In this work, we foresee the structure of a new class of borophenes with smaller two-dimensional (2D) densities of atoms than those explored so far for 2D boron crystals. Boron atoms in the porous borophenes tend to be five-coordinated in contrast with commonly investigated structures with hexagonal holes for which the number of nearest neighbors of …

Boron nitride binds well with metals, due to formation of interlayers of metal borides or nitrides. Materials with cubic boron nitride crystals are often used in the tool bits of cutting tools. Ceramic binders can be used as well. For grinding applications, softer binders, e.g. resin, porous ceramics, and soft metals, are used.

The hard template method is commonly used to prepare mesoporous boron nitride materials. The porous solid was used as template, the precursor of boron nitride was impregnated in the pore channel to synthesize boron nitride, and then the template was removed to obtain porous boron nitride material with corresponding pore structure.

Porous metal-bonded wheels coupled with the aggregated cubic boron nitride (cBN) grains and water-soluble carbamide particles as pore-forming agents were fabricated, aiming to the improvement of grinding wheel performance and ground surface quality in grinding of Ti–6Al–4V alloys.

Although boron nitride has three crystal structures, ① graphite-like hexagonal boron nitride (H-BN); ② Densely packed hexagonal boron nitride (W-BN); ③ Cubic boron nitride (C-BN) is similar to diamond, but hexagonal boron nitride is the most widely used and can also be made into porous materials.

The present invention discloses a kind of cubic boron nitride monocrystal and preparation method thereof, the raw material including following mass parts: hexagonal boron nitride 75-90%, the metal magnesium powder 5-15% of combination grain, lithium hydride 4.99-8%, microelement 0.01-8%.The particle size range of the metal magnesium powder of the combination grain is …

Polycrystalline boron carbide has a hardness of about 40 GPa at room temperature [211, 212], third only to diamond and cubic boron nitride. There is a linear increase in hardness with the carbon content, in the phase homogeneity range [212]. ... metals, e.g. by infiltration of a porous sintered or reaction formed preform, ...

Vitrified bond cubic boron nitride (CBN) grinding wheels with various porosities (36.5–43.5%) were fabricated by adding polymethylmethacrylate (PMMA) and activated carbon pore former.

boron nitride cubic boron nitride sintered sintered Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number JP62046499A Other languages English (en) Other ...

High-efficiency deep grinding experiments of Inconel 718 nickel-based superalloy was carried out with the porous metal-bonded cubic boron nitride superabrasive wheel, in which the uniform and large pores were formed by the broken alumina bubble particles in the working layer after wheel dressing.

Polycrystalline cubic boron nitride powder of particle size ~220 μm was purchased from Iljin Diamond Co., Ltd., Seoul, Korea. KCl, NaCl and K 2 TiF 6 were purchased from Aldrich Co., Ltd. Darmstadt, Germany. Silver nitrate and tin chloride were provided from BDH Chemicals Ltd., Poole, UK. Formaldehyde and sodium hydroxide was supplied by ...

With Highly Porous Wheels of Cubic Boron Nitride Vladimir Lebedev, Olga Frolenkova, Tatyana Chumachenko, Alla Bespalova and Oksana Faizulina EasyChair preprints are intended for rapid dissemination of research results and are integrated with the rest of EasyChair. October 26, 2019

Boron nitride binds well with metals, due to formation of interlayers of metal borides or nitrides. Materials with cubic boron nitride crystals are often used in the tool bits of cutting tools. For grinding applications, softer binders, e.g. resin, porous ceramics, and soft metals, are used. Ceramic binders can be used as well.

Gold, silver, and other precious metals are very important nonferrous metals and have been widely applied in fields such as electronics, medicine, metallurgy, pharmaceuticals, and transportation. Adjustable properties of precious metals are mainly attributed to controlled synthesis of precious metals by structure, size, composition, and morphology. Synthesis of …

Through the example of grinding high-temperature nickel and titanium alloys and high-alloy steels using highly porous vitrified cubic boron nitride wheels, the authors have demonstrated the ...

High-efficiency deep grinding experiments of Inconel 718 nickel-based superalloy was carried out with the porous metal-bonded cubic boron nitride superabrasive wheel, in which the uniform and large pores were formed by the broken alumina bubble particles in the working layer after wheel dressing.

Highly porous cubic boron nitride wheels for dry grinding V. K. Starkov 1 Journal of Superhard Materials volume 35, pages 298–302 ( 2013 ) Cite this article

A novel cubic porous carbon allotrope C96 carbon with intriguing physical properties was predicted. It has 96 atoms in the conventional cell, possessing a Pmm space group. The basic building block of C96 carbon is a planar six-membered carbon ring. The structural stability, mechanical properties, and dynamical properties of C96 carbon were …

aluminum alloys of nickel, cobalt, manganese, iron, vanadium and chromium have been found to provide successful bonding mechanisms for the preparation of cubic boron nitride (cbn) compacts. these bonding media are particularly effective for preparing compacts of cbn crystals smaller than about 30 micrometers in largest dimension. the preparation of tool inserts made …

The porous BN materials entail large surface areas, ranging from 2800 to 4800 m 2 /g.

A cubic boron nitride sintered material includes: more than 80 volume % and less than 100 volume % of cubic boron nitride grains; and more than 0 volume % and less than 20 volume % of a binder phase. The binder phase includes: at least one selected from a group consisting of a simple substance, an alloy, and an intermetallic compound selected from a …

The paper addresses kinematics of the rotary method whereby a grinding wheel is dressed by a rotating diamond cup wheel. Through the example of grinding high-temperature nickel and titanium alloys and high-alloy steels using highly porous vitrified cubic boron nitride wheels, the authors have demonstrated the advantages of the proposed dressing method over …

Porous boron nitride (BN) is structurally analogous to activated carbon. This material is gaining increasing attention for its potential in a range of adsorption and chemical separation applications, with a number of recent proof-of-concept studies on the removal of organics from water. Today though, the properties of porous BN—i.e., surface area, pore network, chemistry—that dictate ...

12%Porous metallic cubic boron nitride (CBN) composites with 50 vol.% porosity were prepared by using water soluble spherical carbamide particles as pore-forming agents. Graphene nanoparticles were employed in porous metallic CBN composites via a conventional vacuum sintering technique to strengthen the mechanical property of as-sintered …

JP-2012101358-A chemical patent summary.

Cubic Boron Nitride (CBN) is a synthetic chemical compound made up of boron and nitrogen atoms in a one-to-one ratio. Unlike other types of boron nitride, it exists as a cubic crystal lattice, with its atoms arranged in a symmetrical, cube-shaped structure like the crystalline structure of …

Boron Nitride Aerogel Boron nitride aerogel is a new type of nanomaterial with a three-dimensional porous network structure with solid as the framework and gas as the dispersion medium. It exhibits excellent properties such as high specific surface area, high porosity, and low density.

boron nitride cubic boron light permeable nitride fine Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Pending Application number JP57168083A Other languages English (en) Other ...

Conventional high porous cubic boron nitride (cBN) wheels do not provide such possibilities since they have fewer abrasive grains on the active surface, what results in …

In this paper, three dimensional porous boron nitride nanosheets (3D porous BNNSs) with high chemical stability and excellent adsorption capacity for organic dyes have been successfully synthesized through a template-free route. The 3D porous BNNSs consist of uniform nanosheets with average diameter of about 200 nm and thickness of about 3 nm.