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The oxygen content of Mo-25wt.% Re specimens printed in argon-3% hydrogen was surprisingly lower than the 5 wt.% or 10 wt.% compositions. High amounts of rhenium may alter the interaction between molybdenum and the infiltrating oxygen. Mechanical Testing. Molybdenum, like tungsten, is a brittle material prone to failure by …
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Tungsten alloy with addition of rhenium and tantalum was prepared by laser sintering. Microstructure and properties of the samples were tested by optical microscope, X-ray diffractometer and ...
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A study was made of the mechanical properties of vacuum arc-melted tungsten and tungsten-rhenium alloys in the temperature range 77O to 810' K. The ductile-brittle transition temperature of the unalloyed recrystallized tungsten prepared for this study was 490' K and was reduced to 430' and 350' K by additions of 2 and 25 percent rhenium
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At your quoted prices, the relative proportions of Pt and W needed to give gold density is 0,98552 : 0,0144796. This mixture, at your prices, would cost $806 a kilogram: far better than Rhenium. Of course an alloy could be more …
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Alloying experiments were performed using rhenium additions to a classic 90 mass % tungsten heavy alloy. The mixed-powder system was liquid phase sintered to full density …
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Rhenium is an chemical element with atomic number 75. It is frequently used with tungsten because it adds favorable properties. It is also used for filaments in mass spectrographs.
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A narrowly defined class of refractory metals would include metals with melting points > 2000°C: niobium, chromium molybdenum, tantalum, tungsten, and rhenium [1], while a wider class would also include those with melting points above 1850°C: vanadium, hafnium, titanium, zirconium, ruthenium, osmium, rhodium, and iridium.
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Rhenium-188 (188 Re) is a high energy beta-emitting radioisotope with a short 16.9 h physical half-life, which has been shown to be a very attractive candidate for use in therapeutic nuclear medicine.The high beta emission has an average energy of 784 keV and a maximum energy of 2.12 MeV, sufficient to penetrate and destroy targeted …
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Tungsten is the only metallic element with a higher melting point. Uses. Rhenium is used as an additive to tungsten- and molybdenum-based alloys to give useful properties. These alloys are used for oven filaments and x-ray machines. It is also used as an electrical contact material as it resists wear and withstands arc corrosion.
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TF: 888-RHENIUM (888-743-6486) PH: 440-365-7388 FX: 888-366-9830 Yesterday's Pioneer, Today's Leader. rhenium W-25 Re Tungsten-Rhenium Alloy, Annealed | …
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The mechanical properties of chromium, molybdenum, and tungsten alloys are reviewed, with particular emphasis on high-temperature strength and low-temperature ductility. Precipitate strengthening is highly effective at 0.4 – 0.8 Tm in these metals, with HfC being most effective in tungsten and molybdenum, and Ta (B,C) most effective in …
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Abstract. Tungsten--rhenium--hafnium carbide (W---Re---HfC) alloy is the strongest metallic material at temperatures greater than 2000 K. In the this paper, the mechanical properties of tungsten and a W--3.6Re--0.26HfC alloy were determined from 1700 to 2980 K in a vacuum below 10[sup [minus]5] Pa. hfC particles had an exceptional …
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The addition of rhenium had four distinct effects on the tensile behavior of tungsten Rhenium content, atomic percent I I I I ~ I I I 0 .004,008,012,016 . a0 .024,028 P True strain, E Figure 2. -Tensile curves of (100) oriented tungsten single crystals containing various rhenium contents. Beyond 0.030 strain localized
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gallium, germanium, indium, selenium, silicon, tungsten, and vanadium. The use of these and other metals in bimetallic catalysts might decrease rhenium's share of the existing catalyst market; however, this would likely be offset by rhenium-bearing catalysts being considered for use in several proposed gas-to-liquid projects. Materials that
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Rhenium has one of the highest melting points of all elements, exceeded only by tungsten and carbon. It is also one of the most dense, exceeded only by platinum, iridium, and osmium. Rhenium's usual commercial form is a powder, but this element can be consolidated by pressing and resistance-sintering in a vacuum or hydrogen atmosphere.
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Tungsten (W) based materials are primary candidates for the plasma facing components (PFCs) in fusion power stations. A side effect of the use of W in neutron irradiation environments such as fusion is the transmutation to Rhenium (Re) and Osmium (Os), which are known to degrade the mechanical and thermal properties.
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In its elemental form, rhenium has a silvery-white appearance. Rhenium is the fourth densest element exceeded only by platinum, iridium, and …
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A mixed W–Re powder with a composition of 96.75% non-sag tungsten and 3.25% rhenium was prepared using 200 g of Re powder (re-claimed from wire scrap) and 5950 g standard non-sag tungsten powder. The W–Re powder-mix was blended in a V-blender for 60 min. A 6-kg ingot was pressed and pre-sintered in the wire factory.
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PDF | On Dec 31, 2020, Jiang Shan published Microstructure and Properties of Tungsten Rhenium Alloy Prepared by Laser Sintering | Find, read and cite all the research you …
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Machine learning hunts for the right mix of hydrogen isotopes for future nuclear fusion power plants Sep 1, 2023 Elucidating the mechanism of protective layers on fusion reactors that resist peeling
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Tungsten-Rhenium. (WRe) Alloys from Tungsten-Rhenium (WRe) are used in various compositions. The alloy element Rhenium transfers a number of interesting …
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Properties and microstructure of oxide dispersion strengthened tungsten alloy prepared by liquid-phase method: a review. The addition of the second phase into tungsten can significantly refine the grain size of tungsten alloys, and also play a role in dispersion strengthening, thus improving the properties of tungsten….
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Proper feeds and speeds are essential to be sure as much heat as possible is carried out with the chip. In most cases, alloys are much preferred over pure Tungsten which is the most problematic to machine. The machining of Tungsten Alloys has been compared to machining gray cast iron (it's highly abrasive) or in some cases, stainless steel.
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Oxidation Properties of W–5% Re and W–26% Re Tungsten–Rhenium Thermocouple Wires. Herein, the oxidation properties, i.e., oxidation processes in air, oxidation-product …
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The results showed that the tungsten-rhenium wires with nanofibrous grains exhibited a very high tensile strength reaching values of 3.5 GPa and 4.4 GPa for the coarse (grains diameter of 240 nm ...
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The solubility of tungsten in rhenium at the temperature of 2800 °C is 20%, and at the temperature of 1500 °C it is 12%. Rhenium solubility in nickel at 1620 °C is 17.4%. It should be emphasized that the attached system displays equilibrium with the W-Re phase above the temperature of 1500 °C.
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Rhenium can increase the strength and plasticity of W, Al and Cr simultaneously. ... On the Melting Point of the System Tungsten-Rhenium, Metall., 1930, 9, p 1063–1069. Google Scholar J.M. Dickinson, and L.S. Richardson, The Constitution of Rhenium-Tungsten Alloys, Trans. ASM, 1959, 51, p 758–771. Google ...
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In this study, Rhenium is added to traditional (W-Ni-Fe) Tungsten heavy alloys keeping the ratio of Ni:Fe as 7:3 constant and varying the proportions of W and Re. The alloys were prepared using ...
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The Ni–Co–Cr–W–Mo system is critical for the design of nickel-based superalloys. This system stabilizes different topologically close-packed (TCP) phases in many commercially superalloys with high W and Mo contents. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermodynamic calculations were …
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Tungsten potassium (WK) alloy has been reported as one of the ideal plasma-facing materials (PFMs). Tantalum alloying is a good method to improve the mechanical properties of tungsten. The effect of tantalum contents on the irradiation resistance of WK alloy has not yet been reported. In this study, WK (containing 82 ppm …
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