A method for producing a metal structure comprising a porous inter-dendritic matrix defining a network of dendritic channels, the method comprising the steps of: preparing an alloy melt comprising a metal element and at least one alloying element, cooling the alloy melt to a solid alloy, wherein the cooling promotes formation of a network of dendrites rich in the at least one alloying element within an inter-dendritic matrix rich in the metal, dealloying the solid alloy to remove alloying element from the dendrites and the inter-dendritic matrix to obtain the metal structure.

A method for producing a metal structure comprising a porous inter-dendritic matrix defining a network of dendritic channels, the method comprising the steps of: preparing an alloy melt comprising a metal element and at least one alloying element, cooling the alloy melt to a solid alloy, wherein the cooling promotes formation of a network of dendrites rich in the at least one alloying element within an inter-dendritic matrix rich in the metal, dealloying the solid alloy to remove alloying element from the dendrites and the inter-dendritic matrix to obtain the metal structure.

The present disclosure relates to a method for producing a metal carbide, where the method includes thermally treating a molecular precursor in an oxygen-free environment, such that the treating produces the metal carbide and the molecular precursor includes

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where M is the metal of the metal carbide, N* includes nitrogen or a nitrogen-containing functional group, and x is between zero and six, inclusively.

A method for the hydrometallurgical processing of a noble metal-tin alloy consisting of (i) 0.45 to 25% by weight of at least one metal A selected from the group consisting of gold and platinum, (ii), 35 to 99.2% by weight of at least one metal B selected from the group consisting of palladium, silver, and copper, (iii) 0.3 to 30% by weight tin, and (iv) 0 to 50% by weight of at least one element other than gold, platinum, palladium, silver, copper, and tin, and has a weight ratio of metal A:tin of 0.7:1, comprising the steps of:

(a1) specifically selecting a noble metal-tin alloy
or
(a2) specifically producing a noble metal-tin alloy;
(b) dissolving nitric acid-soluble components of the noble metal-tin alloy with nitric acid while forming a nitric acid-containing solution comprising the at least one metal B in the form of the dissolved nitrate, and an undissolved residue;
(c) separating the undissolved residue from the nitric acid-containing solution; and
(d) dissolving the separated residue in a medium that comprises hydrochloric acid and at least one oxidation agent.

The present invention relates to a HEA foam prepared by selective dissolution of a second phase within a two-phase separating alloy comprising the HEA and a manufacturing method thereof. The manufacturing method of the HEA foam of the present invention has the effect of preparing a novel HEA foam, which was not available in the past, by leaving only a first phase after manufacturing a two-phase separating alloy comprising a first phase by HEA, wherein at least 3 metal elements act as a common solvent. Furthermore, the HEA foam of the present invention has a structure, wherein pores are distributed inside the HEA, in which at least 3 metal elements act as a common solvent. By adding a functional characteristic of low heat conductivity, etc., to the existing high strength characteristic of HEA, the HEA foam of the present invention can exhibit a complex effect by the combination of the two particular effects, thereby being capable of exhibiting excellent physical characteristics.

A zinc-plated steel sheet includes a steel sheet having a predetermined chemical composition and a zinc-plated layer. In the steel sheet, steel microstructures in a range of thickness to thickness, having the center at thickness from a steel sheet surface, include, by vol %, ferrite: 0% to 10%, bainite: 0% to 30%, tempered martensite: 50% or more, fresh martensite: 0% to 10%, retained austenite: more than 10% and 30% or less, and pearlite: 0% to 5%. In the zinc-plated steel sheet, the amount of hydrogen emitted when the steel sheet is heated to 200 C. from room temperature after removal of the zinc-plated layer is 0.40 ppm or less per mass of the steel sheet, the tensile strength is 1470 MPa or more, and no cracking occurs in a U-shape bending test where a stress equivalent to 1000 MPa is applied for 24 hours.

A method of making a nanoporous copper is provided. A copper alloy layer and at least one active metal layer are provided. The copper alloy layer comprises a first surface and a second surface. The at least one active metal layer is located on the first surface and the second surface to form a structure. The structure is processed to form a composite structure. A process of folding and pressing the composite structure is repeated to form a precursor. The precursor is corroded to form the nanoporous copper.

An aircraft engine-part including at least a metal substrate and a protective coating for protection against erosion that is present on the substrate, the coating including at least one phase including at least chromium at an atom content greater than or equal to 45% and carbon at an atom content lying in the range 5% to 20%, the phase including Cr.sub.7C.sub.3 and Cr.sub.23C.sub.6 chromium carbides. A method of fabricating such a part in which electroplating is used to deposit a coating composition on the part and the part is subjected to heat treatment at a temperature lying in the range 250 C. to 70 C.

An aircraft engine-part including at least a metal substrate and a protective coating for protection against erosion that is present on the substrate, the coating including at least one phase including at least chromium at an atom content greater than or equal to 45% and carbon at an atom content lying in the range 5% to 20%, the phase including Cr.sub.7C.sub.3 and Cr.sub.23C.sub.6 chromium carbides. A method of fabricating such a part in which electroplating is used to deposit a coating composition on the part and the part is subjected to heat treatment at a temperature lying in the range 250 C. to 70 C.

AlSiMg castings to provide enhanced mechanical properties for structural applications comprising (1) alloy optimisation with 8.5 to 12.5 wt. % Si, 0.46 to 1.0 wt. % Mg, 0.1 to 0.2 wt. % Ti, 0.05 to 0.25 wt. % Mn, 0.01 to 0.02 wt. % Sr, 0.004 to 0.1 wt. % B and other impurity elements of Cu, Fe, Zn each less than 0.15 wt. % and the balance of Al; (2) optimised melt treatment with appropriate melting, modification, degassing and grain refining; (3) appropriate type of grain refiner with optimised amount and method to add into the aluminium melt, and (4) optimised heat treatment process. When being utilized to make shape aluminium alloy castings with gravity casting process, the castings have been achieved the 0.2% offset yield strength of greater than 310 MPa, the ultimate tensile strength of greater than 365 MPa and the elongation of greater than 10%.