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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 …
The simultaneous synthesis and densification of rhenium diboride is investigated starting from Re and B as reactants by using the Spark Plasma Sintering …
Shear strength measurements have been carried out on rhenium diboride, ReB 2, to a pressure of 74 GPa using a Radial X-ray Diffraction (R-XRD) technique in a diamond anvil cell using platinum as an internal x-ray pressure standard.The R-XRD result has provided a unique insight into the deformation of hexagonal crystal lattice under non …
UCLA scientists have made rhenium diboride, an "ultra-hard material." Rhenium diboride is seen here in powder form (left), made from heating the elements in …
In the recent years, borides of rhenium (Re), osmium (Os) and iridium (Ir) have been studied as for their ultra-hardness and superior stiffness. In this dissertation, a mechanochemical method is introduced to produce rhenium diboride (ReB2) powder, a novel hexagonal osmium diboride (h-OsB2), and iridium boride powders.
Rhenium diboride (ReB2), 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 (WB2), which takes a structural hybrid between that of ReB2 and AlB2, where half of the boron layers are planar (as in AlB2) and half are …
UCLA scientists have made rhenium diboride, an "ultra-hard material." Rhenium diboride is seen here in powder form (left), made from heating the elements in a furnace, and as a pellet made by a procedure called arc melting. ... Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the ...
At low applied forces, the hardness of rhenium diboride is equivalent to cubic boron nitride, the second-hardest material known, Kaner said. At higher applied forces, rhenium diboride is a little ...
Rhenium diboride can scratch the surface of natural diamond, however, indicating that it's one of the hardest materials known. Chemical & Engineering News …
Dubrovinskaia et al. question our demonstration that rhenium diboride (ReB 2) is hard enough to scratch diamond.Here, we provide conclusive evidence of a scratch …
Rhenium diboride (ReB2) Rhenium can improve the creep strength of nickel superalloys, which can be used to make jet engine combustion chambers, turbine blades and exhaust nozzles. Rhenium-nickel alloy is the core material of modern jet engine blades, turbine disks and other important structural parts. Molecular weight:207.83. Density:12.7 g/cm3.
To explore how to fine-tune material compositions with greater accuracy and predictability, researchers from UCLA synthesized …
SECTION 1. IDENTIFICATION. Product Name: Rhenium Diboride Sputtering Target Product Number: All applicable American Elements product codes, e.g. RE-B-02-ST, RE-B-03-ST, RE-B-04-ST, RE-B-05-ST CAS #: 1 Relevant identified uses of the substance: Scientific research and development Supplier details: American Elements …
Rhenium diboride (ReB2), containing corrugated layers of covalently bonded boron, is a superhard, metallic compound with a micro-hardness reaching as high as 40.5 GPa (under an applied load of 0. ...
The simultaneous synthesis and densification of rhenium diboride is investigated starting from Re and B as reactants by using the Spark Plasma Sintering (SPS) apparatus. It is shown that SPS represents an effective technique to synthesize ReB 2 bulk samples with high purity and density. In particular, a dense product with traces of …
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 …
UCLA scientists have made rhenium diboride, an "ultra-hard material." Rhenium diboride is seen here in powder form (left), made from heating the elements in a furnace, and as a pellet made by ...
Abstract. Shear strength measurements have been carried out on rhenium diboride, ReB 2, to a pressure of 74 GPa using a Radial X-ray Diffraction (R-XRD) technique in a diamond anvil cell using platinum as an internal x-ray pressure standard.The R-XRD result has provided a unique insight into the deformation of hexagonal crystal …
Rhenium diboride is an established superhard compound that can scratch diamond and can be readily synthesized under ambient pressure. Here, we demonstrate two synergistic ways to further enhance the already high yield strength of ReB2. The first approach builds on previous reports where tungsten is doped into ReB2 at …
Superhard Rhenium Diboride at Ambient Pressure Hsiu-Ying Chung,1,2* Michelle B. Weinberger, 1* Jonathan B. Levine, Abby Kavner,3 Jenn-Ming Yang,2 Sarah H. Tolbert,1† Richard B. Kaner1,2† The quest to create superhard materials rarely strays from the use of high-pressure synthetic methods, which typically require gigapascals of applied pressure.
Rhenium diboride is an established superhard compound that can scratch diamond and can be readily synthesized under ambient pressure. Here, we demonstrate …
Rhenium diboride (ReB2) Rhenium can improve the creep strength of nickel superalloys, which can be used to make jet engine combustion chambers, turbine blades and exhaust …
Rhenium diboride is mixed to the molybdenum with various weight percentages such as 3, 5 and 8%. The material properties are evaluated for the sample specimens. Based on the comparison of material properties, molybdenum with 8% of rhenium diboride has been considered for these experimental investigations. Due to …
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 (ReB 2) exhibits high differential strain due to its puckered boron sheets that impede shear deformation.Here, we demonstrate the use of solid solution formation to enhance the Vickers hardness and differential strain of ReB 2.ReB 2-structured solid solutions (Re 0.98 Os 0.02 B 2 and Re 0.98 Ru 0.02 B 2, noted …
Recently, the superhardness of rhenium diboride was discovered. This study presents a first successful preparation and characterization of thin ReB2 films. The films were deposited by the pulsed laser deposition (PLD) technique. The morphology, microstructure, and hardness of the films were investigated. The films are compact and continuous, with a …
In this work, ultrahigh pressure experiments on transition metal rhenium diboride (ReB2) were carried out in a diamond anvil cell under isothermal and non-hydrostatic compression. Two independent ...
Abstract. The quest to create superhard materials rarely strays from the use of high-pressure synthetic methods, which typically require gigapascals of applied …
The rhenium atom has a radius of 137 pm and a Van der Waals radius of 217 pm. Rhenium was discovered and first isolated by Masataka Ogawa in 1908. In its elemental form, rhenium has a silvery-white appearance. …
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 the diamond. However, the ultrahigh hardness has not been confirmed. The production method of this material does not involve high pressures as with other hard ...
From R-XRD data, we have estimated hydrostatic component of compression to determine an equation of state of rhenium diboride yielding a bulk modulus of K 0 = 366 ± 25 GPa with a pressure …