tungsten rhenium comprises

tungsten rhenium comprises

US5186913A - Tungsten-188/carrier-free rhenium-188 ...

A generator system for providing a carrier-free radioisotope in the form of an acid comprises a chromatography column in tandem fluid connection with an ion exchange column, the chromatography column containing a charge of a radioactive parent isotope. The chromatography column, charged with a parent isotope, is eluted with an alkali metal salt solution to generate the radioisotope in the form ...

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FIELD EMISSION CATHODE WITH METALLIC BORIDE

A field emission cathode comprises a hairpin rhenium filament coated with lanthanum boride and with a fine tungsten tip attached to the rhenium filament serves as an efficient source of electrons. The presence of free lanthanum atoms at the tungsten surface lowers the work function and enhances the field emission from the tungsten tip.

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Friction Stir Weld Tools Having Fine Grain Structure ...

In one embodiment, a friction stir weld tool comprises tungsten and rhenium and is characterized by carbide and oxide dispersoids, by carbide particulates, and by grains that comprise a solid solution of the tungsten and rhenium. The grains do not exceed 10 micrometers in diameter. In some embodiments, the grains have a diameter between 100 nm ...

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US20140128912A1 - Tungsten-Rhenium Alloys for Curved ...

Tungsten-Rhenium Alloys for Curved Surgical Needle Applications Download PDF Info Publication number US20140128912A1. US20140128912A1 US14/055,079 US201314055079A US2014128912A1 US 20140128912 A1 US20140128912 A1 US 20140128912A1 US 201314055079 A US201314055079 A US 201314055079A US 2014128912 A1 US2014128912 A1 US 2014128912A1

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QUICK-HEATING IMPREGNATED PLANAR CATHODE -

2. The cathode of claim 1 in which the wire comprises a metal selected from the group consisting of molybdenum, tungsten, an alloy of molybdenum and rhenium, and an alloy of tungsten and rhenium and the inorganic insulation comprises boron nitride. 3. The cathode of claim 2 in which the wire consists of an alloy of molybdenum and rhenium. 4.

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TUNGSTEN ALLOY SUTURE NEEDLES WITH SURFACE

A medical device comprising a tungsten alloy and having a blue, yellow or black surface coloration. 2. The medical device of claim 1, wherein the tungsten alloy comprises at least one or more metals selected from the group consisting of rhenium, tantalum, osmium, or molybdenum. 3. The medical device of claim 2, wherein the tungsten alloy ...

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DTA, DSC, TGA, TGA-DTA/DSC, TGA-EGA, TMA The top

2018-2-19  the use of tungsten-rhenium thermocouples. To produce such a transducer with the SETSYS Evolution DTA 24 analyzer a tungsten bed-plate is machined with two housings for the crucibles. Measurements for the thermal signal and the tem-perature are provided by the tungsten-rhenium thermocouples which ensure rigidity in the DTA rod.

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US6902809B1 - Rhenium tantalum metal alloy - Google

The present invention provides a method for preparing a rhenium-tantalum alloy with improved strength and ductility characteristics. The method includes mixing powders of rhenium and tantalum with a weight ration of approximately 97% rhenium to approximately 3% tantalum. The powdered blend is then compressed to a green state. The green compress of rhenium and tantalum is then sintered such ...

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Process for recovering tungsten from tungsten bearing ...

A process is described for recovering tungsten and rhenium from a relatively impure tungsten and rhenium solution. The process consists of: (a) adjusting the pH of the relatively impure solution to from about 9.0 to about 10.0 to precipitate impurities contained therein and form a purified tungsten and rhenium solution, the pH adjustment from a value below about 9.0 being done with a base, and ...

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Customized High Temperature K S R B Temperature

The rhenium content of the filament is between 0.2-0.4% by weight. A method for manufacturing a rhenium-tungsten filament is also disclosed. The method comprises the following steps. An AKS doped tungsten-rhenium alloy powder is prepared with a rhenium content of 0.2-0.4% by weight. The alloy powder is pressed and pre-sintered, and thereafter ...

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The Parts of the Periodic Table - Angelo State University

2010-5-12  Rhenium is used in alloys with tungsten and molybdenum to make filaments for ovens and lamps, and is also used in electroplating jewelry. It is also used in combination with platinum to make catalysts for generating high-octane gasoline from crude oil. Rhenium was discovered by Walter Noddack, Otto Berg, and Ida Tacke in 1925, as a trace ...

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US20140128912A1 - Tungsten-Rhenium Alloys for Curved ...

Tungsten-Rhenium Alloys for Curved Surgical Needle Applications Download PDF Info Publication number US20140128912A1. US20140128912A1 US14/055,079 US201314055079A US2014128912A1 US 20140128912 A1 US20140128912 A1 US 20140128912A1 US 201314055079 A US201314055079 A US 201314055079A US 2014128912 A1 US2014128912 A1 US 2014128912A1

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Isodiazene complexes: synthesis and molecular structures ...

The tungsten complex 1 has C s symmetry and is octahedral with cis-C 9 H 18 N 2 groups and fac chlorides. The rhenium complexes 3 and 4 are both trigonal bipyramidal with equatorial N and axial Cl atoms. The cation in 5 comprises two edge-sharing distorted octahedra with cis-N and trans-NCMe and a planar symmetrical Re ...

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Discovery, properties and applications of tungsten and its ...

2019-7-24  The five elements niobium, molybdenum, tantalum, rhenium and tungsten are included in all definitions. The wider definition comprises all metals with a melting point above 1850 °C, thereby including also zirconium, chromium, vanadium, rhodium,

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US Patent for Thin-film thermocouple probe and method

2020-12-10  A thin-film thermocouple probe includes a columnar substrate, a tungsten-26% rhenium film and an indium oxide (In2O3) film. A side surface of the columnar substrate is provided with a first straight groove and a second straight groove. The tungsten-26% rhenium film is arranged on a front end surface of the columnar substrate and in the first straight groove.

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Test Contact Finger - LD Microprecision Sdn Bhd.

2021-5-31  Tungsten Rhenium (WR) Tungsten (W) Beryllium Copper (BeCu) Paliney 7 (P7) Sizes: ... This patented concept comprises four(4) chutes specially designed each with three(3) ventilating holes that allow room air draft to be drawn inside to accelerate

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Catalysts and method for reforming oxygenated

2006-12-18  Also disclosed is a reforming catalyst comprising: (a) a carbon support modified with titanium, vanadium, tungsten, rhenium, or a combination thereof and (b) a catalytic composition adhered to the carbon support, the catalytic composition comprising Re, a second metal selected from the group consisting of: Ir, Ni, Pd, Pt, Rh and Ru, and a third ...

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Microfabrication of Tungsten, Molybdenum and

2009-2-14  Microfabrication of Tungsten, Molybdenum and Tungsten Carbide Rods by Laser-Assisted CVD - 3 - 2 Materials properties 2.1 Tungsten and molybdenum The group VI metals, tungsten and molybdenum, have many similar properties. They both crystallise in the body-centred cubic structure (bcc) with as the

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Process for recovering tungsten from tungsten bearing ...

A process is described for recovering tungsten and rhenium from a relatively impure tungsten and rhenium solution. The process consists of: (a) adjusting the pH of the relatively impure solution to from about 9.0 to about 10.0 to precipitate impurities contained therein and form a purified tungsten and rhenium solution, the pH adjustment from a value below about 9.0 being done with a base, and ...

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Isodiazene complexes: synthesis and molecular structures ...

The tungsten complex 1 has C s symmetry and is octahedral with cis-C 9 H 18 N 2 groups and fac chlorides. The rhenium complexes 3 and 4 are both trigonal bipyramidal with equatorial N and axial Cl atoms. The cation in 5 comprises two edge-sharing distorted octahedra with cis-N and trans-NCMe and a planar symmetrical Re ...

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The Parts of the Periodic Table - Angelo State University

2010-5-12  Rhenium is used in alloys with tungsten and molybdenum to make filaments for ovens and lamps, and is also used in electroplating jewelry. It is also used in combination with platinum to make catalysts for generating high-octane gasoline from crude oil. Rhenium was discovered by Walter Noddack, Otto Berg, and Ida Tacke in 1925, as a trace ...

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US Patent for Thin-film thermocouple probe and method

2020-12-10  A thin-film thermocouple probe includes a columnar substrate, a tungsten-26% rhenium film and an indium oxide (In2O3) film. A side surface of the columnar substrate is provided with a first straight groove and a second straight groove. The tungsten-26% rhenium film is arranged on a front end surface of the columnar substrate and in the first straight groove.

Read More

Test Contact Finger - LD Microprecision Sdn Bhd.

2021-5-31  Tungsten Rhenium (WR) Tungsten (W) Beryllium Copper (BeCu) Paliney 7 (P7) Sizes: ... This patented concept comprises four(4) chutes specially designed each with three(3) ventilating holes that allow room air draft to be drawn inside to accelerate

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Refractory metal alloying: A new method for improving ...

2017-6-30  Since no distinction between tungsten and rhenium powders is discernible in the high energy milled (mechanically alloyed) powder, it can be concluded that milling has resulted homogeneous distribution of tungsten and rhenium. Fig. 2a shows the XRD patterns of as received, mixed and milled (mechanically alloyed) tungsten-rhenium powders. The ...

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Discovery, properties and applications of tungsten and its ...

2019-7-24  The five elements niobium, molybdenum, tantalum, rhenium and tungsten are included in all definitions. The wider definition comprises all metals with a melting point above 1850 °C, thereby including also zirconium, chromium, vanadium, rhodium,

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Scarce mineral resources: Extraction, consumption and ...

2021-6-1  Nine resources have an exhaustion period of between 200 and 1000 years: indium, chromium, zinc, nickel, tungsten, tin, rhenium, selenium, and cadmium.-The other mineral resources considered have exhaustion periods of more than 1000 years.- ... The

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Microfabrication of Tungsten, Molybdenum and

2009-2-14  Microfabrication of Tungsten, Molybdenum and Tungsten Carbide Rods by Laser-Assisted CVD - 3 - 2 Materials properties 2.1 Tungsten and molybdenum The group VI metals, tungsten and molybdenum, have many similar properties. They both crystallise in the body-centred cubic structure (bcc) with as the

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Patents Assigned to Ultramet - Justia Patents Search

1991-7-16  Abstract: A structure which is resistant to corrosion at high temperatures comprises a ductile layer of a platinum group metal, such as iridium, and a layer of a refractory metal having a high strength at high temperatures, such as rhenium. A solid solution of the two metals is present between and metallurgically bonded to the two metal layers. Further, the structure may include a layer of ...

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