The present application relates to a composite material, a method for producing the same, and an electromagnetic-wave shielding sheet comprising the same, which can provide a composite material having excellent impact resistance and processability while having excellent heat dissipation performance, a method for producing the composite material, and an electromagnetic-wave shielding sheet.

The present application provides a composite material and a method for producing the same. The present application can provide a composite material which comprises a metal foam and a polymer component, and has other excellent physical properties such as impact resistance, processability and insulation properties while having excellent thermal conductivity.

A spinal implant including porous and solid portions is disclosed. The implant includes porous portions on upper and lower surfaces and in an interior thereof. Methods of manufacturing and implanting such implants are also disclosed.

The disclosed method includes selecting a suspension ceramic or metal photocurable composition (CPC or MPC); preparing a sacrificial organic material (SOM) forming a photocurable layer destroyed by heating; for manufacturing pieces, on the working tray, forming successive layers of SOM cured by irradiation, the one or more CPC or MPC-based pieces being manufactured by machining a recess in a layer of cured SOM; depositing the CPC or MPC within the recesses; curing the CPC or MPC to obtain a hard horizontal surface level with the adjacent layer of cured SOM, when forming each recess, it is delimited by previously defined patterns, the depth(s) selected in order to ensure the continuity of the one or more pieces to be manufactured; and obtaining one or more green pieces inserted in the SOM, which are subjected to debinding by heating in order to destroy the SOM in which they are trapped.

An oil-impregnated sintered bearing comprises a bearing hole. In the bearing, sliding surfaces supporting an outer circumferential surface of a shaft and an oil supply surface whose diameter is larger than that of the sliding surfaces are formed on an inner circumferential surface of the bearing hole into which the shaft is inserted. The sliding surfaces and the oil supply surfaces are adjacent to each other in the axial direction of the bearing hole. A height gap “d1” between the sliding surfaces and the oil supply surface is not less than 0.01% and not more than 15% of an inner diameter of the sliding surfaces. A surface opening percentage of the sliding surfaces is not higher than 10%. A surface opening percentage of the oil supply surface is higher than 10%. An average circle-equivalent diameter of opening parts of pores on the sliding surfaces is not larger than 20 μm.

A rocket engine with porous structure is disclosed. The rocket engine can include an outer wall, a combustion chamber, a coolant distribution channel defined between the combustion chamber wall and the outer wall, and a manifold. The combustion chamber can have a combustion chamber wall, a first end, a second end opposite to the first end, and a nozzle section disposed at the second end. The manifold can be disposed at the first end of the combustion chamber and have an injector to direct a propellant into the combustion chamber and a coolant inlet to direct a coolant to flow through the coolant distribution channel. The combustion chamber wall can be manufactured through an additive manufacturing process and have a porous section to provide transpiration cooling to the combustion chamber from the coolant that flows through the coolant distribution channel.

The present application relates to a composite material and a method for producing the same, which can provide a composite material having excellent impact resistance or processability and pore characteristics while having excellent heat dissipation performance, and a method for producing the composite material.

A vapor chamber includes a wick structure created by an additive selective laser sintering process. The wick structure includes a substrate, a first copper powder layer, a second copper powder layer, and a plurality of additional layers. The first copper powder layer is deposited across the substrate, wherein the first copper powder layer is subsequently selectively fused via a fusing instrument. The second copper powder layer is deposited across the first copper powder layer, wherein the second copper powder layer is subsequently selectively fused via the fusing instrument. Additionally, a plurality of additional copper powder layers are deposited wherein each additional layer is deposited on the previous layer, wherein each of the additional copper powder layers is selectively fused with a predetermined structure.

The present invention provides a metal foam production method that enables a foaming process to be performed at low cost and enables controlling of the shape of metal foam. According to the present invention, a mold that transmits light and a precursor prepared by mixing a metal with a foaming agent are used, and a metal foam is produced by irradiating the precursor with a light transmitted through the mold to thereby heat and foam the precursor so as to obtain a metal foam, while controlling the shape of the metal foam by the mold.

The present invention provides a metal foam production method that enables a foaming process to be performed at low cost and enables controlling of the shape of metal foam. According to the present invention, a mold that transmits light and a precursor prepared by mixing a metal with a foaming agent are used, and a metal foam is produced by irradiating the precursor with a light transmitted through the mold to thereby heat and foam the precursor so as to obtain a metal foam, while controlling the shape of the metal foam by the mold.