Disclosed in the present invention are a heavy rare earth alloy, neodymium-iron-boron permanent magnet material, a raw material, and a preparation method. The heavy rare earth alloy comprises the following components: RH: 30-100 mas %, not including 100 mas %; X, 0-20 mas %, not including 0; B: 0-1.1 mas %; and Fe and/or Co: 15-69 mas %, RH comprising one or more heavy rare earth elements in Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Sc, and X being Ti and/or Zr. When the heavy rare earth alloy of the present invention is used as a sub-alloy to prepare the neodymium-iron-boron permanent magnet material, a high utilization rate of heavy rare earth is achieved, so that the coercivity can also be greatly improved while the neodymium-iron-boron permanent magnet material maintains high remanence.

A 3D printed diamond/metal matrix composite material and a preparation method and application thereof are provided. The composite material includes core-shell doped diamond, a metal matrix, and an additive, where the core-shell doped diamond includes a core, a transition layer, a shell, a coating, a porous layer, and a modification layer. The preparation method includes: uniformly mixing the diamond, the metal matrix, and the additive and performing 3D printing according to a 3D CAD slice model to obtain the composite material designed by the model. The metal matrix and the diamond surface of the composite material are mainly metallurgically bound, which can improve the binding strength between the diamond and the metal matrix, thereby improving the use properties of the composite material and a diamond tool. The core-shell doped diamond has good ablation resistance, and can effectively avoid and reduce thermal damage to diamond in a 3D printing forming process.

Apparatus for additively manufacturing three-dimensional objects by means of successive layerwise selective irradiation and consolidation of layers of a build material which can be consolidated using at least one energy beam, wherein an irradiation device is adapted to generate and guide the energy beam to at least one position of a build plane, wherein a determination unit is adapted to determine at least one parameter of radiation propagating in a process chamber of the apparatus, wherein a calibration element is arrangeable or arranged in the process chamber, wherein the calibration element comprises at least one calibration section that is adapted to emit measurement radiation upon irradiation with the or an energy beam and in that the determination unit is adapted to detect the measurement radiation, wherein a control unit is adapted to calibrate the irradiation device.

Disclosed herein are embodiments of mechanically alloyed powder feedstock and methods for spheroidizing them using microwave plasma processing. The spheroidized powder can be used in metal injection molding processes, hot isostatic processing, and additive manufacturing. In some embodiments, mechanical milling, such as ball milling, can be used to prepare high entropy alloys for microwave plasma processing.

Disclosed herein are embodiments of mechanically alloyed powder feedstock and methods for spheroidizing them using microwave plasma processing. The spheroidized powder can be used in metal injection molding processes, hot isostatic processing, and additive manufacturing. In some embodiments, mechanical milling, such as ball milling, can be used to prepare high entropy alloys for microwave plasma processing.

A method of surface modification of a metal or metal alloy powder includes the steps of providing a metal or metal alloy powder including copper, gold, or silver and having an average diameter in the micron range; providing a powder having an alloying element to form an alloying element powder. The alloying element powder particles have an average diameter less than 10 micron and no more than half the average diameter of the metal or metal alloy powder particles; mixing the powders to form a mixed powder; heating the mixed powder in an atmosphere of reducing gas to a first temperature T1; after temperature T1 is reached, replacing the reducing gas atmosphere with an inert gas atmosphere and maintaining the temperature at a second temperature T2 for a predetermined time. The alloying element is capable of diffusing in the metal or metal alloy element at temperature T2.

An R-T-B-based permanent magnet which contains R that represents at least one rare earth element essentially including Tb or Dy, T that represents Fe or at least one iron-group element essentially including Fe and Co, and B that represents boron, and further contains Cu. The total content of R is 28.35 to 29.95% by mass, inclusive, the content of Cu is 0.05 to 0.40% by mass, inclusive, and the content of B is 0.93 to 1.00% by mass, inclusive. The distribution of the concentration of Tb or Dy decreases from the outside of the R-T-B-based permanent magnet toward the inside of the R-T-B-based permanent magnet.

The present invention relates to a metal powder for use within an additive manufacturing process, the powder comprising steel particles, wherein the steel particles comprise, in a proportion by weight greater than or equal to 0.01% by weight and less than or equal to 5% by weight, carbonitrides (C,N) and/or carbides (C) and/or nitrides (N) selected from the group consisting of titanium, zirconium or mixtures thereof. Furthermore, the present invention relates to a method for producing a steel powder suitable for use within an additive manufacturing process and to the use of the steel powder according to the invention in an additive manufacturing process.

The present invention relates to a metal powder for use within an additive manufacturing process, the powder comprising steel particles, wherein the steel particles comprise, in a proportion by weight greater than or equal to 0.01% by weight and less than or equal to 5% by weight, carbonitrides (C,N) and/or carbides (C) and/or nitrides (N) selected from the group consisting of titanium, zirconium or mixtures thereof. Furthermore, the present invention relates to a method for producing a steel powder suitable for use within an additive manufacturing process and to the use of the steel powder according to the invention in an additive manufacturing process.

The invention relates to the field of metallurgy, namely to new heat-resistant aluminum alloys used in additive technologies. The alloy includes nickel, manganese, iron, zirconium, cerium, at least one element selected from the group: copper, magnesium, zinc, and at least one element selected from the group: silicon, calcium, where Ni>Mn+Fe, one or more eutectic phases of the type of Al.sub.3Ni, Al.sub.16Mn.sub.3Ni, Al.sub.9FeNi, which are thermally stable, and dispersoids of the Al.sub.3Zr type, which ensure an ultimate strength of a resulting product of at least 370 MPa. The technical effect is the development of an aluminum material used in the form of a powder, which has good processability when printing and increased strength characteristics at room temperature after printing, without a significant decrease in strength after annealing.