Disclosed is a multi-mode laser device for metal manufacturing applications including additive manufacturing (AM), laser cladding, laser welding, laser cutting, laser texturing and laser polishing. The multi-mode laser device configures off-axis, solid-state diode or diode-pumped lasers into an array to perform precision controlled, direct metal deposition printing, cladding, laser welding, laser cutting, laser texturing and laser polishing through a single device. Dual-mode printing, cladding and welding capability using metal wire and powder feedstock sources in the same device is provided with in-line control, precision wire feed driver/controller, adjustable shield gas diffuser, and nozzles tailored to wire feedstock diameter.

Disclosed is a multi-mode laser device for metal manufacturing applications including additive manufacturing (AM), laser cladding, laser welding, laser cutting, laser texturing and laser polishing. The multi-mode laser device configures off-axis, solid-state diode or diode-pumped lasers into an array to perform precision controlled, direct metal deposition printing, cladding, laser welding, laser cutting, laser texturing and laser polishing through a single device. Dual-mode printing, cladding and welding capability using metal wire and powder feedstock sources in the same device is provided with in-line control, precision wire feed driver/controller, adjustable shield gas diffuser, and nozzles tailored to wire feedstock diameter.

A composition for making a composite polycrystalline diamond includes a plurality of diamond particles, a plurality of boron-doped diamond particles, and an additive which is selected from the group consisting of boron oxide powder, nano-carbon material and a combination thereof. Based on the total weight of the composition, the diamond particles are present in an amount that ranges from 0.5 wt % to 99.4 wt %, the boron-doped diamond particles are present in an amount that ranges from 0.5 wt % to 99.4 wt %, and the additive is present in an amount that ranges from 0.1 wt % to 20 wt %. A method for making the composite polycrystalline diamond and a composite polycrystalline diamond made thereby are also disclosed.

A composition for making a composite polycrystalline diamond includes a plurality of diamond particles, a plurality of boron-doped diamond particles, and an additive which is selected from the group consisting of boron oxide powder, nano-carbon material and a combination thereof. Based on the total weight of the composition, the diamond particles are present in an amount that ranges from 0.5 wt % to 99.4 wt %, the boron-doped diamond particles are present in an amount that ranges from 0.5 wt % to 99.4 wt %, and the additive is present in an amount that ranges from 0.1 wt % to 20 wt %. A method for making the composite polycrystalline diamond and a composite polycrystalline diamond made thereby are also disclosed.

The present disclosure relates to a method of preparing a nano-porous powder material. The method includes: firstly removing A in the alloy A.sub.xT.sub.y by using an ultrasonically-assisted de-alloying method to prepare a nano-porous T coarse powder, and then, allowing the nano-porous T coarse powder to perform M-ization reaction with a gas reactant containing M to obtain a nano-porous T-M coarse powder, and finally, further crushing the nano-porous T-M coarse powder using a jet mill to obtain a nano-porous T-M fine powder. The method can achieve low-cost mass production of the nano-porous T-M fine powder, bringing broad application prospects.

The invention relates to a three-dimensional screen printing method for producing a green part from printing material for a powder metallurgical component, wherein the printing material contains a fraction of powder, more particularly metal powder or ceramic powder, and binder or consists of these materials, characterized in that a screen printing mask has a screen printing structure having openings for pressing the printing material through, the openings being partly undulate so that the green part at least partly has a three-dimensional undulate structure and/or undulate edges.

The invention relates to a three-dimensional screen printing method for producing a green part from printing material for a powder metallurgical component, wherein the printing material contains a fraction of powder, more particularly metal powder or ceramic powder, and binder or consists of these materials, characterized in that a screen printing mask has a screen printing structure having openings for pressing the printing material through, the openings being partly undulate so that the green part at least partly has a three-dimensional undulate structure and/or undulate edges.

Provided is a print head, a system and method for pressure measurements and continuous control of a flowable material in a flow path. The system includes a pressure coupler comprising a body having a channel through the longitudinal center of the body, the channel spanning between a first opening and a second opening. The pressure coupler includes a membrane embedded in the body, wherein the membrane is contiguous with, and forms a region of, the channel. Material flowing through the channel imparts a force on the membrane, and the force is transferred from the membrane to a pressure sensor adjacent to the pressure coupler. The pressure coupler and sensor may be included in a print head, whereby the pressure of a flowable material is measured during dispensing from the print head. The pressure measurements are used for continuous feedback flow control of the flowable material through the flow path.

Provided is a print head, a system and method for pressure measurements and continuous control of a flowable material in a flow path. The system includes a pressure coupler comprising a body having a channel through the longitudinal center of the body, the channel spanning between a first opening and a second opening. The pressure coupler includes a membrane embedded in the body, wherein the membrane is contiguous with, and forms a region of, the channel. Material flowing through the channel imparts a force on the membrane, and the force is transferred from the membrane to a pressure sensor adjacent to the pressure coupler. The pressure coupler and sensor may be included in a print head, whereby the pressure of a flowable material is measured during dispensing from the print head. The pressure measurements are used for continuous feedback flow control of the flowable material through the flow path.

There are provided an inexpensive copper powder, which has a low content of oxygen even it has a small particle diameter and which has a high shrinkage starting temperature when it is heated, and a method for producing the same. While a molten metal of copper heated to a temperature, which is higher than the melting point of copper by 250 to 700° C. (preferably 350 to 650° C. and more preferably 450 to 600° C.), is allowed to drop, a high-pressure water is sprayed onto the heated molten metal of copper in a non-oxidizing atmosphere (such as an atmosphere of nitrogen, argon, hydrogen or carbon monoxide) to rapidly cool and solidify the heated molten metal of copper to produce a copper powder which has an average particle diameter of 1 to 10 μm and a crystallite diameter Dx.sub.(200) of not less than 40 nm on (200) plane thereof, the content of oxygen in the copper powder being 0.7% by weight or less.