In a specific aspect of the invention the alloy comprises about 77% molybdenum, 13% rhenium, and 10% tungsten by weight, and about 50 to 100 ppm of carbon. When converted into atomic %, this alloy corresponds to about 86.6% molybdenum, 7.5% rhenium and 5.9% tungsten.
can comprise elemental or alloyed tungsten, molybdenum, rhenium or niobium and is characterized by flowable agglom- erated particles consisting of crystallites averaging less than 200 nm in size. Typically, the crystallites average 30-60 nm in size. In preferred embodiments, the …
Jun 12, 2013· John L. Potts has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Un filament de tungstène rhénium est formée, qui a une structure cristalline metalstable, et est recuite en dessous de la température de recristallisation, et recristallisé à la température de cristallisation.
Spectral normal emissivities were acquired at a wavelength of 0.65 ώm for a series of tungsten-rhenium alloys, tungsten-osmium alloys, and tungsten-iridium alloys in the temperature range 1400 to ...
SUBSTANCE: method comprises steps of processing waste material of rhenium or molybdenum in ammonia electrolytes while using waste material as electrode onto which alternating electric current of commercial frequency is applied. At processing operation small plates of tantalum or niobium are used as second electrode.
The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties.The structure of the table shows periodic trends.The seven rows of the table, called periods, generally have metals on the left and non-metals on the right.
Jan 01, 1999· The Thermal Spray Laboratory at NASA's Marshall Space Flight Center has developed and demonstrated a fabrication technique using Vacuum Plasma Spray (VPS) to form structural components from a tungsten/rhenium alloy. The components were assembled into an absorber cavity for a fully-functioning, ground test unit of a solar then-nal propulsion engine.
Dec 19, 1995· This invention particularly concerns rhenium-bound tungsten carbide, rhenium-bound hafnium carbide and rhenium-bound titanium carbide metal matrix composites. This invention more particularly concerns the use of substantially pure rhenium metal as a binder for tungsten carbide, hafnium carbide or titanium carbide.
For the high-resolution devices used in general X-ray applications, mammography, angiography and computed tomography, we develop and manufacture extremely robust X-ray anodes and components for X-ray tubes. We supply anodes made from molybdenum alloys such as TZM and MHC with focal tracks consisting of various tungsten-rhenium alloys.
SUPERPLASTICITY IN TUNGSTEN-RHENIUM ALLOYS by M. Garfinkle, W. R. Witzke, and W. D. Klopp Lewis Research Center SUMMARY The tensile properties of binary tungsten-rhenium alloys containing up to 33-atomic percent rhenium were determined at temperatures from 78° to 3630° F (25° to 2000° C).
Rhenium improves the properties of tungsten. Tungsten-rhenium alloys are more ductile at low temperature, allowing them to be more easily machined. The high-temperature stability is also improved. The effect increases with the rhenium concentration, and therefore tungsten alloys are produced with up to 27% of Re, which is the solubility limit.
Aug 26, 2013· Mission Mining Company Holds Possibly the World's Largest Known Rhenium Deposit at its California El Dorado Mine LAS VEGAS--(BUSINESS WIRE)-- Mission Mining Company (OTC Pink:MISM) -
This comprises the investigation of vacuum plasma-sprayed coatings, physical vapour deposited tungsten/rhenium multilayers, as well as coatings deposited by …
Tungsten powder was sprayed on graphite mandrels to a nominal thickness of 1.65 mm (0.065 inch). Full size mandrels measured 457 mm (18 inches) long by 64 mm (2.5 inch) in diameter. After tungsten was sprayed on the mandrels, they were cross sectioned, mounted, and metallurgically examined. It was found that the tungsten aensity varied from 85% ...
Tungsten-Rhenium (WRe) Historically Tungsten 25% Rhenium alloy has been produced into wire for the thermocouple market, but recent demands for high temperature structural components have forced the development of novel processing techniques for Tungsten-Rhenium and Tungsten-Rhenium with hafnium carbide.
About Alloys. Alloys are technically solid solutions consisting of a metal and at least one other element. In the microstructure of an alloy, the component elements may or may not be homogenously distributed, and the crystal structure may vary throughout the material, or may be consistent, depending on the thermal history of the material.
Tungsten Db 105 Dubnium Sg 106 Seaborgium Rocket Engines Re 75 Rhenium Pen Points Os 76 Osmium Bh 107 Bohrium Hs 108 Hassium Spark Plugs Ir 77 Iridium Labware Pt 78 Platinum Mt 109 Meitnerium 110 Jewelry Au 79 Gold Thermometers Hg 80 Mercury 111 112 Low-Temperature Thermometers Tl 81 Thallium Weights Pb 82 Lead 113 114 Fire Sprinklers Bi 83 ...
Start studying Radiation Protection Ch. 3. Learn vocabulary, terms, and more with flashcards, games, and other study tools. ... Tungsten  and rhenium  have: High melting points ... Radiation Protection Ch. 2 102 Terms. hzeidan. Radiation Protection Ch. 4 140 Terms.
ATL's involvement includes a variety of known CVD products and the development of new techniques. The coatings being used include erbium oxide, rhenium, tungsten, silicon carbide, silicon nitride, aluminium, tungsten silicide and other diffusion coatings involving aluminium and silicon.
UHV Heater Modules Welcome to the Kurt J. Lesker Company. Sign ... They comprise CVD processed heating elements packaged in refractory metal cases. ... Type C (Tungsten/Rhenium) thermocouples are provided as standard. For applications in which the use of Tungsten or Rhenium would be undesirable, a type K (Chromel/Alumel) thermocouple can be ...
Jul 04, 2010· Tungsten–rhenium thermocouple types C, D, and G comprise a third category of thermocouples, refractory metal thermocouples, which were developed to be used at high temperatures, in reduced atmosphere or vacuum environments, and should never be used in the presence of oxygen at temperatures above 260°C due to high reaction rates.
Comparative ten-vertex metallaborane chemistry: some nido-6-metalladecaboranes of tungsten, rhenium, ruthenium, osmium, and iridium; including the crystal and molecular structures of ... The structure comprises nido-decaborane-like molecules in which the 6-BH unit has been subrogated by the isolobal Os(PMe 2 Ph) 3 unit.
Start studying Principles of Radiographic Exposure. Learn vocabulary, terms, and more with flashcards, games, and other study tools. ... -It comprises a filament and a focusing cup. ... a tungsten and rhenium alloy. The layer or track is then embedded in.
costly, tungsten-rhenium alloys. Pugh et al. (ref. 5) have demonstrated that this is the case with fine wire of doped tungsten made by powder metallurgy techniques. In a pre-vious study (ref. 6), room-temperature bend ductility in worked sheet fabricated from electron-beam-melted tungsten alloys with 2 and 6 percent rhenium was observed.
Tungsten-Rhenium thermocouple Tungsten-Rhenium thermocouples can be used at very high temperatures, up to 2315 °C. The more common type comprises 95% tungsten, 5 % rhenium versus 74% tungsten, 26% rhenium. This is sometimes referred to as W5Re/W26Re or letter-designated type C. ASTM standard E 988-96 gives
The rhenium content of the filament is between 0.2-0.4percent by weight. A method for manufacturing a rhenium-tungsten filament comprises the following steps. An AKS doped tungsten-rhenium alloy powder is prepared with a rhenium content of 0.2-0.4% by weight.
ΗTLE ALLOYS OF MOLYBDENUM, RHENIUM AND TUNGSTEN. FIELD OF THE INVENTION. ... In a specific aspect of the invention the alloy comprises about 77% molybdenum, 13% rhenium, and 10% tungsten by weight, and about 50 to 100 ppm of carbon. When converted into atomic %, this alloy corresponds to about 86.6% molybdenum, 7.5 % rhenium and 5.9% tungsten. ...
Base metal thermocouples are known as Types E, J, K, T and N and comprise the most commonly used category of Thermocouple. The conductor materials in base metal thermocouples are made of common and inexpensive metals such as Nickel, ... Type D (Tungsten 3% Rhenium/Tungsten 26% Rhenium)
Manganese comprises about 1000 ppm (0.1%) of the Earth's crust, the 12th most abundant of the crust's elements. Soil contains 7–9000 ppm of manganese with an average of 440 ppm. Seawater has only 10 ppm manganese and the atmosphere contains 0.01 µg/m 3.
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 ...
Tungsten applications in the automotive sector comprise short lead-time, one-off components, such as in the motor sport sector and long run, standard parts for engine and transmission OEMs for series production. All types of requirement can be accommodated within the tungsten organisation and quality standards and customer service levels remain consistent for each type of customer.
Dec 03, 2018· Cobalt-chromium-tungsten alloys are known as stellites. These are corrosion and wear resistant alloys which are used for bearings, valve seats, pistons, and applications where a tough wear resistant material is required. Superalloys are cobalt, nickel or iron-based alloys with high contents of molybdenum, tungsten, rhenium, and tantalum.