Provided is a process for preparing a molybdenum alloy by ultra-high-temperature rolling. The molybdenum alloy is an ultra-high strength and toughness molybdenum alloy, and includes 95 wt % to 99.9 wt % of molybdenum and 0.1 wt % to 5 wt % of a nano-ceramic oxide particle. The process includes: (1) preparing an MOxSO.sub.3H aqueous solution; (2) preparing a precursor composite powder; (3) preparing a nano-ceramic oxide-reinforced molybdenum alloy powder by reduction; and (4) preparing the ultra-high strength and toughness molybdenum alloy by pressing and sintering.

The present invention relates to a method for manufacturing a heterogeneous composite material thin plate and a heterogeneous composite material thin plate manufactured by same, the method comprising the steps of: (a) ball-milling an aluminum or aluminum alloy powder and a carbon nanotube powder so as to prepare a composite powder; (b) preparing a multi-layered billet comprising the composite powder, the multi-layered billet characterized by comprising a core layer and two or more shell layers surrounding the core layer, wherein the core layer is made of the composite powder or an aluminum alloy, the shell layers excluding the outermost shell layer are made of the composite powder, and the outermost shell layer is made of (i) an aluminum or aluminum alloy powder or (ii) the composite powder; and (c) rolling the multi-layered billet so as to form a thin plate shape.

A high-strength multi-functional coating with a multi-level structure, and a preparation method thereof are provided. In this application, a high-efficiency cladding method based on infrared laser-plasma synchronous compounding is adopted to prepare a micro-scale columnar crystal structure that is perpendicular to a substrate and serves as a pure thermally and electrically conductive channel, and to prepare submicro- and nano-scale ceramic reinforcement phases between columnar crystals, where the submicro- and nano-scale ceramic reinforcement phases are distributed along grain boundaries. The multi-level organizational structure of this application can simultaneously improve the hardness, wear resistance, and electrical and thermal conductivities of a cladding layer for a copper alloy and can improve the reliability of damage protection for a copper alloy component used in an extreme environment.

A method for preparing a nano-phase strengthened nickel-based superalloy using micron-scale ceramic particles is provided. In the method, a nickel-based superalloy is used as a matrix, and one or more of TiC, TiB.sub.2, WC and Al.sub.2O.sub.3 are used as a strengthening phase. A ceramic particle raw material used as the strengthening phase has a particle size of 1-5 m and is added in an amount of 1-5 wt. %. A nickel-based superalloy composite powder having homogeneously distributed nano-scale ceramic is prepared by mechanical milling. A nano-scale ceramic phase strengthened nickel-based superalloy is prepared by 3D printing technology, which has a homogeneously distributed nano-scale ceramic phase and excellent mechanical properties.

A method for preparing a nano-phase strengthened nickel-based superalloy using micron-scale ceramic particles is provided. In the method, a nickel-based superalloy is used as a matrix, and one or more of TiC, TiB.sub.2, WC and Al.sub.2O.sub.3 are used as a strengthening phase. A ceramic particle raw material used as the strengthening phase has a particle size of 1-5 m and is added in an amount of 1-5 wt. %. A nickel-based superalloy composite powder having homogeneously distributed nano-scale ceramic is prepared by mechanical milling. A nano-scale ceramic phase strengthened nickel-based superalloy is prepared by 3D printing technology, which has a homogeneously distributed nano-scale ceramic phase and excellent mechanical properties.

A copper alloy for sliding members constituting a sliding layer has a component composition containing not less than 0.4 mass % and not more than 6 mass % Mn, not less than 0.3 mass % and not more than 5 mass % Fe, not less than 0.3 mass % and not more than 3.5 mass % S, and not less than 1 mass % and not more than 15 mass % Sn, with the balance being Cu and unavoidable impurities. The copper alloy for sliding members has a structure including a matrix made of bronze and a complex sulfide phase dispersed in the matrix, the complex sulfide phase containing not less than 40 atom % and not more than 75 atom % Mn, not less than 3 atom % and not more than 30 atom % Fe, and not less than 1 atom % and not more than 55 atom % S.

A copper alloy for sliding members constituting a sliding layer has a component composition containing not less than 0.4 mass % and not more than 6 mass % Mn, not less than 0.3 mass % and not more than 5 mass % Fe, not less than 0.3 mass % and not more than 3.5 mass % S, and not less than 1 mass % and not more than 15 mass % Sn, with the balance being Cu and unavoidable impurities. The copper alloy for sliding members has a structure including a matrix made of bronze and a complex sulfide phase dispersed in the matrix, the complex sulfide phase containing not less than 40 atom % and not more than 75 atom % Mn, not less than 3 atom % and not more than 30 atom % Fe, and not less than 1 atom % and not more than 55 atom % S.

A nano-structured alloy material includes a nanoparticle; a matrix phase surrounding the nanoparticle; and an alkali/alkali Earth metal (i) which is incorporated into the nanoparticle, (ii) which may also be incorporated into the matrix and therefore alter a material property of the matrix phase 120, and (iii) an interaction of the nanoparticle with the matrix phase.

A nano-structured alloy material includes a nanoparticle; a matrix phase surrounding the nanoparticle; and an alkali/alkali Earth metal (i) which is incorporated into the nanoparticle, (ii) which may also be incorporated into the matrix and therefore alter a material property of the matrix phase 120, and (iii) an interaction of the nanoparticle with the matrix phase.

A nanocomposite including silicon (Si) and gallium arsenide (GaAs), infrared (IR) windows including the nanocomposite, methods of making the nanocomposite, and methods of using the nanocomposite.