Resolving the sintering conundrum of high-rhenium tungsten …

Sintering tungsten-rhenium (W-Re) alloys becomes difficult with increasing Re content, which is revealed by the final-stage bifurcation. The pressureless two-step sintering method is carried out to resolve the sintering conundrum and produces ultrafine-grained W-Re alloys containing up to 25 wt% Re with record-fine grain sizes, uniform …

Enthalpy of mixing of W–Re structures calculated using DFT …

The electrical resistivity of solid-state tungsten (W) and rhenium (Re) was experimentally measured at high pressures up to 5 GPa and temperatures up to ∼2273 K using a four-wire resistivity method.

Tungsten Rhenium Alloy | AMERICAN ELEMENTS

SECTION 1. IDENTIFICATION. Product Name: Tungsten Rhenium Alloy Product Number: All applicable American Elements product codes, e.g. W-RE-02, W-RE-03, W-RE-04, W-RE-05 CAS #: 1 Relevant identified uses of the substance: Scientific research and development Supplier details: American Elements 10884 Weyburn Ave.

Properties of tungsten-rhenium alloys | Semantic Scholar

Conclusions1.The W-Re equilibrium diagram has been constructed [Figure 6].2.Addition of Re to tungsten raised the temperature of incipient recrystallization of tungsten VCh wire by 200–400°C, depending on the rhenium content.3.Rhenium improved the strength and ductility of tungsten in the 20–3000°C range.4.W-Re wire developed a high strength and …

"SPS Fabrication of Tungsten and Tungsten Rhenium Alloys in Support …

Concurrently, tungsten and rhenium powders with average respective diameters of 0.5 µm and 13.3 µm were pre-processed either by High-Energy-Ball-Milling (HEBM) or by homogeneous mixing to yield W-25at.%Re mixtures. The powder batches were sintered at temperatures of 1975 K and 2175 K for hold times up to 60 minutes …

Wafer Testing With Tungsten and Tungsten-Rhenium Probe …

Broz received a Ph.D. in mechanical engineering from the University of Colorado. Advanced Probing Systems, P.O. Box 17548, Boulder, CO 80308, (303) 939-9384. Most integrated circuits are tested ...

Thermodynamic properties of Re-W (rhenium-tungsten) …

Download Citation | Thermodynamic properties of Re-W (rhenium-tungsten) system | This chapter provides the phase diagram, enthalpy of formation and enthalpy of …

A study of scandia and rhenium doped tungsten matrix

The addition of scandia and rhenium could decrease the particle size of doped tungsten, for example, the tungsten powders doped with Sc2O3 and Re had the average size of about 50nm in diameter.

Reduction, sintering and mechanical properties of rhenium-tungsten …

Tungsten-rhenium mixed powders were prepared by spray drying followed by a two-step hydrogen reduction method. With these powders, W-Re mixed metal matrix cathodes were prepared by processes of ...

Unveiling the intrinsic rhenium effect in Tungsten

The effect of Re is positive below 200 °C, showing a small increase in fracture energy of W- Re alloys between 50 °C and 200 °C, i.e., a toughening regime ( Fig. 3 (a), inset). The maximum toughening occurs at 5 wt.% Re, coinciding with the room-temperature hardness results ( Fig. 1 (d)).

A tungsten-rhenium interatomic potential for point defect …

A tungsten-rhenium (W-Re) classical interatomic potential is developed within the embedded atom method interaction framework. A force-matching method is employed to fit the potential to ab initio forces, energies, and stresses. Simulated annealing is combined with the conjugate gradient technique to search for an optimum potential …

Microstructure and Properties of Tungsten Rhenium …

Abstract. 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 difractometer ...

Crystallographic texture and grain boundary character …

Maintaining a ball-to-powder weight ratio (BPR) of 10:1 and a vial rotational speed of 250 rpm for 20 h ensures uniform blending and mixing. Powders of rhenium, tungsten, nickel, and copper were mechanically alloyed (ball milled) and then sintered using a vacuum hot press sintering process with a constant Ni: Cu stoichiometry and a …

Preliminary Study of the Rhenium Addition on the Structure …

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.

Rhenium Alloys: Pure Tungsten wire and rod

185 K-Cal/gm atom at 5660 °C. 8.42 Cal/gm m. PH: 440-365-7388. FX: 888-366-9830. TF: 888-743-6486. (888-RHENIUM) Rhenium Alloys is a leading manufacturer and supplier of pure Tungsten and Tungsten alloy products including wire, …

Unveiling the intrinsic rhenium effect in Tungsten

The effect of Re is positive below 200 °C, showing a small increase in fracture energy of W- Re alloys between 50 °C and 200 °C, i.e., a toughening regime ( Fig. 3 (a), …

Rhenium-188 Labeled Tungsten Disulfide Nanoflakes for …

Rhenium-188 Labeled Tungsten Disulfide Nanoflakes for Self-Sensitized, Near-Infrared Enhanced Radioisotope Therapy ... (188) Re, a widely used radioisotope for RIT, upon simple mixing. Like other high-Z elements acting as radiosensitizers, tungsten in the obtained (188) Re-WS2 -PEG would be able to absorb ionization radiation generated …

Effect of concentration of rhenium and temperature on …

Using the EAM potential, we conducted a molecular dynamics (MD) simulation using the LAMMPS software [19] to investigate the structural behavior of tungsten (W) and tungsten-rhenium (W(1-x)-Rex) alloys with × = 5, 10, and 25 wt%Re. To achieve this, we constructed a cubic body-centered structure (BCC) single crystal box …

Solution and diffusion of hydrogen isotopes in tungsten-rhenium alloy

1. Introduction. Tungsten (W) and its alloys are the promising plasma-facing material (PFM) for fusion reactor because of their high melting point, low sputtering yield, good thermal conductivity and low tritium (T) retention [1], [2], [3].The plasma-facing components must withstand high heat and high flux particle bombardment escaping from …

Tensile and impact properties of tungsten-rhenium alloy …

Tungsten (W) is the most promising as plasma facing material of the fusion reactor divertors because of its high melting point, high thermal conductivity, low tritium retention, and low sputtering rate. ... Alloying by rhenium (Re) is one of the common methods as solid solution alloying of W materials. It is well known that substitutional solid ...

Advanced Processing and Machining of Tungsten and Its …

Tungsten is a refractory metal with the highest melting temperature and density of all metals in this group. These properties, together with the high thermal conductivity and strength, make tungsten the ideal material for high-temperature structural use in fusion energy and other applications. It is widely agreed that the manufacture of components …

Rhenium alloying of tungsten heavy alloys | Request PDF

Abstract. 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 at 1500 C in 60 ...

Microstructure and Properties of Tungsten Rhenium Alloy …

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 ...

Testing the Limits of Superhard Rhenium/Tungsten Diboride …

On rare occasion, mixing two materials yields better hardness characteristics than either parent material exhibits alone. To explore how to fine-tune material compositions with greater accuracy and predictability, researchers from UCLA synthesized solid "solutions" of rhenium/tungsten diboride (ReWB 2 ), where tungsten …

Resolving the sintering conundrum of high-rhenium …

Sintering tungsten-rhenium (W-Re) alloys becomes difficult with increasing Re content, which is revealed by the final-stage bifurcation. The pressureless two-step …

Strengthening of tungsten by coherent rhenium …

Experimental data show that the accumulation of rhenium and osmium from transmutation reactions severely afect the microstructural evolution and property degradation of …

Tungsten Rhenium | 5 pronunciations of Tungsten Rhenium …

Record yourself saying 'tungsten rhenium' in full sentences, then watch yourself and listen. You'll be able to mark your mistakes quite easily. Look up tutorials on Youtube on how to pronounce 'tungsten rhenium'. Focus on one accent: mixing multiple accents can get really confusing especially for beginners, so pick one accent (US or UK) and ...

Reduction, sintering and mechanical properties of rhenium …

W-Re alloy are conventionally obtained by powder metallurgy method using tungsten and rhenium metal powders mixed by ball-milling in industrial production [18], [19], [20], [21]. However, it is difficult to achieve uniform mixing of tungsten and …

A study of scandia and rhenium doped tungsten matrix

Fig. 3 shows the SEM micrographs of the doped tungsten powder. Scandium oxide doped tungsten powder prepared by mechanical mixing had large particles, see Fig. 3 a. EDS results shown in Fig. 3 b displayed that scandium and tungsten did not distribute evenly in the doped powder since only tungsten was detected in area A, and tungsten …

Recent Developments in Rhenium and Rhenium Alloy …

rhenium salt-tungsten oxide mixture, were found to give rise to additional problems. Rhenium compounds show a faster reduction rate than do compounds of tungsten. …