Zhang, S. Veprek, and A. S. Argon, " Mechanical and electronic properties of hard rhenium diboride of low elastic compressibility studied by first-principles calculation," Appl. Phys. Lett. 91, 201914 (2007).
Rhenium diboride (ReB2) is a synthetic superhard material. It was first synthesized in 1962 and re-emerged recently due to hopes of achieving high hardness comparable to that of diamond. However, the ultrahigh hardness has not been confirmed.
Superhard Rhenium Diboride at ... the arc-melted ingot and the polycrystalline powder produced from the elements, confirmed the synthesis of phase-pure ReB 2 (fig. S1). These materials were then examined by micro-indentation and in situ high-pressure x-ray diffraction techniques.
ABSTRACT: Rhenium diboride (ReB 2), containing corrugated layers of covalently bonded boron, is a superhard metallic compound with a microhardness reaching as high as 40.5 GPa (under an applied load of 0.49 N). Tungsten diboride (WB 2), which takes a structural hybrid between that of ReB 2 and AlB 2, where half of the boron layers are planar ...
Rhenium diboride (ReB 2) is a hard compound having the hardness similar to that of tungsten carbide, silicon carbide, titanium diboride or zirconium diboride. Organorhenium compounds. Dirhenium decacarbonyl is the most common entry to organorhenium chemistry. Its …
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Jul 05, 2011· Tungsten tetraboride (WB 4) ... Among these, rhenium diboride ... Making solid ingots of phase pure WB 4 is especially challenging because the tungsten–boron phase diagram indicates that WB 2 is thermodynamically favorable with any W∶B molar ratio below 1∶12 .
Rhenium diboride's monocrystal elastic constants, 308 to 5 K Yoko Suzukia National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 Jonathan B. Levine Department of Chemistry and Biochemistry, and California …
The team put a mixture of rhenium and boron powder in a furnace and ran a large electric current through it. This quickly melted the materials, allowing the formation of small ingots, just several centimeters long.
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Rhenium forms rhenium diboride with boron. 9) It is a compound noted for its extreme hardness.Isotopes of rhenium are radioactive. The 188 isotope, with a half-life of 69 days, has been tested for treatment of liver cancer.
Rhenium diboride - The chemistry information portal … Rhenium diboride Rhenium diboride (ReB2) is a synthetic superhard material of hardness comparable to diamond. It was discovered by a team at UCLA. The. Chat Online >>
Reactive Spark Plasma Sintering of rhenium diboride. ... A potential alternative to diamond is also represented by rhenium diboride, ... arc melting has the drawback to require the obtained ingots to be melted 3–5 times under argon atmosphere to ensure homogeneous mixing of the elements.
of Ultra-Incompressible Superhard Rhenium Diboride at Ambient Pressure ... An ingot of ReB 2 ~4 mmin diameter wasattachedtoastylus with mounting wax. The sample was moved » Learn More. Rhenium diboride - Wikipedia, the free encyclopedia. Rhenium diboride (Re B 2) is a synthetic superhard material.
Rhenium is also used in the creation of certain "superhard" materials. Rhenium diboride (ReB 2) has a similar hardness to tungsten carbide, silicon carbide and titanium diboride, however it exhibits anisotropy, which means that its hardness is very