Abstract: A method for reducing surface roughness of a component according to an example of the present disclosure includes forming a layer of reactive material on a surface of a component, the surface of the component having at least one partially attached particle, whereby the reactive material substantially covers the at least one partially attached particle, and dissolving the reactive material, wherein dissolving the reactive material covering the partially attached particles causes the partially attached particles to break free from the surface of the component, leaving a new smooth surface.

Abstract: A method of making a ceramic matrix composite (CMC) brake component may include the steps of applying a pressure to a mixture comprising ceramic powder and chopped fibers, pulsing an electrical discharge across the mixture to generate a pulsed plasma between particles of the ceramic powder, increasing a temperature applied to the mixture using direct heating to generate the CMC brake component, and reducing the temperature and the pressure applied to the CMC brake component. The ceramic powder may have a micrometer powder size or a nanometer powder size, and the chopped fibers may have an interphase coating.

Abstract: A method for making an article is disclosed. The method involves inputting a digital model of an article into an additive manufacturing apparatus comprising an energy source. The additive manufacturing apparatus applies energy from the energy source to successively applied incremental quantities of a powder to fuse the powder to form the article corresponding to the digital model. The powder includes an aluminum alloy having 2.00-10.00 wt. % cerium, 0.50-2.50 wt. % titanium, 0-3.00 wt. % nickel, 0-0.75 wt. % nitrogen, 0-0.05 wt. % other alloying elements, and the balance of aluminum, based on the total weight of the aluminum alloy.

Abstract: A method for making an article is disclosed. The method involves inputting a digital model of an article into an additive manufacturing apparatus comprising an energy source. The additive manufacturing apparatus applies energy from the energy source to successively applied incremental quantities of a powder to fuse the powder to form the article corresponding to the digital model. The powder includes an aluminum alloy having 2.00-9.00 wt. % cerium, 0.25-3.00 wt. % silicon, 0.25-0.75 wt. % magnesium, 0-0.75 wt. % iron, 0-0.05 wt. % other alloying elements, and the balance of aluminum, based on the total weight of the aluminum alloy.

Abstract: A method of making a ceramic matrix composite (CMC) brake component may include the steps of applying a pressure to a mixture comprising ceramic powder and chopped fibers, pulsing an electrical discharge across the mixture to generate a pulsed plasma between particles of the ceramic powder, increasing a temperature applied to the mixture using direct heating to generate the CMC brake component, and reducing the temperature and the pressure applied to the CMC brake component. The ceramic powder may have a micrometer powder size or a nanometer powder size, and the chopped fibers may have an interphase coating.

Abstract: A flow control device includes a body having an upper portion defining a flow passage extending axially along a primary axis between a first end port and a second end port, the flow passage defining a central cavity between the first and second end ports, and a lower portion defining an axially extending thermal conditioning inlet port and an axially extending thermal conditioning outlet port. A flow control element is disposed in the central cavity and movable to control fluid flow between the first end port and the second end port. The body further includes a thermal conditioning passage having a first vertical portion extending from the thermal conditioning inlet port into the upper portion of the body, a circumferential portion extending from the first vertical portion circumferentially around at least a portion of the flow passage, and a second vertical portion extending vertically from the circumferential portion to the thermal conditioning outlet port.

Abstract: A collet member for fixturing a workpiece includes a monolithic collet body having a clamping block engaging outer wall portion, a workpiece engaging inner wall portion, a plurality of rigid, radially extending members extending between the outer wall and the inner wall to define a plurality of cavities, and a first radial wall on a first axial side of the collet body, defining a first closed end of the plurality of cavities.

Abstract: In accordance with at least one aspect of this disclosure, a structure can include a first body formed from a first material, and a second body disposed on or embedded within the first body. The second body includes a shape memory alloy configured to provide a first stress to the first body in a first state and a second stress to the first body in a second state. The shape memory alloy is configured to transition from the first and second state as a function of an applied activation energy.

Abstract: A method for making an article is disclosed. The method involves first generating a digital model of the article. The digital model is inputted into an additive manufacturing apparatus comprising an energy source. The additive manufacturing apparatus applies energy from the energy source to successively applied incremental quantities of a powder to fuse the powder to form the article corresponding to the digital model. The powder includes an aluminum alloy having 90.15-95.80 wt. % aluminum, 3.00-4.50 wt. % silicon, 0.70-1.50 wt. % magnesium, 0.50-1.00 wt. % manganese, 0-0.50 wt. % iron, 0-0.10 wt. % copper, 0-0.50 wt. % titanium, 0-0.20 wt. % boron, 0-1.50 wt. % nickel, and 0-0.05 wt. % other alloying elements, based on the total weight of the aluminum alloy.

Abstract: A method includes additively manufacturing an article in an inert environment, removing the article from the inert environment and placing the article in a non-inert environment, allowing at least a portion the article to oxidize in the non-inert environment to form an oxidized layer on a surface of the article, and removing the oxidized layer (e.g., to smooth the surface of the article). The method can further include relieving stress in the article (e.g., via heating the article after additive manufacturing).

Abstract: A method includes additively manufacturing an article in an inert environment, removing the article from the inert environment and placing the article in a non-inert environment, allowing at least a portion the article to oxidize in the non-inert environment to form an oxidized layer on a surface of the article, and removing the oxidized layer (e.g., to smooth the surface of the article). The method can further include relieving stress in the article (e.g., via heating the article after additive manufacturing).

Abstract: A method for selecting an alloy for additive manufacturing includes melting a first material and a second material together to create a material melt, spinning the material melt to create melt spun ribbons, welding the ribbons together to produce a weld, and determining a weld quality of the weld.

Abstract: A method for making an article is disclosed. The method involves first generating a digital model of the article. The digital model is inputted into an additive manufacturing apparatus comprising an energy source. The additive manufacturing apparatus applies energy from the energy source to successively applied incremental quantities of a powder to fuse the powder to form the article corresponding to the digital model. The powder includes an aluminum alloy having 78.80-92.00 wt. % aluminum, 5.00-6.00 wt. % copper, 2.50-3.50 wt. % magnesium, 0.50-1.25 wt. % manganese, 0-5.00 wt. % titanium, 0-3.00 wt. % boron, 0-0.15 wt. % vanadium, 0-0.15 wt. % zirconium, and 0-0.25 wt. % silicon, 0-0.25 wt. % iron, 0-0.50 wt. % chromium, 0-1.0 wt. % nickel, and 0-0.15 wt. % other alloying elements, based on the total weight of the aluminum alloy.

Abstract: A method for making an article is disclosed. The method involves first generating a digital model of the article. The digital model is inputted into an additive manufacturing apparatus comprising an energy source. The additive manufacturing apparatus applies energy from the energy source to successively applied incremental quantities of a powder to fuse the powder to form the article corresponding to the digital model. The powder includes an aluminum alloy having 83.35-93.00 wt. % aluminum, 6.00-8.00 wt. % silicon, 1.00-3.00 wt. % magnesium, 0-0.50 wt. % iron, 0-0.50 wt. % manganese, 0-2.00 wt. % titanium, 0-0.50 wt. % boron, 0-1.50 wt. % nickel, 0-0.25 wt. % vanadium, 0-0.25 wt. % zirconium, and 0-0.15 wt. % other alloying elements, based on the total weight of the aluminum alloy.

Abstract: A method for making an article is disclosed. The method involves first generating a digital model of the article. The digital model is inputted into an additive manufacturing apparatus comprising an energy source. The additive manufacturing apparatus applies energy from the energy source to successively applied incremental quantities of a powder to fuse the powder to form the article corresponding to the digital model. The powder includes an aluminum alloy having 85.20-96.40 wt. % aluminum, 2.50-4.00 wt. % magnesium, 0.10-0.50 wt. % copper, 0.50-1.00 wt. % nickel, 0.50-5.50 wt. % zinc, 0-0.15 wt. % chromium, 0-3.00 wt. % titanium, 0-0.50 wt. % boron, and 0-0.15 wt. % other alloying elements, based on the total weight of the aluminum alloy.

Abstract: A method for making an article is disclosed. The method involves first generating a digital model of the article. The digital model is inputted into an additive manufacturing apparatus comprising an energy source. The additive manufacturing apparatus applies energy from the energy source to successively applied incremental quantities of a powder to fuse the powder to form the article corresponding to the digital model. The powder includes an aluminum alloy having 90.15-95.80 wt. % aluminum, 3.00-4.50 wt. % silicon, 0.70-1.50 wt. % magnesium, 0.50-1.00 wt. % manganese, 0-0.50 wt. % iron, 0-0.10 wt. % copper, 0-0.50 wt. % titanium, 0-0.20 wt. % boron, 0-1.50 wt. % nickel, and 0-0.05 wt. % other alloying elements, based on the total weight of the aluminum alloy.

Abstract: A high-strength, lightweight inflatable structure is formed of at least one flexible fabric member that, in an inflated condition, forms a self-supporting structure. The flexible fabric member is formed from a bare fabric having an areal weight of less than 4.5 oz/yd2. The fabric is coated with air-impervious resin coating comprising a polyurethane resin having a mixture of graphene nanoplatelets and a phosphorus-based flame retardant added thereto. The thermally exfoliated graphene nanoplatelets contain residual graphene oxide. Graphene oxide, which is a polar molecule, has an affinity for the polar molecules that make up the phosphorus based flame retardant. Accordingly, in addition to its inherent flame-retardant properties, the phosphorus based flame retardant acts as a dispersant to improve the uniform dispersion of the graphene nanoplatelets within the matrix, thus reducing or eliminating the need to use additional dispersants.

Abstract: A high-strength, lightweight inflatable structure is formed of at least one flexible fabric member that, in an inflated condition, forms a self-supporting structure. The flexible fabric member is formed from a bare fabric having an areal weight of less than 4.5 oz/yd2. The fabric is coated with air-impervious resin coating comprising a polyurethane resin having a mixture of graphene nanoplatelets and a phosphorus-based flame retardant added thereto. The thermally exfoliated graphene nanoplatelets contain residual graphene oxide. Graphene oxide, which is a polar molecule, has an affinity for the polar molecules that make up the phosphorus based flame retardant. Accordingly, in addition to its inherent flame-retardant properties, the phosphorus based flame retardant acts as a dispersant to improve the uniform dispersion of the graphene nanoplatelets within the matrix, thus reducing or eliminating the need to use additional dispersants.

Abstract: A method of inhibiting oxidation of a porous carbon-carbon composite is disclosed and comprises the steps of: (a) contacting the carbon-carbon composite with an oxidation inhibiting composition comprising phosphoric acid or an acid phosphate salt, at least one aluminum salt, and at least one additional metal salt, the oxidation inhibiting composition penetrating at least some of the pores of the carbon-carbon composite; and (b) heating the carbon-carbon composite at a temperature sufficient to form a deposit from the oxidation inhibiting composition within at least some of the penetrated pores of the carbon-carbon composite. The foregoing oxidation inhibiting composition and carbon-carbon composites treated by the foregoing method are also disclosed.

Abstract: A method of inhibiting oxidation of a porous carbon-carbon composite is disclosed and comprises the steps of: (a) contacting the carbon-carbon composite with an oxidation inhibiting composition comprising phosphoric acid or an acid phosphate salt, at least one aluminum salt, and at least one additional metal salt, the oxidation inhibiting composition penetrating at least some of the pores of the carbon-carbon composite; and (b) heating the carbon-carbon composite at a temperature sufficient to form a deposit from the oxidation inhibiting composition within at least some of the penetrated pores of the carbon-carbon composite. The foregoing oxidation inhibiting composition and carbon-carbon composites treated by the foregoing method are also disclosed.