A production method of particulate materials, through centrifugal atomization (CA) is disclosed. The method is suitable for obtaining fine spherical powders with exceptional morphological quality and extremely low content, or even absence of non-spherical-shape particles and internal voids. A appropriate cost effective method for industrial scale production of metal, alloy, intermetallic, metal matrix composite or metal like material powders in large batches is also disclosed. The atomization technique can be extended to other than the centrifugal atomization with rotating element techniques.

A production method of particulate materials, through centrifugal atomization (CA) is disclosed. The method is suitable for obtaining fine spherical powders with exceptional morphological quality and extremely low content, or even absence of non-spherical-shape particles and internal voids. A appropriate cost effective method for industrial scale production of metal, alloy, intermetallic, metal matrix composite or metal like material powders in large batches is also disclosed. The atomization technique can be extended to other than the centrifugal atomization with rotating element techniques.

The current invention discloses a type of micronized powder for manufacturing sintered Neodymium magnetic material, a target type jet mill pulverization method to prepare the micronized powder, and the resulting pulverized powder. The Neodymium magnet powder created under the method is of sphericity of greater than or equal to 90% and of particle adhesion rate of less than or equal to 10%. A is the diameter of the target center, B is the diameter of the side nozzle, and C is the distance between the target center and the nozzle. The relationship amongst A, B and C is A/B=m×(C/A+B), where m ranges from 1 to 7. A velocity of the jet stream from side nozzle is between about 320 m/s to about 580 m/s.

The current invention discloses a type of micronized powder for manufacturing sintered Neodymium magnetic material, a target type jet mill pulverization method to prepare the micronized powder, and the resulting pulverized powder. The Neodymium magnet powder created under the method is of sphericity of greater than or equal to 90% and of particle adhesion rate of less than or equal to 10%. A is the diameter of the target center, B is the diameter of the side nozzle, and C is the distance between the target center and the nozzle. The relationship amongst A, B and C is A/B=m×(C/A+B), where m ranges from 1 to 7. A velocity of the jet stream from side nozzle is between about 320 m/s to about 580 m/s.

A metal powder for additive manufacturing having a composition including the following elements, expressed in content by weight: 0.01%≤C≤0.2%, 2.5%≤Ti≤10%, (0.45×Ti)−1.35%≤B≤(0.45×Ti)+0.70%, S≤0.03%, P≤0.04%, N≤0.05%, O≤0.05% and optionally containing: Si≤1.5%, Mn≤3%, Al≤1.5%, Ni≤1%, Mo≤1%, Cr≤3%, Cu≤1%, Nb≤0.1%, V≤0.5% and including eutectic precipitates of TiB.sub.2 and optionally of Fe.sub.2B, the balance being Fe and unavoidable impurities resulting from the elaboration, the metal powder having a mean roundness of at least 0.70. The invention also relates to its manufacturing method by argon atomization.

A metal powder for additive manufacturing having a composition including the following elements, expressed in content by weight: 0.01%≤C≤0.2%, 2.5%≤Ti≤10%, (0.45×Ti)−1.35%≤B≤(0.45×Ti)+0.70%, S≤0.03%, P≤0.04%, N≤0.05%, O≤0.05% and optionally containing: Si≤1.5%, Mn≤3%, Al≤1.5%, Ni≤1%, Mo≤1%, Cr≤3%, Cu≤1%, Nb≤0.1%, V≤0.5% and including eutectic precipitates of TiB.sub.2 and optionally of Fe.sub.2B, the balance being Fe and unavoidable impurities resulting from the elaboration, the metal powder having a mean roundness of at least 0.70. The invention also relates to its manufacturing method by argon atomization.

One object of the present invention is to provide a bonding material capable of forming a highly reliable bond, the present invention provides a bonding material having a plate shape or a sheet shape, wherein the bonding material includes: fine copper particles having an average particle diameter of 300 nm or less; coarse copper particles having an average particle diameter of 3 .Math.m or more and 11 .Math.m or less; and a reducing agent which reduces the fine copper particles and the coarse copper particles.

An alloy powder having an alloy composition represented by Fe.sub.100-a-b-c-d-e-fCu.sub.aSi.sub.bB.sub.cCr.sub.dSn.sub.eC.sub.f, wherein a, b, c, d, e and f are atomic % meeting 0.80≤a≤1.80, 2.00≤b≤10.00, 11.00≤c≤17.00, 0.10≤d≤2.00, 0.01≤e≤1.50, and 0.10≤f≤0.40.

Provided is a Cu-based alloy powder that is suitable for a process involving rapid melting and rapid solidification and that can provide a shaped object superior in characteristics. The powder is composed of a Cu-based alloy, which contains an element M being one or more elements selected from Cr, Fe, Ni, Zr, and Nb: 0.1% by mass or more and 10.0% by mass or less, Si: more than 0% by mass and 0.20% by mass or less, P: more than 0% by mass and 0.10% by mass or less, and S: more than 0% by mass and 0.10% by mass or less, the balance being Cu and inevitable impurities. This powder has a ratio (D50/TD) of the average particle diameter D50 (μm) thereof to the tap density TD (Mg/m.sup.3) is 0.2×10.sup.−5.Math.m.sup.4/Mg or more and 20×10.sup.−5.Math.m.sup.4/Mg or less, and has a sphericity of 0.80 or more and 0.95 or less.

In the joined body (10) in which the conductor (12) and the substrate (14) are joined by the joining material (13), the joining material (13) includes a sintered body formed by sintering silver powder. A sintered body having a porosity of 8% to 30% and a surface roughness Ra of a joining surface of 500 nm or more and 3.3 μm or less is adopted.