Cubic Boron Nitride (CBN) Monocrystal And Micropowder Cas No.10043-11-5

Cubic Boron Nitride (CBN) Monocrystal And Micropowder Cas No.10043-11-5

Physical and Chemical Properties

(1) Mechanical Properties

*Ultra-high hardness: Second only to diamond, it ranks among the hardest known materials, far surpassing standard abrasives. It effortlessly machines ultra-hard metals, maintains sharp cutting edges and resists abrasion during grinding.

*Superior wear resistance: More than four times that of traditional abrasives, cutting abrasive consumption, extending wheel service life, lowering replacement expenses and enabling continuous uninterrupted production.

*Excellent bending strength: Its stable monocrystalline structure withstands heavy grinding loads without chipping or fracture, ensuring stable and safe grinding operations.

(2) Thermal Properties

*Outstanding thermal stability: Far superior to diamond, it retains full hardness and structural integrity under high-temperature grinding conditions, supporting high-speed, high-efficiency grinding without performance degradation at elevated temperatures seen in conventional abrasives.

*Good thermal conductivity: Rapidly dissipates heat generated during grinding, lowering temperatures at the contact zone to prevent workpiece deformation and cracking, slow thermal aging of abrasives and extend tool life.

(3) Chemical Properties

CBN exhibits exceptional chemical inertness and rarely reacts with other substances. When grinding ferrous metals and alloy steels, it does not chemically interact with workpieces, preserving sharp cutting edges, reducing cutting resistance, guaranteeing superior workpiece quality and boosting grinding efficiency. It is the premier abrasive for ferrous metal processing.

BoronHub Custom-Developed CBN Monocrystal Series

HBCBN76

Ti Hardness Index: ≥76 Available grain sizes: 80/100 ~ 325/400 Description: Jet-black single crystals with complete regular block morphology, abundant intact crystal faces and sharp angular edges. Featuring ultra-high strength and thermal stability, it fits heavy-duty grinding and is compatible with metal and vitrified bond systems.

HBCBN71

Ti Hardness Index: ≥71 Available grain sizes: 80/100 ~ 325/400 Description: Jet-black irregular block single crystals with abundant sharp edges. It balances superior sharpness and self-sharpening performance alongside high strength and thermal stability to deliver both high efficiency and long service life. Suitable for vitrified bond and high-strength resin bond systems.

HBCBN69

Ti Hardness Index: ≥69 Available grain sizes: 80/100 ~ 325/400 Description: Brown regular block single crystals with high mechanical strength and thermal stability and layered cleavage planes. Compatible with high-temperature vitrified, metal and electroplated bond systems.

HBCBN63

Ti Hardness Index: ≥63 Available grain sizes: 80/100 ~ 325/400 Description: Brown irregular single crystals with excellent sharpness and controlled micro-fracturing capability. Suitable for high-temperature vitrified, resin and electroplated bond systems.

BoronHub Custom-Developed CBN Micropowder Series

CBN micropowder is manufactured via crushing, shaping, purification and classification of CBN single crystals, categorized into sinter-grade micropowder and ultra-precision lapping powder. Featuring excellent self-sharpening properties and high purity, it is used to fabricate sintered superhard cutting tools and for precision grinding, polishing and ultra-fine finishing. BoronHub’s standard CBN micropowder complies with international grain size standards, covering 12 distinct grades with D50 median particle sizes ranging from 1.25 μm to 32 μm.

What are the Application Fields and End Uses of Cubic Boron Nitride (CBN)?

Leveraging ultra-high hardness, exceptional wear resistance and superior thermal stability, CBN is widely deployed across three core sectors: abrasive tools, cutting tools and functional materials. It delivers unmatched performance in ferrous metal machining, enabling high-precision, high-efficiency processing with lower overall costs. BoronHub’s full CBN product portfolio (monocrystals and micropowder) features high purity, robust thermal stability and a complete particle size spectrum to match diverse processing requirements. Detailed applications and specifications are listed below:

I. Abrasive Tool Sector (Core Application)

CBN monocrystals and micropowder are the fundamental raw materials for CBN grinding wheels. Blended with different bonding agents to produce specialized abrasives, CBN grinding wheels outperform conventional alternatives with minimal wear, extended service life, higher throughput and superior dimensional accuracy, eliminating workpiece defects and suiting automated production lines.

 

Matching guide for CBN monocrystal grades and wheel bond systems:

*Vitrified bond CBN grinding wheels: Brown irregular CBN monocrystals with Ti ≥63, outstanding sharpness and controlled micro-fracturing; grain range 80/100 ~ 325/400

 

 

*Metal bond CBN grinding wheels: Regular brown block CBN monocrystals with Ti ≥69, high strength, thermal stability, layered cleavage planes and good micro-fracturing performance; grain range 80/100 ~ 325/400

*Resin bond CBN grinding wheels: Brown irregular CBN monocrystals with Ti ≥63, excellent sharpness and micro-fracturing capability; grain range 80/100 ~ 325/400

*Electroplated bond CBN grinding wheels: Brown irregular CBN monocrystals with Ti ≥63, superior sharpness and controlled micro-fracturing; grain range 80/100 ~ 325/400

II. Cutting Tool Sector

CBN single crystals are fabricated into CBN and PCBN cutting inserts. High-purity, wear-resistant, thermally stable CBN micropowder is used to develop long-life PCBN composite blanks and polycrystalline sintered compacts. CBN cutting tools excel in high-speed turning of ultra-hard ferrous alloys, with service life over 10 times longer than conventional tooling. Widely used in the automotive industry for cast iron engine components, they drastically boost machining efficiency and surface finish quality.

 

 

III. Functional Material Sector

As microelectronics advance toward higher integration density, high-thermal-conductivity CBN monocrystal is deployed as a filler in composite materials for electronic component encapsulation. It addresses heat dissipation demands of high-frequency heat-generating chips, supporting technological upgrades in the semiconductor industry.

 

Summary

CBN demonstrates unparalleled performance in ferrous metal machining, with metal removal rates 10 times higher than diamond. It enables efficient, high-precision, energy-saving manufacturing and cuts total production costs. BoronHub provides customized CBN grades tailored to specific bond systems and machining requirements to fully unlock the material’s core performance advantages.