1203 results about "Intermetallic" patented technology

The present invention provides a method for forming a refractory metal-intermetallic composite. The method includes providing a first powder comprising a refractory metal suitable for forming a metal phase; providing a second powder comprising a silicide precursor suitable for forming an intermetallic phase; blending the first powder and the second powder to form a powder blend; consolidating and mechanically deforming the powder blend at a first temperature; and reacting the powder blend at a second temperature to form the metal phase and the intermetallic phase of the refractory metal-intermetallic composite, wherein the second temperature is higher than the first temperature.

Provided are a Zn coated steel material, a Zn coated steel sheet and a painted steel sheet excellent in corrosion resistance, and a method of producing the same. Specifically, there is provided coated steel material excellent in corrosion resistance and a method of producing the same, which coated steel material is characterized in that it has, on the surface of steel sheet, a Zn-alloy coating layer containing 1 - 10 wt% of Mg, 2 - 19 wt% of Al and 0.01 - 2 wt% of Si, where Mg and Al satisfy Mg(%) + Al(%) ≤ 20%, the balance being composed of Zn and unavoidable impurities, and has a coating layer structure of a Mg intermetallic compound or the like. As a base metal treatment, it is preferably provided with a Ni coating layer. Also provided are a coated Zn coated steel sheet provided on the coating layer with, as an intermediate layer, a chromate film layer, and further with, as an upper layer, an organic coating layer, and a Zn coated steel sheet excellent in corrosion resistance provided on the coating layer with, as an upper layer, a chromate film, formed by coating with a resin chromate bath and drying, at 10 - 300 mg / m<2> as metallic chromium. The Zn-alloy coating layer according to the present invention may further contain one or more of 0.01 - 1 wt% of In, 0.01 - 1 wt% of Bi and 1 - 10 wt% of Sn. Further provided is a painted steel sheet having on the Zn-alloy coating layer a base metal treatment film layer containing 100 parts by weight of resin as solid content and 0.2 - 50 parts by weight of tannin or tannic acid and on the base metal treatment film layer, as an upper layer, an organic coating layer. Preferably the Zn-alloy coating layer further contains 0.01 - 2 wt% of Si, the base metal treatment film layer further contains 10 - 500 parts by weight of fine-grain silica as solid content, the organic coating layer is composed of an undercoating containing an anti-rust pigment and a colored overcoating, and a Ni coating layer is present under the zn-alloy coating layer. Further provided is a painted steel sheet having a base metal treatment film layer containing 100 parts by weight of resin as solid content and 0.1 - 3,000 parts by weight of a silane coupling agent and on the base metal treatment film layer, as an upper layer, an organic coating layer. The Zn-alloy coating layer can contain 0.01 - 2 wt% of Si and the base metal treatment film layer can further contain, as solid content, one or both of 1 - 200 parts by weight of fine-grain silica and 0.1 - 1,000 parts by weight of an etching fluoride. Moreover, a structure is present wherein intermetallic compound phase of 1 mu m or greater major diameter is dispersed in the Zn-alloy coating layer at a content of 0.1 - 50 vol%.

The production of ultrafine metal carbide powders from polymeric powder and metallic precursor powder starting materials is disclosed. In certain embodiments, the polymeric powder may comprise polypropylene, polyethylene, polystyrene, polyester, polybutylene, nylon, polymethylpentene and the like. The metal precursor powder may comprise pure metals, metal alloys, intermetallics and / or metal-containing compounds such as metal oxides and nitrides. In one embodiment, the metal precursor powder comprises a silicon-containing material, and the ultrafine powders comprise SiC. The polymeric and metal precursor powders are fed together or separately to a plasma system where the feed materials react to form metal carbides in the form of ultrafine particles.