A multi-layer sliding bearing element made from a composite material includes a supporting metal layer and a further layer formed of a cast alloy of a leadfree copper base alloy, in which sulfide precipitates are contained. The copper base alloy contains between 0.1 wt. % and 3 wt. % sulfur, between 0.01 wt. % and 4 wt. % iron, up to 2 wt. % phosphorus, at least one element from a first group consisting of zinc, tin, aluminum, manganese, nickel, silicon, chromium, indium of in total between 0.1 wt. % and 49 wt. %, and at least one element from a second group consisting of silver, magnesium, indium, cobalt, titanium, zirconium, arsenic, lithium, yttrium, calcium, vanadium, molybdenum, tungsten, antimony, selenium, tellurium, bismuth, niobium, palladium, wherein the summary proportion of the elements of the second group amounts to between 0 wt. % and 2 wt. %, and the balance is constituted by copper.

A metal matrix composite is provided, including a metal, inorganic particles, and discontinuous fibers. The inorganic particles and the discontinuous fibers are dispersed in the metal. The metal includes aluminum, magnesium, or alloys thereof. The inorganic particles have an envelope density that is at least 30% less than a density of the metal. The metal matrix composite has a lower envelope density than the matrix metal while retaining a substantial amount of the mechanical properties of the metal.

Embodiments of the disclosure relate to a binder-free, sintered friction lining, for a friction component of a friction assembly, having a friction lining body, which comprises a metallic matrix, at least one abrasive, solid lubricants, and optionally at least one filling material, wherein the solid lubricants are formed by at least two different solid lubricants, which are selected from a group consisting of hexagonal boron nitride and metal sulfides with at least one metal from the group of tungsten, iron, tin, copper, bismuth, antimony, chromium, zinc, silver, manganese, molybdenum.

A composite containing hollow ceramic spheres and a preparation method are provided. The composite includes an impact-resistant gradient complex part containing a hollow ceramic sphere complex, prepared by using a 3D printing method and a hollow ceramic sphere-high polymer complex dielectric material obtained in a blending and fusing way. The obtained composite has the characteristics of relatively low density and high strength. The impact-resistant gradient complex part is a layered complex, the composition and properties of the complex may be regulated in a direction vertical to a layer according to a design, for example, mechanical properties of the complex are transitioned from soft to hard to form gradient change by regulating the change of the composition, and meanwhile, the thickness among layers with different properties is accurately controlled as required. The dielectric, heat conducting and mechanical properties of the hollow ceramic sphere-high polymer complex dielectric material are greatly improved.

The sintered electrical contact material described in this specification includes at least one salt dispersed within a silver matrix, and no more than 100 ppm of cadmium and cadmium compounds. The sintered electrical contact material exhibit contact resistances much lower than commercially available silver composites. The salts dispersed within the silver matrix represent a new class of additives for silver composites for high and low current applications.

A 3D printing method includes mixing a sintered component which is selected from the group comprising ceramic materials, ceramic material combinations, metal materials, metal material combinations and metal alloys, with at least one surface coating component which is selected from the group comprising boron nitride, graphene, carbon nanotubes, tungsten sulfide, tungsten carbide, molybdenum sulfide, molybdenum carbide, calcium fluoride, caesium molybdenum oxide sulfide, titanium silicon carbide and cerium fluoride, in a powder mixture; and laser sintering or laser melting the powder mixture in a selective laser sintering method or a selective laser melting method.

A method of making a metallic alloy, more particularly, a high-entropy alloy with a composite structure that exhibits high strength and good ductility, and is used as a component material in electromagnetic, chemical, shipbuilding, machinery, and other applications, and in extreme environments, and the like.

A metallic alloy, more particularly, a high-entropy alloy with a composite structure exhibits high strength and good ductility, and is used as a component material in electromagnetic, chemical, shipbuilding, machinery, and other applications, and in extreme environments, and the like.

The present invention is related to hierarchical composite wear component comprising a reinforced part, said reinforced part comprising a reinforcement of a triply periodic minimal surface ceramic lattice structure, said structure comprising multiple cell units, said cell units comprising voids and micro-porous ceramic cell walls, the micro-pores of the cell walls comprising a sinter metal or a cast metal, the ceramic lattice structure being embedded in a bicontinuous structure with a cast metal matrix.

Neutron shielding comprising a metal-hydride metal composite: the metal-hydride metal composite comprising: a metal matrix; and a plurality of metal-hydride particles dispersed within the metal matrix; wherein, the fraction of metal-hydride in the metal-hydride metal composite is at least 1 mol % and the volume fraction of metal-hydride in the metal hydride metal composite is no higher than the ratio of the solid solubility limit of hydrogen in the metal matrix and the molar fraction of hydrogen in the metal-hydride.