The present disclosure provides a magnesium alloy and a preparation method and an application thereof. Based on the total weight of the magnesium alloy, the magnesium alloy includes 0.8-1.4 wt % of rare earth element, 0.01-0.2 wt % of R, 0.8-1.5 wt % of Mn, 0-0.01 wt % of Fe, 0-0.01 wt % of Cu, 0-0.01 wt % of Ni, 0-0.01 wt % of Co, 0-0.01 wt % of Sn, 0-0.01 wt % of Ca, and 96.84-98.39 wt % of Mg, wherein R is at least one selected from Al and Zn.

A powder metal compact is disclosed. The powder metal compact includes a cellular nanomatrix comprising a nanomatrix material. The powder metal compact also includes a plurality of dispersed particles comprising a particle core material that comprises an Mg—Zr, Mg—Zn—Zr, Mg—Al—Zn—Mn, Mg—Zn—Cu—Mn or Mg—W alloy, or a combination thereof, dispersed in the cellular nanomatrix.

A powder metal compact is disclosed. The powder metal compact includes a cellular nanomatrix comprising a nanomatrix material. The powder metal compact also includes a plurality of dispersed particles comprising a particle core material that comprises an Mg—Zr, Mg—Zn—Zr, Mg—Al—Zn—Mn, Mg—Zn—Cu—Mn or Mg—W alloy, or a combination thereof, dispersed in the cellular nanomatrix.

A castable, moldable, and/or extrudable structure using a metallic primary alloy. One or more additives are added to the metallic primary alloy so that in situ galvanically-active reinforcement particles are formed in the melt or on cooling from the melt. The composite contain an optimal composition and morphology to achieve a specific galvanic corrosion rate in the entire composite. The in situ formed galvanically-active particles can be used to enhance mechanical properties of the composite, such as ductility and/or tensile strength. The final casting can also be enhanced by heat treatment, as well as deformation processing such as extrusion, forging, or rolling, to further improve the strength of the final composite over the as-cast material.

A p-type thermoelectric material according to one aspect of the present invention is configured such that at least any one of a Mg site, a Si site, a Sn site and/or a Ge site in a compound composed of magnesium (Mg), silicon (Si), tin (Sn) and germanium (Ge) is substituted with any one or more elements selected from the group consisting of alkali metals of group 1A and gold (Au), silver (Ag), copper (Cu), zinc (Zn), calcium (Ca) and gallium (Ga) of group 1B.

A metal composite comprises: a first matrix comprising magnesium, a magnesium alloy, or a combination thereof; a second matrix comprising aluminum, an aluminum alloy, steel, a zinc alloy, a tin alloy, or a combination comprising at least one of the foregoing; a corrosion reinforcement material; and a boundary layer disposed between the first matrix and the second matrix; wherein the boundary layer has a thickness of 10 nm to 200 μm.

A metal composite comprises: a first matrix comprising magnesium, a magnesium alloy, or a combination thereof; a second matrix comprising aluminum, an aluminum alloy, steel, a zinc alloy, a tin alloy, or a combination comprising at least one of the foregoing; a corrosion reinforcement material; and a boundary layer disposed between the first matrix and the second matrix; wherein the boundary layer has a thickness of 10 nm to 200 μm.

A method of making a light weight component is provided. The method including the steps of: forming a metallic foam core into a desired configuration; inserting a pre-machined component into an opening in the metallic foam core; applying an external metallic shell to an exterior surface of the metallic foam core after it has been formed into the desired configuration and after the pre-machined component has been inserted into the metallic foam core; introducing an acid into an internal cavity defined by the external metallic shell; dissolving the metallic foam core; and removing the dissolved metallic foam core from the internal cavity, wherein the component and the external metallic shell are resistant to the acid.

A method of making a light weight component is provided. The method including the steps of: forming a metallic foam core into a desired configuration; inserting a pre-machined component into an opening in the metallic foam core; applying an external metallic shell to an exterior surface of the metallic foam core after it has been formed into the desired configuration and after the pre-machined component has been inserted into the metallic foam core; introducing an acid into an internal cavity defined by the external metallic shell; dissolving the metallic foam core; and removing the dissolved metallic foam core from the internal cavity, wherein the component and the external metallic shell are resistant to the acid.

A magnesium alloy contains, in mass %, from 1% to 12% inclusive of Al and from 0.1% to 5% inclusive of Mn and has a structure in which particles of compounds containing Al and Mn are dispersed. The average diameter of the particles of the compounds is from 0.3 μm to 1 μm inclusive, and the area ratio of the particles of the compounds is from 3.5% to 25% inclusive.