Binary rhenium alloys

a technology of rhenium alloys and tungsten alloys, which is applied in the field of forming rheniumtungsten alloys, can solve the problems of high-purity rhenium metals that fail in such testing at the grain boundary, and achieve the effects of improving mechanical properties, reducing ductility, and improving ductility
US20050238522A1Inactive Publication Date: 2005-10-27RHENIUM ALLOYS
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
RHENIUM ALLOYS
Publication Date
2005-10-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

Rhenium-tungsten alloys including rhenium and from about 0.025% to less than about 10% by weight tungsten. The rhenium-tungsten alloys are formed by a process that includes coating rhenium metal powders with a liquid including a tungsten compound, drying the coated rhenium powder, compressing the dried coated powder to form a compact, and then sintering the compact to form the rhenium-tungsten alloy. The rhenium-tungsten alloys according to the invention exhibit mechanical properties that are superior to high-purity rhenium metal without a loss in ductility.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of Invention

[0002] The present invention relates to a process of forming rhenium-tungsten alloys that exhibit exceptional mechanical properties and rhenium-tungsten alloys formed according to the process.

[0003] 2. Description of Related Art

[0004] Rhenium has a very high melting point (mp 3180° C.), no known ductile to brittle transition temperature, excellent chemical resistance and high electrical resistivity over a wide temperature range. It is sold in the form of foil, sheet, plate, ribbon, wire, rod and powders for use in a variety of applications, particularly in the lighting and aerospace industry.

[0005] Rhenium is derived primarily from the roasting of molybdenum concentrates generated in the copper mining industry. During the roasting of molybdenite, rhenium is oxidized and carried off in the flue gases. These gases are scrubbed to remove the rhenium, which is then recovered in solution using an ion exchange process. The rheniu...

Claims

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