A composite body and a method for producing an integrally cast composite body, which includes at least two zones. A first zone is substantially formed of metal material, and, a second zone additionally includes a non-metallic reinforcing material, such as cement carbide. The composite body is particularly useful for producing products which have at least one wear resistant zone or surface.

A composite body and a method for producing an integrally cast composite body, which includes at least two zones. A first zone is substantially formed of metal material, and, a second zone additionally includes a non-metallic reinforcing material, such as cement carbide. The composite body is particularly useful for producing products which have at least one wear resistant zone or surface.

A structured multi-phase composite which include a metal phase, and a low stiffness, high thermal conductivity phase or encapsulated phase change material, that are arranged to create a composite having high thermal conductivity, having reduced/controlled stiffness, and a low CTE to reduce thermal stresses in the composite when exposed to cyclic thermal loads. The structured multi-phase composite is useful for use in structures such as, but not limited to, high speed engine ducts, exhaust-impinged structures, heat exchangers, electrical boxes, heat sinks, and heat spreaders.

Provided is a metal matrix nanocomposite comprising: (a) a metal or metal alloy as a matrix material; and (b) multiple graphene sheets that are dispersed in said matrix material, wherein said multiple graphene sheets are substantially aligned to be parallel to one another and are in an amount from 0.1% to 95% by volume based on the total nanocomposite volume; wherein the multiple graphene sheets contain single-layer or few-layer graphene sheets selected from pristine graphene, graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, doped graphene, chemically functionalized graphene, or a combination thereof and wherein the chemically functionalized graphene is not graphene oxide. The metal matrix exhibits a combination of exceptional tensile strength, modulus, thermal conductivity, and/or electrical conductivity.

A mechanoactive material includes a composite textile that includes a textile substrate formed from a plurality of fibers assembled in a fiber assembly pattern and a material deposited via an additive manufacturing technique onto and/or between the fibers of the textile substrate based on an additive manufacturing pattern. The composite textile includes at least one prestress and/or residual stress and/or exhibits a change in at least one mechanical property, material property, or structure in response to at least one endogenous and/or exogenous stimulus.

In a metal fiber molded body (40), a ratio, to a presence ratio of metal fibers in a first cross-section, of a presence ratio of metal fibers in a second cross-section orthogonal to the first cross-section is in a range of 0.85 to 1.15. A method for manufacturing the metal fiber molded body (40) according to the present invention includes the steps of: accumulating a plurality of short metal fibers (30) on a receiving part; and sintering the plurality of short metal fibers (30) accumulated on the receiving part, to produce the metal fiber molded body (40).

An iron-based sintered body includes a metal matrix and complex oxide particles contained in the metal matrix. When a main viewing field having an area of 176 μm×226 μm is taken on a cross section of the iron-based sintered body and divided into a 5×5 array of 25 viewing fields each having an area of 35.2 μm×45.2 μm, the complex oxide particles have an average equivalent circle diameter of from 0.3 μm to 2.5 μm inclusive, and a value obtained by dividing the total area of the 25 viewing fields by the total number of complex oxide particles present in the 25 viewing fields is from 10 μm.sup.2/particle to 1,000 μm.sup.2/particle inclusive. The number of viewing fields in which no complex oxide particle is present is 4 or less out of the 25 viewing fields.

An iron-based sintered body includes a metal matrix and complex oxide particles contained in the metal matrix. When a main viewing field having an area of 176 μm×226 μm is taken on a cross section of the iron-based sintered body and divided into a 5×5 array of 25 viewing fields each having an area of 35.2 μm×45.2 μm, the complex oxide particles have an average equivalent circle diameter of from 0.3 μm to 2.5 μm inclusive, and a value obtained by dividing the total area of the 25 viewing fields by the total number of complex oxide particles present in the 25 viewing fields is from 10 μm.sup.2/particle to 1,000 μm.sup.2/particle inclusive. The number of viewing fields in which no complex oxide particle is present is 4 or less out of the 25 viewing fields.

A method of manufacturing metal matrix composite (MMC) parts, including the steps of applying a metallic sheath around a bundle of MMC laminates, heating the bundle of MMC laminates in the metallic sheath at a curing or fusing temperature to consolidate the bundle of MMC laminates into a single cured or fused part, and then cooling the cured or fused part. The bundle of MMC laminates may be formed by removing surface contamination from the dry reinforcement fibers, creating a plurality of individual MMC laminates by plating dry reinforcement fibers with electroless nickel, and/or electrodeposited nickel or cobalt, and stacking each of the plurality of individual MMC laminates into a bundle. Autocatalytic and/or electroplating may be used as the primary means to incorporate fiber reinforcement into the metal matrix composite by covering and bonding fiber reinforcement into MMC laminates/plies and/or 3-D woven parts.

A method may comprise: placing a probe in a molten metal melt comprising a thixotropic metal alloy; injecting a gas into the molten metal melt to form a saturated slurry, the saturated slurry being at a temperature above a liquidus temperature of the thixotropic metal alloy after injecting the gas; removing the probe from the molten metal melt; and depositing the molten metal melt through an extruder of an additive manufacturing system.