic hydrocarbon concentration of less than about 0.7% by weight and a tap density of less than about 0.08 g/cm3, as measured by ASTM B527-15 standard. The graphene nanosheets also have a specific surface area (B.E.T.) greater than about 250 m2/g. Also provided are processes for producing graphene nanosheets as well as for removing polyaromatic hydrocarbons from graphene nanosheets, comprising heating said graphene nanosheets under oxidative atmosphere, at a temperature of at least about 200° C.

Abstract: There are provided reactive metal powder in-flight heat treatment processes. For example, such processes comprise providing a reactive metal powder; and contacting the reactive metal powder with at least one additive gas while carrying out said in-flight heat treatment process, thereby obtaining a raw reactive metal powder.

Abstract: A plasma atomization metal powder manufacturing process includes providing a heated metal source and contacting the heated metal source with the plasma of at least one plasma source under conditions effective for causing atomization of the heated metal source. The atomization may be carried out using a gas to metal ratio of less than about 20, thereby obtaining a raw metal powder having a 0-106 ?m particle size distribution yield of at least 80%. The process may further include aligning the heated metal source with the plasma of at least one plasma source. An atomizing system may include an alignment system positioned upstream of the plasma source and adapted to adjust an orientation of the metal source relative to the at least one plasma source.

Abstract: There are provided reactive metal powder in-flight heat treatment processes. For example, such processes comprise providing a reactive metal powder; and contacting the reactive metal powder with at least one additive gas while carrying out said in-flight heat treatment process, thereby obtaining a raw reactive metal powder.

Abstract: A plasma atomization metal powder manufacturing process includes providing a heated metal source and contacting the heated metal source with the plasma of at least one plasma source under conditions effective for causing atomization of the heated metal source. The atomization may be carried out using a gas to metal ratio of less than about 20, thereby obtaining a raw metal powder having a 0-106 ?m particle size distribution yield of at least 80%. The process may further include aligning the heated metal source with the plasma of at least one plasma source. An atomizing system may include an alignment system positioned upstream of the plasma source and adapted to adjust an orientation of the metal source relative to the at least one plasma source.

Abstract: A powder treatment assembly and method for treating a feedstock powder of feedstock particles includes directing the feedstock powder into a plasma chamber within a reactor, exposing the feedstock powder to a plasma field generated by a plasma source to form a treated powder having treated particles with an increased average sphericity relative to the feedstock particles, and supplying a hot gas sheath flow downstream of the plasma chamber, the hot gas sheath flow substantially surrounding the treated powder.

Abstract: A system and method for treating additive powder includes a reactor configured for receiving a large volume of additive powder. An evacuation subsystem removes injected or residual gases from the reactor chamber by purging the chamber with an inert gas or drawing a vacuum within the chamber. A heating assembly raises the reactor content temperature of the reactor chamber while the additive powder is continuously stirred. A gas mixture including a small amount of reactive gas is injected into the reactor chamber to modify the surface chemistry of the additive powder before the additive powder is slowly cooled down.

Abstract: Aluminum-based metallic powders, along with their methods of production and formation, are provided. The Al-based metallic powders are formed with an increased amount of oxygen within at least a portion of the particles of the powder. The Al-based metallic powders show improved flowability.

Abstract: Provided are plasma processes for producing graphene nanosheets comprising injecting into a thermal zone of a plasma a carbon-containing substance at a velocity of at least 60 m/s standard temperature and pressure STP to nucleate the graphene nanosheets, and quenching the graphene nanosheets with a quench gas of no more than 1000° C. The injecting of the carbon-containing substance may be carried out using a plurality of jets. The graphene nanosheets may have a Raman G/D ratio greater than or equal to 3 and a 2D/G ratio greater than or equal to 0.8, as measured using an incident laser wavelength of 514 nm. The graphene nanosheets may be produced at a rate of at least 80 g/h. The graphene nanosheets can have a polyaromatic hydrocarbon concentration of less than about 0.7% by weight.

Abstract: An electron beam melting machine and a method of operation are provided which maintains constant energy absorption within a build layer by adjusting an incident energy level to compensate for energy not absorbed by the additive powder. This unabsorbed energy is detected in the form of electron emissions, which include secondary electrons, backscattered electrons, and/or electrons which are transmitted through the build platform.

Abstract: Provided are plasma processes for producing graphene nanosheets comprising injecting into a thermal zone of a plasma a carbon-containing substance at a velocity of at least 60 m/s standard temperature and pressure STP to nucleate the graphene nanosheets, and quenching the graphene nanosheets with a quench gas of no more than 1000° C. The injecting of the carbon-containing substance may be carried out using a plurality of jets. The graphene nanosheets may have a Raman G/D ratio greater than or equal to 3 and a 2D/G ratio greater than or equal to 0.8, as measured using an incident laser wavelength of 514 nm. The graphene nanosheets may be produced at a rate of at least 80 g/h. The graphene nanosheets can have a polyaromatic hydrocarbon concentration of less than about 0.7% by weight.