The β− emitter, rhenium-188 (188Re), has long been recognized as an attractive candidate for targeted cancer radionuclide therapy (TRNT). This transition metal shares chemical similarities with its …
It has been demonstrated that during heat treatment there was formation of a two-phase (α + β)-structure. In this case rhenium, as also chromium, vanadium, and molybdenum, is concentrated within β -phase. ... E. N. Kablov, "Physicochemical and production features of heat-resistant alloy creation containing rhenium," Vestn. Mosk. …
Element Rhenium (Re), Group 7, Atomic Number 75, d-block, Mass 186.207. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Jump to main content.
structure is found in the composition range 43-65 wt. per c e nt rhenium. In this investigation, alloys containing ... at 6·4° and 8·8° K for samples containing 6 12 wt. per cent rhenium ...
A series of sodium borosilicate glasses were synthesized with KReO 4 or Re 2 O 7, to 10,000 ppm (1 mass%) target Re, to assess effects of large concentrations of rhenium on glass structure and ...
The ductility of Group VIA alloys containing rhenium and other solutes from Groups MA and VIIIA was reviewed. The rhenium ductilizing effect, found in Group VIA alloys containing 25 to 35 at. %Re, is promoted by other solutes from Group VIIA and the early ... is analogous to the molybdenum and tungsten alloys with respect to structure, fabrica
Two fac-Re(CO)3-based rectangles containing the dithienylethene-based 4,4′-bipyridyl ligand display photochromic properties both in solution and in the single-crystal state. Photochromic Rhenium-Based Molecular Rectangles: Syntheses, Structures, Photophysical Properties, and Electrochemistry | Inorganic Chemistry
Abstract Comparative long-term creep tests of [001] single crystals of third-generation rhenium-containing nickel-based superalloy VZhM1 and fourth generation rhenium- and ruthenium-containing nickel-based superalloy VZhM4 were performed at temperatures of 850, 1000, 1100, and 1150°C for durations up to ~3000 h. It has been …
Nickel-based single-crystal superalloys are the key materials for the manufacturing and development of advanced aeroengines. Rhenium is a crucial alloying element in the advanced nickel-based single-crystal superalloys for its special strengthening effects. The addition of Re could effectively enhance the creep properties of the single …
The chemical and phase compositions of a rhenium-ruthenium-containing fifth-generation VZhM8 nickel superalloy, which is intended for single-crystal turbine blades of an aviation engine, are calculated using computer simulation. VZhM8 alloy <001>, <011>, and <111> single crystals are fabricated. The microstructure, the γ/γ' misfit, the …
Rhenium (Re), chemical element, a very rare metal of Group 7 (VIIb) of the periodic table and one of the densest elements. Predicted by the Russian chemist Dmitry Ivanovich Mendeleyev (1869) as chemically related to manganese, rhenium was discovered (1925) by the German chemists Ida and Walter
The sample containing Re is sintered at 600-700 °C for 2-3 h with CaO and Ca (NO 3) 2, then the sinter is leached with hot dilute bromine water. Most metals (including …
absorption and fine structure (EXAFS) measurements have also been car- ried out on the supported rhenium oxide on alumina system by Ellison et al. [19]. The measurements were made under ambient conditions on the Re Ls edge for rhenium oxide on alumina catalysts prepared from ammonium perrhenate.
A possible crystal structure of Rhenium is hexagonal close-packed structure. In metals, and in many other solids, the atoms are arranged in regular arrays …
Rhenium (Re), chemical element, a very rare metal of Group 7 (VIIb) of the periodic table and one of the densest elements. Predicted by the …
Rhenium – the hot superalloy element. The jet turbines in newer generation U.S. fighters, such as these F35s flying over Alaska, are made from nickel-based alloy containing 6 percent rhenium. With a melting point of 5,756 degrees Fahrenheit and a heat-stable crystalline structure, rhenium is extremely resistant to both heat and wear.
The dendritic structure is not visible anymore and the local variation in the chemical composition of slowly diffusing element Re in Alloy-ReRu is 16% at the most. ... The three-dimensional morphology of topologically close packed phases in a high rhenium containing nickel based Superalloy: the three-dimensional morphology of TCP phases. …
and structure of the coating were studied by variety of . ... rhenium-containing nickel superalloy in sulfuric acid . electrolytes, Russian Metallurgy 2011 (6) 589-593 (in . Russian).
Single crystals of rhenium-containing ZhS32-VI, ZhS32U nickel superalloys with the 〈001〉, 〈011〉, and 〈111〉 crystallographic orientations have been produced by directional solidification. The alloying element segregations and the thermal stability of the microstructure consisting of a γ solid solution and hardened by precipitates of the γ′ …
Rhenium is used as an additive to tungsten and molybdenum-based alloys (also elements which have high melting points) to increase the ductility (allows it to withstand stress). This metal despite its rarity is commonly found in almost all electric ovens, filament lamps, even if it is a miniscule amount. It is even used with platinum as a ...
Synthesis, structure and reactivity of tetranuclear square-type complexes of rhenium and manganese bearing pyrimidine-2-thiolate (pymS) ligands: versatile and efficient precursors for mono- and polynuclear compounds containing M(CO)3 (M = Re, Mn) fragments. Dalton Transactions 2009, 100 (23), 4458.
Data provided by IFI CLAIMS Patent Services. There is disclosed a novel and improved gold alloy containing at least about 5.5 per cent of palladium and about 0.03 to 1.0 per cent by weight of rhenium, and either or both of platinum and iron when the palladium content is less than 25.0 per cent.
equilibrium structure of rhenium-containing alloys, was modified . to give the version known as 'Super 5' [16]. The compositions of . the TCP phases for the ahoy RR2071 predicted using this .
In this case, the heteropolyacid structure is to be hydrolyzed under alkaline conditions and produced molybdate anions are repulsed from the cation exchange, i.e., negatively charged matrix. ... Blokhin, A. et al. (2009), "Ion Exchange Recovery of Rhenium from Molybdenum Containing Sulfuric Acid Solutions," Russian Journal Non-ferrous ...
A crystal structure containing Rhenium: Image showing CSD Entry: ACAHAN, Rhenium atoms shown as blue spheres. Facts about this structure: Formula: (C70 H56 Mn4 N14 …
We focus attention on the difference between the dendrite structures of cobalt-free and rhenium-free VKNA-1V alloys and the VKNA-25 alloy containing these AEs. The dendrites of both alloys have a two-phase structure: the γ'-phase portions several micrometers in size are separated by interlayers of nickel-based γ-solid solution with …
Highlights. Rhenium coating was prepared on the isotropic graphite and C/C composite by chemical vapor deposition. The rhenium coating on the isotropic graphite was compact and crack-free with a preferential growth orientation of 〈0 0 2〉. The cracks in the coating on C/C composite were resulted from thermal expansion mismatch and …
The structure of molybdenum ions depends on pH values in the contacting solution 6, ... The sulphuric acid and nitric–sulphuric acid systems obtained after processing of rhenium-containing molybdenum concentrates were used for the anion exchangers testing under laboratory and industrial conditions 6, 9, 12.
Figure 8. Optica! micrographs oj (a) a eVD WoRe aUoy containing <5% Re, showing a columnar microstructure; (b) a eVD WoRe aUoy containing 10-20% Ae, wilh a !ess-oriented microstructure; and (cl a eVD WoRe aUoy containing 25-30% Re, showing a laminar microstrLlClure. duced is the columnar, highly oriented structure shown in FigureS. …
